Article
Materials Science, Multidisciplinary
Mozhgan Shokri, Abbas Zarei-Hanzaki, Hamid Reza Abedi, Jae Hyung Cho
Summary: The study investigated the correlation between microstructure/texture evolutions and high temperature flow behavior in Mg alloy containing long period stacking order (LPSO) phases. The annealing treatment effectively strengthened the alloy and decreased ductility, with blocky LPSO assisting dynamic recrystallization and lamellar LPSO increasing alloy strength. The findings suggest that microstructure and texture evolution play a significant role in the high-temperature behavior of the Mg alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Z. Aalipour, A. Zarei-Hanzaki, A. Moshiri, H. R. Abedi, Daudi Waryoba, A. Kisko, L. P. Karjalainen
Summary: The microstructure and microtexture changes of an extruded and annealed magnesium alloy were investigated under different strain and processing conditions. The results showed that the material underwent noticeable refinement even at low applied compressive strain. Recrystallization process was completed at a true strain of 0.3, and grain refinement was attributed to the LSN and CDRX mechanisms. At higher strain levels, most grains were found in deformed states and the microtexture only changed in terms of intensity.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
Zhao Yang, Chao Xu, Taiki Nakata, Shigeharu Kamado
Summary: This study investigated the effect of extrusion parameters on the microstructural evolution and tensile properties of a Mg-8.0Gd-4.0Y-1.0Mn-0.4Sc alloy. Different DRX mechanisms, such as DDRX and CDRX, were identified, and the alloy with larger extrusion ratio exhibited smaller DRXed grains and a high number of fine precipitated particles. The alloy extruded at 400°C and ratio of 20:1 showed superior strength, while alloy extruded at 450°C and ratio of 10:1 exhibited higher elongation to failure. The enhanced strength was attributed to strong basal texture, refined DRXed grains, and dense distribution of fine particles.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Yu-Ying He, Gang Fang
Summary: In this study, the dynamic precipitation (DP) of Mg17Al12 phase during the deformation of an Mg-Al-Zn-RE alloy was investigated. The effects of temperature and strain rate on the volume fraction, number density, and average size of Mg17Al12 precipitates were studied. Phenomenological models linking the precipitation parameters with deformation conditions were established and validated. The pinning effect of DP on grain growth and the influence of temperature on DRXed grain size were also discussed. The results provide insights into the understanding of microstructural evolution in the Mg-Al-Zn-RE alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Ruizhi Peng, Chun Xu, Yu Li, Shaoxiong Zhong, Xiang Cao, Yafei Ding
Summary: The effect of differential roller temperature on the microstructure evolution, deformation mechanism, and mechanical properties of AZ31B alloy sheet was investigated. Higher roller temperature difference led to a larger shear strain and the formation of multiple-twinning systems. The annealed sample with higher temperature difference achieved better ductility.
MATERIALS RESEARCH LETTERS
(2022)
Article
Metallurgy & Metallurgical Engineering
Yuxuan Liu, Yangxin Li, Qingchun Zhu, Huan Zhang, Xixi Qi, Duofei Zheng, Yunliang Li, Dezhi Zhang, Xiaoqin Zeng
Summary: The local deformation behavior and dynamic recrystallization of shock compressed Mg-1Zn alloy were investigated using EBSD and TEM. The suppression of dislocation slipping and twinning during high strain-rate deformation activated a more flexible kinking deformation, facilitating slipping and twinning within the kinks. The kink bands evolved into deformation bands with recrystallized nano-grains due to slow heat dissipation and local temperature elevation. This finding provides a new perspective on kinking-facilitated nanocrystallization in Mg alloys and other anisotropic metallic materials.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Nanoscience & Nanotechnology
Jun Wang, Mahmoud Reza Ghandehari Ferdowsi, Peter A. Lynch, Sitarama R. Kada, Matthew R. Barnett
Summary: This study investigates the effects of age hardening on different types of twinning in magnesium alloys, specifically in alloy Mg-6.5Zn with bimodal textures. It was found that tensile twinning is stimulated by precipitates while compression twinning is suppressed by them. This difference is attributed to lower twin surface energy and a larger twinning dislocation Burgers vector in compression twins.
