Article
Materials Science, Ceramics
M. Alejandra Mazo, David Soriano, Juan Rubio
Summary: Nano- and micro-indentation experiments were conducted to evaluate the mechanical properties of dense SiOC materials obtained by SPS. The sintering temperature and pressure were varied, and the relationship between mechanical properties and several factors such as densification, porosity, composition evolution, and crystallization was determined. The SiOC sample sintered at 1400 degrees C showed the highest values of hardness and elastic modulus in both indentation tests. The SPS treatment resulted in neat densification without phase separation of the Si-O-C matrix, and the presence of carbon reduced brittleness.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Junho Lee, Kyu-bong Jang, Seokhyun Lee, Chan Bin Mo, Hyo-kyu Kim, Kyoung Ryeol Park, Jongsik Kim, Junghwan Bang, In Chul Jung, Jong Cheol Kim, Sungwook Mhin
Summary: In this study, we developed the MgO-ZrO2-TiC (MSZ-TiC) composite to enhance its mechanical properties. Spark plasma sintering technique was used to increase hardness and titanium carbide was added for improved fracture toughness. The influence of sintering temperature on phase evolution of the composite was investigated and the effects of ZrO2 phase on mechanical properties were discussed.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
P. Yu Nikitin, I. A. Zhukov, A. B. Vorozhtsov
Summary: In this work, AlMgB14-based materials were successfully obtained by spark plasma sintering from an (Al-Mg)-B powder mixture, and their microstructure and properties were investigated. Samples sintered at high temperatures exhibited high hardness, and a mechanism for the decomposition of AlMgB14 during local overheating was proposed.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Ceramics
Behzad Nayebi, Mehdi Shahedi Asl, Maryam Akhlaghi, Zohre Ahmadi, Seyed Ali Tayebifard, Esmaeil Salahi, Mohammadreza Shokouhimehr, Mohsen Mohammadi
Summary: The TiB2-Ti3AlC2 ceramic was successfully manufactured using spark plasma sintering, with Ti3AlC2 additive decomposing at the initial stages of sintering. The final ceramic exhibited a near full density of around 99% and a hardness of approximately 28 GPa, with densification mechanism and sintering phenomena discussed and graphically illustrated.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Chemical
Abbas Sabahi Namini, Seyed Ali Delbari, Nilgun Baydogan, Mohammad Vajdi, Farhad Sadegh Moghanlou, Mehdi Shahedi Asl
Summary: This research evaluated the impact of five nitride additives on TiC-based materials, showing that AlN enhanced relative density while Si3N4 had the most detrimental influence. Besides BN contributing to the finest microstructure, AlN had the greatest effect on thermal conductivity.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Materials Science, Ceramics
Ostap Zgalat-Lozynskyy, I Kud, L. Ieremenko, L. Krushynska, D. Zyatkevych, K. Grinkevych, O. Myslyvchenko, V Danylenko, S. Sokhan, A. Ragulya
Summary: A Si3N4-ZrN wear-resistant self-healing composite material with excellent material properties and self-healing capability has been developed.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Melanie Rousselle, Florence Ansart, Thomas Herisson de Beauvoir, Guillaume Fradet, Claude Estournes
Summary: The study investigates low temperature Spark Plasma Sintering using a hydrated precursor for lanthanum phosphate, achieving dense and nano-scaled microstructures at temperatures ranging from 160 to 350 degrees Celsius.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Engineering, Manufacturing
S. Ram Prakash, G. Selvakumar, K. Rajkumar
Summary: The study found that adding titanium carbide particles to alumina ceramic composites can accelerate sintering kinetics, improve material properties. The sample with 30 weight percent exhibited the highest relative density and hardness, along with superior wear resistance among all composites.
MATERIALS AND MANUFACTURING PROCESSES
(2022)
Article
Materials Science, Ceramics
Zhiyuan Ma, Huichao Cheng, Jinglian Fan, Zhenwei Wang, Zhanggen Liu
Summary: This study aimed to enhance the fracture toughness of Si3N4 ceramics by adding TiC and Mo. The addition of TiC improved the hardness by inhibiting phase transformation and grain refinement. Meanwhile, Mo promoted phase transformation and formed molybdenum silicide, leading to improved fracture toughness. The Si3N4 composites with 8 wt% TiC and 8 wt% Mo exhibited optimal properties.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
C. H. Jeong, E. Vijayakumar, H. G. Lee, W. H. Lee
Summary: In this work, different yttria-stabilized zirconia-titanium (YSZ-Ti) composite compacts were fabricated using electric discharge sintering (EDS) and spark plasma sintering (SPS) methods. The microstructures and mechanical properties of the compacts were analyzed and compared. The results showed that the EDS composite compacts had a uniform distribution of YSZ throughout the Ti matrix, resulting in significantly improved mechanical properties. On the other hand, in the SPS composite compacts, the YSZ content was mainly agglomerated and dispersed at the Ti particle boundaries. The mechanical properties of the SPS compacts were enhanced with increasing YSZ content but not as much as the EDS processed compacts.
