Article
Materials Science, Multidisciplinary
Pengfei Gao, Feng Li, Ke An, Zhengzhi Zhao, Xiaohong Chu, Heng Cui
Summary: This study investigates the effect of silicon content on the microstructure and mechanical properties of quenching and partitioning (QP) steel. Adding silicon increases the strength and ductility of the steel, and forming a multiphase structure in QP steel leads to better mechanical properties.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Ilkka Miettunen, Sumit Ghosh, Mahesh C. Somani, Sakari Pallaspuro, Jukka Komi
Summary: Traditional quenching and partitioning (Q&P) treated steels are usually alloyed with silicon (Si) but the exact role of Si in microstructural mechanisms during partitioning process is not fully understood. This study combines dilatometric analysis with detailed microstructural characterization to reveal competing mechanisms during partitioning. Three 0.4 wt.% carbon steels with varying Si contents were quenched and partitioned at different temperatures, showing that Si content affects bainitic transformation, austenite retention, and carbide precipitation. Silicon retards austenite decomposition at higher temperatures but does not improve carbon partitioning at lower temperatures.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Man Liu, Jun Wang, Qi Zhang, Haijiang Hu, Guang Xu
Summary: The study reveals that the optimal mechanical properties of Q&P steels do not necessarily correspond to the highest volume fraction of retained austenite. Quenching at the fine martensite start temperature can achieve a Q&P steel with better elongation at the expense of slightly lower yield strength and tensile strength.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Lisa C. Ehle, Joshua Spille, Heiner Meyer, Jeannine Kaemmler, Jonas Werner, Alexander Schwedt, Jeremy Epp, Thomas E. Weirich, Joachim Mayer
Summary: Stainless steels like X210Cr12 consist of metastable austenite that transforms into martensite under critical conditions. The mechanism and appearance of martensite formation can vary based on mechanical or thermal pathways. Experimental results show that liquid nitrogen cooling results in coarse grained martensite, while deep rolling creates a nanosized microstructure containing both martensite and twins. The highest hardness increase was observed after martensite transformation induced by liquid nitrogen cooling, reaching values up to 950 HV0.1.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
P. K. Kantanen, V. Javaheri, M. C. Somani, D. A. Porter, J. I. Komi
Summary: The study describes the effect of austenite deformation on carbon partitioning and transformation to athermal and isothermal martensite, and bainite during quenching and partitioning (QP). It was found that deformation close to the no-recrystallization temperature refines the grain size, lowers the martensite start temperature and affects the stability of austenite during QP processing. These results can help in designing optimal QP treatments for these novel steels by corroborating the QP microstructures and their hardness through dilatation measurements and retained austenite contents at room temperature.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Xiaohui Lu, Zhihao Yang, Dongsheng Qian, Jian Lan, Lin Hua
Summary: The effect of martensite pre-quenching on the bainite transformation kinetics of GCr15 bearing steel was investigated through dilatometry. The results showed that pre-quenched martensite accelerates the nucleation of subsequent bainite transformation and has advantages in transformation rate and mechanical properties compared to direct bainite austempering.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Nanoscience & Nanotechnology
Shan Chen, Jun Hu, Lingyu Shan, Chenchong Wang, Xianming Zhao, Wei Xu
Summary: Steel treated by quenching and partitioning process shows an excellent combination of strength and ductility by utilizing the transformation-induced plasticity effect of retained austenite. The occurrence of bainitic transformation during the partitioning process significantly influences the microstructure and mechanical properties of the steel, especially on the elongation performance.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Maribel Arribas, Eider Del Molino, Teresa Gutierrez, Artem Arlazarov, David Martin, Daniele De Caro, Sudhindra Ayenampudi, Maria J. Santofimia
Summary: In this study, a medium Mn-Ni steel was treated through Quenching and Partitioning (Q&P) with different quenching temperatures (QT) and partitioning times (Pt) to investigate their influence on the stabilization of austenite and mechanical properties. It was found that the quenching temperature had a significant influence on the results. The Q&P cycle with quenching to room temperature and a high partitioning temperature produced a steel with a high retained austenite (RA) volume fraction and exceptional strength-ductility balance.