SCRIPTA MATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
Junlei Zhang, Shengjie Han, Yuhong Sun, Xiang Chen, Peng Chen, Zulai Li, Guangsheng Huang, Fusheng Pan
Summary: In this study, three types of WE43 plates with different heat treatments were studied. The microstructure and mechanical properties of these plates were investigated. It was found that the number of precipitates increased as a result of aging after extrusion. The coarse grains and high Schmid factor led to the highest hardness and limited plasticity in the solution-aging after extrusion plates. The T5 plates showed the highest strength due to fine grains and multiple precipitates, while the T6 plates exhibited low ductility because of grain boundary and twin boundary cracking.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Jianyue Zhang, Peng Peng, Alan A. Luo, Jia She, Aitao Tang, Fusheng Pan
Summary: Dynamic precipitation and grain refinement occurred during low temperature extrusion of ZK60 alloy, leading to improved mechanical properties such as tensile strength and elongation. The presence of dynamic precipitates promoted nucleation of new grains and enhanced the alloy's strength and ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
M. Paghandeh, A. Zarei-Hanzaki, H. R. Abedi, Y. Vahidshad, J. Kawalko, D. Dietrich, T. Lampke
Summary: This study investigated the warm temperature deformation behavior of the Ti-6Al-4V alloy through tension and compression tests. It was found that the material exhibited low compressive formability and premature fracture at lower temperatures, while showing increased work hardening capacity in tensile mode. The higher activity of pyramidal slip systems in tensile mode contributed to substructure development and higher strain accommodation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Yang Zhou, Hansong Xue, Jianbo Peng, Haitao Pan, Wei Xie, Song Liu, Dingfei Zhang, Bin Jiang, Fusheng Pan
Summary: In this work, an Mg-8Zn-1Mn-3Sn-1.2Gd-0.2Dy alloy with excellent combination of tensile strength and ductility is successfully prepared. The formation mechanism of Dy-modified MgSnGd phase and its effect on the microstructure and mechanical properties of the alloy are systematically investigated. The addition of Dy promotes dynamic recrystallization and inhibits the growth of MgSnGd phase, resulting in the alloy exhibiting high strength and ductility.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Xiong Wu, Xuerui Jing, Hui Xiao, Sihui Ouyang, Aitao Tang, Peng Peng, Bo Feng, Muhammad Rashad, Jia She, Xianhua Chen, Kaihong Zheng, Fusheng Pan
Summary: The recrystallization behavior of extruded Mg-Zn-Mn alloys under different aging treatment was systematically investigated, revealing the promoting effect of primary coarse particles and the pinning effect of nanoscale particles on recrystallization. The alloy obtained uniform and fine microstructure with good mechanical properties after peak-aged treatment.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
Wenlong Xu, Xianhua Chen, Fusheng Pan
Summary: An investigation was conducted on the microstructure and mechanical anisotropy of Mg-6Zn-xY-0.5Ce-0.4Zr (MZCZ-xY) alloys with varying Y contents subjected to asynchronous rolling (ASR). The addition of Y significantly influences the microstructure and mechanical anisotropy of the alloys. Increasing Y content promotes grain growth in the as-cast state and the activation of tensile twins after ASR treatment. The regulation of mechanical anisotropy in Mg alloys can be achieved by obtaining uniform texture components and uniform Schmid factor (SF) in each loading direction.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Risheng Pei, Yongchun Zou, Muhammad Zubair, Daqing Wei, Talal Al-Samman
Summary: This study investigates the synergistic effect of various alloying elements on the texture and microstructure evolution in magnesium alloys. The results demonstrate that adjusting the precipitation and solute segregation can lead to desired texture modifications.