CERAMICS INTERNATIONAL
(2022)
Review
Automation & Control Systems
Samson Olaitan Jeje, Mxolisi Brendon Shongwe, Azeez Lawan Rominiyi, Peter Apata Olubambi
Summary: The unique properties of titanium and its alloys have prompted researchers to develop titanium matrix composites for potential applications in extreme environmental conditions. This review discusses the development of titanium matrix composites, fabrication methods, and integration of reported research works, providing a comprehensive understanding of the materials.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
H. Unsal, S. Grasso, A. Kovalcikova, O. Hanzel, M. Tatarkova, I Dlouhy, P. Tatarko
Summary: Homogenous, fully dense samples free of graphene were obtained by using insulating Al2O3 paper during reactive SPS. Isolated SPS had the main advantages of short dwell time (30 s after a degassing step of 6 min) and uniform distribution of fine TiB2 grains over the reactive hot press and SPS processes, respectively.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Adelia Kashimbetova, Karel Slamecka, Sebastian Diaz-de-la-Torre, Jose C. Mendez-Garcia, Bernardo Hernandez-Morales, Maria Cristina Pina-Barba, David Hui, Ladislav Celko, Edgar B. Montufar
Summary: This study systematically investigated the application of pressureless spark plasma sintering (PL-SPS) for fast consolidation of titanium porous structures. The results showed that PL-SPS generated similar sintering conditions to conventional pressure-less sintering, resulting in hierarchical titanium porous structures with equivalent densification, shrinkage, and surface roughness, but minimal grain growth. The use of Poloxamer 407 as a binder and the identification of the lowest possible temperature for thermal elimination were also explored.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Ceramics
Aditya Arun, Kundan Kumar, Anirban Chowdhury
Summary: Consolidating CeO2-doped ZrO2 ceramics, free from monoclinic phase using spark plasma sintering (SPS), has been a major challenge. In this study, dense 20 mol. % CeO2-doped ZrO2 ceramics, free from monoclinic phase and any cracks, were successfully obtained via SPS at the lowest sintering temperature (1175 degrees C) reported so far. The phase analysis showed a mixture of tetragonal and cubic phases.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Peng Yang, Weidong Zhang, Fulin Chen, Zhenggang Wu, Daixiu Wei, Xiaofeng Li
Summary: Ti/beta-Ti laminated composite is widely used in biomedical applications. Densification can be achieved at temperatures above 850 degrees C during fabrication by SPS. The sintering temperature significantly influences the interfacial characteristics, such as increasing the thickness of the interfacial layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Chaoqiang Liu, Xin Hu, Lin Qi, Houwen Chen, Zhiqiao Li, Xiaoyong Zhang, Hongge Yan, Kechao Zhou, Min Song, Yunzhi Wang, Jian-Feng Nie
Summary: Heterogeneous precipitation of the β phase at boundaries within α' martensite and dislocations greatly affects the mechanical properties of α+β titanium alloys. A novel phenomenon was observed in a Ti-4wt%Mo alloy where the β phase selectively precipitates on Mo-segregated twin boundaries within α' martensite. The unique orientation relationship between the β phase and α' is formed due to the similar structure of the twin boundary and Mo segregation, providing a template for β precipitation and potential improvement in mechanical properties.