Article
Nanoscience & Nanotechnology
Avala Lavakumar, Myeong-heom Park, Reza Gholizadeh, Ranjit Kumar Ray, Mitsuhiro Murayama, Nobuhiro Tsuji
Summary: Low-carbon multi-phased steels with transformation induced plasticity (TRIP) effect have attracted significant attention for automotive applications due to their superior mechanical balance between strength and ductility. However, the complex microstructural evolutions during thermo-mechanical processing and the influence of constituent phases on mechanical properties have not been fully understood. In this study, the formation process of multi-phased microstructures in a low alloy steel during intercritical annealing and subsequent partitioning heat-treatment were systematically investigated. The phase fractions of ferrite, martensite, and retained austenite were found to change significantly with increasing holding time at lower temperature. Newly formed ferrite was observed to transform from austenite through massive or bainitic transformation, resulting in different types of ferrite in the final microstructures. The presence of retained austenite was attributed to interstitial carbon diffusion, leading to improved tensile elongation and TRIP effect during deformation. The best strength-ductility balance was achieved with the shortest heat-treatment at lower temperature.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
P. Kantanen, S. Anttila, P. Karjalainen, R. Latypova, M. Somani, A. Kaijalainen, J. Komi
Summary: The processing conditions to achieve the desired tensile strength and minimum retained austenite fraction in hot-rolled 3-4%Mn medium Mn steels were investigated using quenching and partitioning (QP) and austenite reverse transformation (ART) treatments. The results showed that both processes can achieve relatively high fractions of austenite, with comparable results to those predicted by thermodynamic equilibrium.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Eider Del Molino, Maribel Arribas Telleria, Casey Gilliams, Artem Arlazarov, Javier Jesus Gonzalez, Emmanuel De Moor, John Gordon Speer
Summary: In this study, two medium Mn steels were treated with a quenching and partitioning process to obtain high contents of retained austenite. The addition of Ni effectively stabilized the austenite content. The distribution of Mn and Ni from martensite to austenite was observed. Lower quenching temperature conditions facilitated the enrichment of Mn in the austenite during partitioning.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Hojun Gwon, Sung-Ho Kim, Jong Jin Jeon, Sung-Joon Kim
Summary: The study revealed that after aging at 400 degrees C for 30 minutes, cold-rolled 16Cr-5Ni supermartensitic stainless steel showed a significant increase in yield strength, a decrease in strain hardening rate, delayed martensitic transformation, and redistribution of carbon atoms.
SCRIPTA MATERIALIA
(2021)
Article
Metallurgy & Metallurgical Engineering
Shima Pashangeh, Seyyed Sadegh Ghasemi Banadkouki, Mahesh Chandra Somani, Jukka Komi
Summary: The study investigated residual compressive stresses and dimensional changes in the lattice strains of retained austenite (RA) phase in a high-Si, medium-carbon steel. Results showed that samples treated with Q&B exhibited formation of bainite and high-carbon fresh martensite, while samples treated with DWQ displayed nearly complete martensitic microstructure.