Article
Chemistry, Physical
T. Nakata, C. Xu, L. Geng, S. Kamado
Summary: This paper reports the application of cold-sample rolling (CSR) processing in a Mg-6Al-1Zn alloy sheet, which resulted in a high fraction of double twins and a substantial texture-weakening effect. Compared to high-temperature rolling (HTR) processing, CSR processing induced a relatively higher texture-weakening effect. The results indicate that twinning-mediated static recrystallization is essential for texture weakening in Al-concentrated Mg-alloy sheets.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
A. Salandari-Rabori, A. Zarei-Hanzaki, S. Asqardoust, H. R. Abedi, T. Krajnak, P. Minarik, Jozef Vesely
Summary: This study presents a new method to obtain recrystallized textures with rare-earth (RE) texture components through post-annealing of accumulative back extruded microstructures. It was observed that annealing at 400 degrees C for 30 min resulted in a homogeneous microstructure with RE texture components formed through precipitation of RE-rich particles and nucleation of new grains. Increasing the annealing time to 240 min (or raising the temperature to 450 degrees C) led to disappearance of the RE texture component and a significant increase in texture intensity.
Article
Materials Science, Multidisciplinary
Javad Charkhchian, Abbas Zarei-Hanzaki, Ali Moshiri, Hamid Reza Abedi, Tim M. Schwarz, Robert Lawitzki, Guido Schmitz, Kanwal Chadha, Clodualdo Aranas, Jiajia Shen, Joao Pedro Oliveira
Summary: In this study, the B2-phase separation and formation of Cr-rich nano-precipitates during the solidification of AlCoCrFeNi2.1 eutectic high-entropy alloy are investigated using advanced characterizations techniques such as high-resolution transmission electron microscopy and atom probe tomography, along with thermodynamic calculations. The as-solidified microstructure consists of face-centered cubic (FCC) dendrites and interdendritic regions comprising a eutectic mixture of FCC and body-centered cubic (BCC) phases. The presence of uniformly distributed Cr-rich nano-precipitates is observed in the interdendritic area through the BCC B2 phase. The formation of these nano-precipitates is attributed to the spinodal decomposition, which occurs when the critical temperature of 800 degrees C is exceeded during the solidification process, facilitated by the formation of a dense dislocation array due to thermal stress.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Mehrad Tahaghoghi, Abbas Zarei-Hanzaki, Behnam Mirshekari, Ali Moshiri, Matias Jaskari, L. Pentti Karjalainen, Hamid Reza Abedi
Summary: This research demonstrates the crucial role of basal slip in the development of substructure during friction stir processing of a magnesium alloy. The activity of different slip systems is identified by examining the intragranular lattice rotation axes. Shear strain applied during the procedure is stored in the matrix through slip-induced rotations at the grain level. Rotations around distinct Taylor axes create slip domains that are separated from the parent grains by necessary boundaries, contributing significantly to grain refinement. Basal slip is easily activated in grains with different stored energy, while nonbasal slip is more dependent on the amount of local applied strain. Determining the contribution of different slip systems in accommodating strain shows that basal slip dominates the fraction of low-angle boundaries in the microstructure, leading to the development of the ultimate grain boundary structure.
ADVANCED ENGINEERING MATERIALS
(2023)
Review
Materials Science, Multidisciplinary
Hedayat Hamdi, Hamid Reza Abedi, Yong Zhang
Summary: Wear resistance is a significant concern in industrial utilization, specifically for mechanically moving and interacting parts. High-entropy alloys (HEAs) have gained attention due to their potential outstanding tribological performance at high temperatures compared to conventional alloys. This study investigates the influence of microstructure, grain size, precipitation, reinforcement, and elements addition on the wear resistance of HEAs across a wide temperature range, analyzing worn microstructure, wear rate, friction coefficient, hardness, wear track, and subsurface. Additionally, the review explores the high-temperature wear resistance of thermally sprayed and additively manufactured HEAs, emphasizing the dominant wear mechanisms at various temperatures.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Zeynab Aalipour, Abbas Zarei-Hanzaki, Ali Moshiri, Daudi Waryoba, Anna Kisko, L. Pentti Karjalainen, Hamid Reza Abedi
Summary: The dynamic and postdynamic recrystallization behaviors of GWZ magnesium were investigated. Hot compression tests were conducted at a strain rate of 0.001 s(-1) and 400°C with prestrains of 0.1 and 0.5 to study the effect of interpass time on compressive strength. The contribution of the Hall-Petch effect was significant at the lower strain level due to static recrystallization, while at higher strains, the strength decreased with increasing interpass time, attributed to grain growth.