Article
Engineering, Mechanical
Hao Zhang, Xiaoqin Ou, Song Ni, Hongge Yan, Xiaozhou Liao, Min Song
Summary: The twinning mechanisms in pure Ti, including {11 (2) over bar1} twinning and {11 (2) over bar2}-{11 (2) over bar1} double twinning, are systematically investigated using molecular dynamics simulations. The migration of {11 (2) over bar1} twin boundaries is mainly carried out by the slip of twinning dislocations. Two double twinning mechanisms, involving the formation and growth of {11 (2) over bar1} twin at the {11 (2) over bar2} twin tip, are discovered. The interfacial structures of {11 (2) over bar1} twins exhibit terraced character with short coherent facets and coherent twin boundary segments.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Chemistry, Physical
Xin Hu, Lin Qi, Chaoqiang Liu, Houwen Chen, Xiaoyong Zhang, Hongge Yan, Kechao Zhou, Min Song
Summary: In this study, stacking faults within alpha '' martensite plates were investigated using advanced transmission electron microscopy and first-principles calculations. Two kinds of stacking faults were detected, and their formation mechanism was explained. These findings provide important insights into the martensitic transformation process from bcc-beta to orthorhombic-alpha '' phase.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Zhenmeng Luo, Peibo Du, Zhiguang Guo, Min Song, Bo Li, Zaisheng Cai, Fengyan Ge
Summary: In this study, a novel antisedimentation mechanism was proposed based on the coagulation mechanism of colloids. A stable reciprocal-supporting antisedimentation conductive copper nanowire ink was prepared and a uniform conductive coating was successfully manufactured. This antisedimentation mechanism relied on the tannic acid-polyethylene imine composite cluster to provide spatial potential resistance and modify the surface charge of copper nanowires, resulting in stable dispersion in the network.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Zizheng Song, Ranming Niu, Xiangyuan Cui, Elena V. Bobruk, Maxim Yu. Murashkin, Nariman A. Enikeev, Ji Gu, Min Song, Vijay Bhatia, Simon P. Ringer, Ruslan Z. Valiev, Xiaozhou Liao
Summary: Superplastic deformation of polycrystalline materials is usually achieved by diffusion-assisted grain boundary sliding at high temperatures. Recent research has shown that room-temperature superplasticity can be achieved in ultrafine-grained Al-Zn based alloys, but the underlying mechanism is still unclear. This study utilized in-situ tensile straining, electron microscopy characterization, and atomistic density functional theory simulation to reveal that the superplasticity at room temperature is achieved by grain boundary sliding and grain rotation, facilitated by the continuous diffusion of Zn. The diffusion of Zn atoms from grains to grain boundaries forms a Zn nanolayer, acting as a solid lubricant to lower the energy barrier of grain boundary sliding.
Article
Materials Science, Ceramics
Siwei Luo, Weilin Yu, Min Song, Jianhong Yi, Baisong Guo, Zhentao Yu, Wei Li
Summary: In this study, a uniform and continuous Cr(OH)3 coating was decorated on the surface of carbon nanotubes (CNTs), which was subsequently decomposed into a Cr2O3 transition layer during the fabrication processes for the Cu matrix composite. Precoating Cr(OH)3 on CNTs can promote their dispersion in the Cu matrix and reduce the density difference between CNTs and Cu powders. The formed composite interface structure, with in-situ nanosized Cr carbides (Cr2C3 and Cr23C6), enhances the interfacial bonding and significantly improves the compression yield strength of the bulk composite.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Wentian Chen, Yufan Wu, Lin Guo, Ji Gu, Junyang He, Min Song
Summary: This study investigated the comprehensive effects of carbon doping on the recrystallization process and mechanical performance of the Cantor alloy during mid-temperature annealing. The presence of M23C6 carbides in the early stage of recrystallization accelerates the process by providing nucleation sites. The coarsening and migration of these carbides in the later stage suppresses the overall recrystallization process.