STEEL RESEARCH INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Zeinab Babasafari, Alexey Pan, Farshid Pahlevani, Charlie Kong, Madeleine Du Toit, Rian Dippenaar
Summary: The magnetic properties of high-carbon steels are significantly affected by microstructural features, indicating that magnetic measurements have the potential to be a reliable non-destructive method. The coercive force in martensitic structures decreases with increasing tempering temperature, while in pearlitic structures, the coercivity and remanence increase with interlamellar spacing, and the saturation magnetization decreases.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Saadi A. Habib, Steven P. Mates, Fan Zhang, Mark R. Stoudt, James S. Zuback, Olaf Borkiewicz
Summary: This study systematically investigates the influence of different heat treatments on the volume fraction and stability of retained austenite in AM 17-4N SS, and shows that by altering these factors, the DIMT process can be utilized to vary the strength, work hardening, and ductility, enabling its use in various applications.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Siavash Imanian Ghazanlou, Beitallah Eghbali, Roumen Petrov
Summary: In the present research, Al7075 matrix composites containing carbon nano-tubes (CNTs) and graphene nano-plates (GNPs) processed through accumulative roll bonding (ARB) up to 3 passes. The effect of CNTs and GNPs on microstructural evolution and strengthening mechanisms were investigated, showing that the occurrence of particle stimulated nucleation (PSN) is affected by the type of reinforcement and the number of ARB passes. The most significant strengthening mechanism found is the load transfer mechanism, while the effect of thermal expansion mismatch and Orowan mechanisms is less significant and the Hall-Petch mechanism is negligible.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
S. Dehgahi, H. Pirgazi, M. Sanjari, R. Alaghmandfard, J. Tallon, A. Odeshi, L. Kestens, M. Mohammadi
Summary: The study investigated the dynamic mechanical behavior and texture evolution in maraging steels manufactured using LPBF at different strain rates. Results showed a strong strain rate dependence on the crystallographic texture in as-built samples, while strain rate had no significant effect on texture evolution in heat-treated samples.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Eliseo Hernandez-Duran, Luca Corallo, Tanya Ros-Yanez, Felipe Castro-Cerda, Roumen H. Petrov
Summary: The study shows that multistep thermo-cycling and ultrafast heating strategies can produce similar levels of microstructural refinement, but do not improve mechanical properties significantly. On the other hand, ultrafast heating annealing combined with austempering can enhance ductility without sacrificing strength, achieving the best strength-ductility balance among the studied steels. The outstanding mechanical response exhibited by the ultrafast heating steel is attributed to a heterogeneous distribution of ferrite, bainite, and retained austenite.
Editorial Material
Materials Science, Multidisciplinary
Ilchat Sabirov, Maria J. Santofimia, Roumen H. Petrov
Article
Metallurgy & Metallurgical Engineering
Roberto Iquilio Abarzua, Eliseo Hernandez-Duran, Tuan Nguyen-Minh, Leo A. Kestens, Jose Luis Valin Rivera, Felipe M. Castro Cerda
Summary: This study investigated the influence of microstructure on principal strain paths during the formability processes of ferritic stainless steel AISI 430 sheets. The Marciniak test and digital image correlation technique were used to determine forming limit curves and strain levels, with discussion on formability in relation to microstructure, mechanical properties, work hardening behavior, and anisotropy measurements. The texture evolution was examined using electron backscatter diffraction analysis, showing distinct texture components under different strain modes.
STEEL RESEARCH INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Leo A. Kestens, Tuan Nguyen-Minh, Roumen H. Petrov
Summary: This paper investigates the influence of parent phase topology on the variant selection rule in crystalline materials. It is found that certain grain boundaries in the parent structure exhibit a specific crystallographic orientation relationship with the product phase, known as the Young-Kurdjumow-Sachs (YKS) orientation relationship. The study shows that around 20% of grain boundaries in different parent phase textures comply with the double YKS condition, regardless of the parent phase microstructure topology. The findings of this research provide insight into the formation of specific transformation textures in various practical cases.
Article
Materials Science, Multidisciplinary
Adam Skowronek, Adam Grajcar, Aleksandra Kozlowska, Aleksandra Janik, Mateusz Morawiec, Roumen H. Petrov
Summary: This study investigates the impact of heat-treatment processes on automotive medium-Mn sheet steels. A new method for calculating high-temperature phase equilibrium is developed and validated through experiments. The results show that the intercritical annealing temperature has a significant influence on the microstructure, chemical stability, and mechanical properties of the medium-Mn Al-alloyed steel.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Hao Xiang, Wim Van Paepegem, Leo A. Kestens
Summary: In this study, the Phenomenological Theory of Martensitic Transformation (PTMT) and phase field simulation were used to investigate the martensitic transformation of Ti-6Al-4V alloy. The results showed that mechanical constraints played a crucial role in the microstructure evolution, and the formation of a triangular morphology was favored.