ADVANCED ENGINEERING MATERIALS
(2023)
Review
Engineering, Environmental
Amirhossein Farahani, Abbas Zarei-Hanzaki, Hamid Reza Abedi, Sara Daryoush, Zahra Delbari Ragheb, Fatemeh Mianabadi, Sahar Shahparvar, Mohammad Akrami, Ebrahim Mostafavi, Hamideh Khanbareh, Farhad R. Nezami
Summary: As an FDA-approved biopolymer, silk has unique properties that make it suitable for various applications, including sensors, actuators, and drug delivery systems. Understanding its potential uses is important because of its biocompatibility, biodegradability, and piezoelectricity. This article explores the use of silk fibroin in tissue engineering, biosensors, and electro-active wearable bioelectronic applications. It also discusses strategies for improving its hydrophobicity, electrical conductivity, and mechanical properties, particularly in tissue engineering applications.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Materials Science, Multidisciplinary
N. Tabatabaei, A. Zarei-Hanzaki, A. Moshiri, H. R. Abedi
Summary: This study provides a new interpretation of the effect of different heat treatments on the microstructural evolution and deformation behavior of selectively laser-melted AlSi10Mg alloy. It is found that the flow responses of the treated microstructures have not improved as expected, mainly due to the dissolution of the cellular structure and its impact on trapped gas defects. In addition, the melt pool boundaries are prone to crack nucleation and growth, which is attributed to the high connectivity of Si-network and strain localization.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
B. Rozegari Ghashghay, H. R. Abedi, S. G. Shabestari
Summary: This study investigates the grain refinement in the microstructure of selective laser-melted AlSi10Mg alloy. Randomly oriented grains without preferred micro-texture are observed in the printed microstructure. Columnar grains aligned with the building direction have been formed in the molten pool. Refined equiaxed grains with a size of fewer than 10 mm are formed during solidification or dynamic recrystallization.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
A. H. Boluri Gashti, H. R. Abedi, M. T. Salehi
Summary: This study focuses on the semi-solid deformation behavior of A356 aluminum alloys, including microstructure evolution and constitutive modeling. The research starts with investigating the semi-solid deformation behavior of primary dendritic cast structure, instead of using a feedstock prepared through spheroidization process. The findings show that deformation of solid grains in high strain conditions promotes substructure development and dynamic recrystallization in the semisolid temperature range. The penetration of liquid phase along newly developed boundaries also affects the softening behavior of the material. A phenomenological-physical constitutive equation is developed to predict the semisolid flow stress behavior of the material.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Mehrad Roshani, Hamid Reza Abedi, Abdollah Saboori
Summary: The cold, warm, and hot deformation behavior and mechanical properties of Ti-6242 alloy produced by selective laser melting and electron beam melting were compared. The study found that the SLMed specimens had higher yield and overall strength levels compared to the EBMed specimens at all temperatures. The specimens exhibited different fracture and formability performances at different temperatures.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Mehrad Tahaghoghi, Abbas Zarei-Hanzaki, Matias Jaskari, L. Pentti Karjalainen, Peter Minarik, Hamid Reza Abedi
Summary: In this study, AZ31 magnesium matrix nanocomposites reinforced with graphene oxide nanoplatelets were thermomechanically fabricated through friction stir processing. The influence of nanoplatelets on slip/twin activity was investigated. The results showed that the addition of graphene oxide adjusted the substructure characteristics and improved the matrix strength and work hardening rate. Graphene oxide also suppressed extension twinning and improved the overall strength of the nanocomposites.