Article
Metallurgy & Metallurgical Engineering
Daifei Wu, Meng Chen, Weichen Mao, Xiaoqin Ou, Min Song
Summary: In this study, transmission electron microscopy and electron channeling contrast imaging combined with electron backscatter diffraction were used to analyze the microstructural evolution and dominant deformation mechanisms of a Fe-13.6Mn-1.2Al-0.6C (wt%) steel during tensile deformation. Due to the multiple-stage strain hardening effect, this alloy exhibits excellent combination of strength and plasticity, with a yield strength, ultimate tensile strength, and elongation of 540 (+/- 30) MPa, 1120 (+/- 70) MPa, and 74 (+/- 3)%, respectively. The early hardening stage is determined by dislocation accumulation and planar slip, while twinning and microbanding dominate the plastic deformation of the steel, resulting in the synergetic effect of twinning-induced plasticity and microband-induced plasticity.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Multidisciplinary Sciences
Pei Zhou, Qinxue Shen, Shiting Zhou, Xiaoli Ouyang, Ting Guo, Min Song, Wei Guo, Yi Zhang, Hong Peng
Summary: This cohort study aimed to identify the characteristics and risk factors of IIM-ILD in adults and explore prognostic factors. They analyzed data from 539 patients with confirmed IIM from January 2016 to December 2021. Results showed that 64.6% of IIM patients had IIM-ILD. Risk factors for IIM-ILD included older age, arthralgia, lung infection, hemoglobin, high CAR, anti-ARS antibody-positive, and anti-MDA5 antibody-positive. High CAR and anti-MDA5 antibody-positive were associated with higher mortality rate in IIM-ILD patients.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Physical
Wenting Jiang, Xinglong An, Canjuan Xiao, Song Ni, Min Song
Summary: The laser powder bed fusion (LPBF) process was used to fabricate a Co25Cr5Mo5W alloy with dense cell boundaries and stacking faults, which exhibited exceptional tensile properties. Heat treatment at different temperatures revealed distinct elemental diffusion behaviors and resulting properties. The 900°C heat-treated specimen showed fine and dense precipitates, enhancing the strength and maintaining ductility, while the 1100°C heat-treated specimen exhibited larger precipitates and reduced strength and ductility. The 900°C heat-treated specimen also exhibited excellent corrosion resistance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Yifu Deng, Hongge Yan, Qiang Li, Jihua Chen, Weijun Xia, Bin Su, Mouxin Wu, Yangbo Yu, Min Song
Summary: A novel thermomechanical treatment based on multi-directional forging is developed to improve the strength and ductility of a low RE content Mg-6.5Gd-1.2Y-0.49Zr alloy. The bimodal grain structure, along with the fine grain size of 0.8 μm and the coarse grain size of 11.6 μm, is prepared after a 4-pass-MDF process, which contributes to the high strength and good ductility of the alloy. The enhanced strength is attributed to the combined effect of aging precipitation of beta' phase and grain refinement, while the good ductility is achieved through the coordination of deformation in the bimodal structure and the activation of <c+a> slip.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Yangbo Yu, Hongge Yan, Huaming Zhu, Jihua Chen, Weijun Xia, Taoyun Liang, Bin Su, Min Song
Summary: This study investigates the hot deformation behavior and microstructure evolution of TC17 alloy with lamellar and beta treated starting microstructures under stepped strain rate (20 s1 + 0.1 s1, 20 s1 + 1 s1, and 20 s1 + 10 s1) hot compression at 840 degrees C. The results show that the alloy with two microstructures exhibited similar flow curves, but the lamellar sample displayed more flow softening during the second compression stage with a strain rate of 10 s1. Adiabatic shearing bands with coarsened beta grains were formed in the compressed lamellar alloy, and a high dislocation density was observed at grain boundaries. The microstructure evolution after 60% compression was dominated by dynamic recovery, except for the lamellar alloy with a stepped strain rate of 1 s1, which underwent dramatic dynamic recrystallization. The precipitation of dot/lath-like << was achieved in both the 60% compressed alloys, and it was promoted by a higher stepped strain rate.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Weijin Cai, Junyang He, Li Wang, Wenchao Yang, Xiangqi Xu, Khurram Yaqoob, Zhangwei Wang, Min Song
Summary: This study investigates the chemical short-range order (CSRO) in VCoNi medium-entropy alloy (MEA) processed by spark plasma sintering (SPS) and hot-rolling (HR). The SPS-HRed MEA exhibits a sharp increase in strength compared to the cast counterpart, attributed to the presence of dislocations, stacking faults, nano-twins, and V-oxide particles. Despite differences in microstructure and thermal routes, the CSRO in the SPS-HRed MEA shows a similar L11-type structure motif and sub-nanometer size. The preference of V-Co and avoidance of V-V pairs are observed, while the preference of V-Ni pair disappears due to the varying matrix composition.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Coatings & Films
Lei Yu, Wenting Jiang, Xinglong An, Song Ni, Guowei Bo, Wei Li, Min Song
Summary: This study explores the combination of aluminizing and laser shock peening (LSP) techniques on AISI 321 stainless steel to enhance its mechanical properties. The aluminized steel forms a three-layer protective coating with decreasing aluminum concentration. LSP treatment introduces a dislocation density gradient, dislocation-precipitate interactions, and compressive stress. The aluminizing + LSP processed steel exhibits significant improvement in high temperature tensile properties compared to the as received 321 steel.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Chemistry, Physical
Kai Li, Yan Yu, Qiang Lu, Yuanfei Li, Qiao Yan, Xinyue Lan, Liya Li, Baishan Chen, Min Song
Summary: This study reveals the chemical evolution and mechanical behavior of quaternary micro-scale Q constituent phase in the cast and homogenized states through micro-to-atomic scale studies. These findings provide a basis for the future design of alloys with better performance.
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)