Article
Nanoscience & Nanotechnology
Adam Skowronek, Erick Cordova-Tapia, Pilar Tobajas-Balsera, Carlos Garcia-Mateo, Jose A. Jimenez, Roumen Petrov, Adam Grajcar
Summary: The novel use of double austempering treatments in a multiphase steel has been studied to refine and homogenize the microstructure and improve material strength. The two-step heat treatments effectively reduced blocky-type austenite and fresh martensite while retaining a high volume fraction of retained austenite. The microstructural characteristics, including reduced bainitic plate thickness and film-like retained austenite, led to a significant increase in hardness (50 HV) and yield strength (180 MPa).
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Amke Lescur, Erich Stergar, Jun Lim, Stijn Hertele, Roumen H. Petrov
Summary: Austenitic stainless steels, such as AISI 316L, are widely used in nuclear reactors and their development and characterization is crucial for ensuring structural integrity. The 3D-DIC technique was successfully used to characterize the behavior of multi-pass welds and base materials, providing accurate local strain calculations. The difference in dynamic strain aging effect between the base and weld materials was identified, with the weld materials showing discontinuous type A PLC bands. This technique allows for a better understanding of the local and global behavior of materials.
Article
Nanoscience & Nanotechnology
Alexandros Banis, Andrea Gomez, Vitaliy Bliznuk, Aniruddha Dutta, Ilchat Sabirov, Roumen H. Petrov
Summary: This study investigates the microstructure evolution of a high-strength low-density steel under different aging conditions. The formation and growth of an ordered face-centered cubic L12 phase called x-carbide are characterized qualitatively and quantitatively. The optimal aging condition is determined to achieve a good combination of strength and ductility. Increasing the aging temperature and time leads to the formation of intergranular x-carbides that compromise the hardness and strength of the steel.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Adam Skowronek, Adam Grajcar, Carlos Garcia-Mateo, Jose A. Jimenez, Roumen H. Petrov
Summary: The present study explores the possibility of using continuous annealing approach in Al-alloyed 5Mn steel to optimize the superior mechanical properties in medium-Mn. The microstructural changes as a function of time were followed by dilatometric studies at 680 oC with different soaking times, and thoroughly characterized using various techniques. It was observed that with increasing soaking times, the volume fraction of retained austenite gradually increases, but at the cost of its stability. Mechanical tests results showed a decrease in yield stress, tensile strength and hardness with increasing intercritical annealing soaking time.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Ksenija Nikolic, Jelle De Wispelaere, Gopalakrishnan Ravi, Stijn Hertele, Tom Depover, Kim Verbeken, Roumen H. Petrov
Summary: Damage in bearings is closely related to microstructural alterations, known as white etching areas (WEAs) and white etching cracks (WECs). Non-metallic inclusions, such as manganese sulfides and aluminum oxides, are common in bearing steels. This study classifies 280 non-metallic inclusions according to various criteria and finds that the chemical composition is of secondary importance in damage initiation. The observations suggest that the state of non-metallic inclusion plays a crucial role in initiating rolling contact fatigue damage.
Article
Materials Science, Multidisciplinary
O. Kachko, A. Puype, D. Terentyev, M. Duerrschnabel, M. Klimenkov, R. H. Petrov
Summary: Two RAFM alloys with improved microstructures and mechanical properties were designed and tested, showing higher yield and tensile strength without sacrificing impact toughness. This improvement was achieved through dedicated chemical and thermal treatments, resulting in refined grain and subgrain size and a high density of dislocations. TEM investigation was conducted to quantitatively describe the microstructural parameters and calculate the strengthening contribution of each microstructural feature.
JOURNAL OF NUCLEAR MATERIALS
(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)