ADVANCED ENGINEERING MATERIALS
(2023)
Review
Chemistry, Physical
Hedayat Hamdi, Hamid Reza Abedi, Yong Zhang
Summary: The poor performance of advanced engineering materials at high temperature is mainly due to the thermal instability of the microstructures, especially the grain size. High Entropy Alloys (HEAs) have gained attention in both academia and industry as a promising candidate due to their excellent high-temperature resistance and thermal stability compared to conventional alloys. This study focused on investigating the effects of alloying elements, annealing conditions, and pre-treatment on the grain growth behavior of HEAs. The kinetics of grain growth, including the grain growth exponent (n) and the correlated activation energy (Q), were also studied.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
F. Bathaee, A. Zarei-Hanzaki, A. Moshiri, H. R. Abedi
Summary: This study investigates the cyclic deformation behavior of AlSi10Mg alloy fabricated through selective laser melting. The directly aged microstructure exhibited the best fatigue performance with an outstanding balance between fatigue life and strength level. The low aspect ratio of the melt pools intensified the Marangoni effect, leading to crack initiation and the formation of balling defects.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Sahar Shahparvar, Abbas Zarei-Hanzaki, Amirhossein Farahani, Roohollah Bagherzadeh, Hamid Reza Abedi
Summary: This study investigates the production of nanocomposites with an optimal percentage of modified nanoparticles. By applying a suitable thermomechanical process and adding the right percentage of particles, the crystallinity and electrical properties of the nanocomposites can be significantly improved.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Zahra Abbasi, Hamid Reza Abedi
Summary: This study investigates the hot deformation behavior and recrystallization mechanisms of selective laser melted 316L stainless steel. The results show that the development of substructures and continuous recrystallization are the main softening mechanisms during thermomechanical processing. The presence of cellular substructures facilitates recrystallization, and both discontinuous and geometric dynamic recrystallization contribute to the deformation process.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Ahmad Mirzaei, Peter D. Hodgson, Xiang Ma, Vanessa K. Peterson, Ehsan Farabi, Gregory S. Rohrer, Hossein Beladi
Summary: This study investigated the influence of parent austenite grain refinement on the intervariant boundary network in a lath martensitic steel. It found that refining the parent austenite grain led to a decrease in the fraction of certain boundaries in the martensite and an increase in the connectivity of low energy boundaries, ultimately improving the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
N. L. Church, C. E. P. Talbot, L. D. Connor, S. Michalik, N. G. Jones
Summary: Metastable beta Ti alloys based on the Ti-Nb system have attracted attention due to their unique properties. However, the unstable cyclic behavior of these alloys has hindered their widespread industrial use. Recent studies have shown that internal stresses, including those from dislocations, may be responsible for this behavior. This study demonstrates that inter-cycle thermal treatments can mitigate the unstable cyclic behavior, providing a significant breakthrough in our understanding of Ti-Nb superelastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Di Zhao, Chenchen Zhao, Ziyang Xiu, Jiuchun Yan
Summary: This study proposes a novel strategy for achieving the bonding of SiC ceramic and Al alloy using ultrasound. The ultrasound promotes the dissolution of Al into the solder, activating the solder and triggering the interfacial reaction between SiC ceramic and solder. With increasing ultrasonic duration, the bonding between SiC and Al transitions from partial to full metallurgical bonding.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Kang Du, Yang Zhang, Guangda Zhao, Tao Huang, Liyuan Liu, Junpeng Li, Xiyu Wang, Zhongwu Zhang
Summary: This paper systematically investigated the evolution of microstructure in Fe-Ni-Co-Al polycrystalline alloys and its effects on mechanical properties. The results revealed that the migration of grain boundaries in different processes is driven by different factors, which impacts the grain orientation and precipitate formation. In the process of directional recrystallization, grains with specific orientations grow in the grain boundary region and form the dominant orientation, while grains with lower migration rate form the minor orientation. The alloy produced through directional recrystallization exhibited good recoverable strain and superelastic strain, while the alloy produced through solid solution treatment showed no evident superelastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Edohamen Awannegbe, Liang Chen, Yue Zhao, Zhijun Qiu, Huijun Li
Summary: This study employed laser metal deposition to additively manufacture Ti-15Mo wt% alloy, and subsequently subjected it to post-fabrication uniaxial thermomechanical processing. The results showed that different zones in the microstructure remained after processing, and deformation mechanisms mainly involved slip and martensite formation. The compressive mechanical properties were found to be dependent on strain rate, with higher flow stress and compressive strength observed at higher strain rates. Grain structure homogenisation was not achieved, leading to anisotropic tensile properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Reza Khatib Zadeh Davani, Enyinnaya George Ohaeri, Sandeep Yadav, Jerzy A. Szpunar, Jing Su, Michael Gaudet, Muhammad Rashid, Muhammad Arafin
Summary: This research aims to investigate the effect of roughing and finishing reductions on crystallographic texture. The results show significant heterogeneity in the centerline region, with higher intensity of certain textures. Drop Weight Tear Test indicates that steel specimens with lower and medium reductions exhibit superior low-temperature impact toughness compared to steel with higher reductions. The electrochemical hydrogen charging experiments confirm the presence of internal hydrogen cracks only in steel with lower and medium reductions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Flavio De Barbieri, Denis Jorge-Badiola, Rodrigo Allende, Karem Tello, Alfredo Artigas, Franco Perazzo, Henry Jami, Juan Perez Ipina
Summary: This study examines the effect of Cr additions on the mechanical behavior of TWIP steel at temperatures ranging from 25°C to 350°C. The results indicate that different temperature-dependent strengthening mechanisms, including mechanical twinning, Dynamic Strain Aging, and slip bands, are at play. The stacking fault energy (SFE) influences the percentage of mechanical twinning, which in turn affects the strain hardening rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Hanlin Peng, Siming Huang, Ling Hu, Bingbing Luo, Liejun Li, Ian Baker
Summary: This study explores the weldability, microstructures, and mechanical properties of two L1(2)-nanoparticle-strengthened medium-entropy alloys after electron beam welding (EBW). The results show that strong yet ductile defect-free joints were produced, with larger grain sizes in the fusion zones compared to the heat-affected zones and base materials. Both EBWed MEAs exhibited high yield strengths, high ultimate tensile strengths, and good fracture strains at 77 K. The V-doping improved the cryogenic mechanical properties of the TMT MEA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Jong Woo Won, Seulbi Lee, Hye-Jeong Choe, Yong-Taek Hyun, Dong Won Lee, Jeong Hun Lee
Summary: Cold-rolled pure titanium showed improved sheet formability after undergoing cryogenic-deformation treatment. This treatment increased the thinning capability of the titanium and suppressed cracking during sheet forming. The formation of twins during deformation contributed to high thinning capability and increased strength through grain refinement and dislocation accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Handong Li, Lin Su, Lijuan Wang, Yanbin Jiang, Jiahui Long, Gaoyong Lin, Zhu Xiao, Yanlin Jia, Zhou Li
Summary: Homogenization heat treatment is a key procedure in controlling the second phase, enhancing composition uniformity, and workability of as-cast Cu-15Ni-8Sn alloy. This study found that electropulsing treatment (EPT) can significantly reduce treatment temperature and time, improve elongation and overall mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yuxuan Wang, Juntao Zou, Lixing Sun, Yunfei Bai, Zhe Zhang, Junsheng Cheng, Lin Shi, Dazhuo Song, Yihui Jiang, Zhiwei Zhang
Summary: A novel mechanical-heat-electricity synergistic method was proposed to enhance the mechanical properties of Cu-15Sn-0.3Ti alloy by forming annealing twins (ATs). The combination method of Rotary swaging (RS) and Electric pulse treatment (EPT) successfully induced recrystallization and refinement of the microstructure, leading to a significant increase in the strength of the alloy within a short time.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Zhiyi Ding, Jiangtao Xie, Tong Wang, Aiying Chen, Bin Gan, Jinchao Song
Summary: This study demonstrated the Ta-induced strengthening of CoCrNi-AlTi MEAs using nanoscale heterogeneous coherent precipitates. The addition of Ta and aging treatments significantly enhanced the mechanical properties of the alloy, including yield strength, ultimate tensile strength, and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Feng Qin, Feihu Chen, Junhua Hou, Wenjun Lu, Shaohua Chen, Jianjun Li
Summary: Plastic instability in strong multilayered composites is completely suppressed by architecting nanoscale BCC Nb crystalline-amorphous CuNb interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
