Article
Chemistry, Physical
Zhongsheng Yang, Zhijun Wang, Bojing Guo, Rongtian Cao, Qingfeng Wu, Dingcong Cui, Kaiwei Zhang, Junjie Li, Jincheng Wang, Feng He
Summary: This study investigated the effects of pre-strain degree on the precipitation behavior of Ni2CoCrFeTi0.18Al0.12 high-entropy alloys. The results revealed a non-monotonous effect of pre-strain on the precipitation behavior, where low pre-strain can accelerate the precipitation while high pre-strain weakens this effect. Additionally, pre-strain can control the precipitation strengthening, dislocation strengthening, and grain boundary strengthening of high-entropy alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Guanghui Yang, Jin-Kyung Kim
Summary: The annealing time-dependence microstructures and deformation mechanisms of the novel face-centered cubic Fe49.5Mn30Co10Cr10C0.2Ti0.1V0.1 Mou HEA are reported in this study. Three types of precipitates, sigma-phase, Cr-rich MC-type carbides, and nano-scale (Ti, V, Mo)C, are present after cold-rolling and annealing. The hierarchical precipitates can lead to sluggish recrystallization and grain growth. The deformation mechanisms change with annealing time, with dislocation glide, deformation twinning, and deformation-induced epsilon phase observed for short annealing times, and a more complex transformation for longer annealing times. The material annealed for 10 hours shows superior strain hardening capacity and strength-ductility combination.
Article
Chemistry, Physical
Danni Yang, Yong Liu, Nan Qu, Tianyi Han, Mingqing Liao, Zhonghong Lai, Jingchuan Zhu
Summary: The effect of fabrication methods on microstructures, mechanical properties, and strengthening mechanisms of high-entropy alloys was systematically studied. Different fabrication methods have little effect on the main phase compositions of Fe0.25CrNiAl MEA, but significant impacts on microstructures, mechanical properties, and strengthening mechanisms were observed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Xiaofeng Fan, Rui Li, Xingshuo Liu, Qingqi Liu, Xue Tong, Aoxiang Li, Shu Xu, Hao Yang, Pengfei Yu, Gong Li
Summary: This study presents the design of a novel non-equiatomic medium-entropy alloy with heterogeneous grain structures and dual-morphology nano-precipitates. The material exhibits high yield strength and ductility, mainly attributed to precipitation strengthening and hetero-deformation induced strengthening.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Review
Chemistry, Multidisciplinary
Jinmei Chen, Xiaosong Jiang, Hongliang Sun, Zhenyi Shao, Yongjian Fang, Rui Shu
Summary: High-entropy alloys (HEAs) have gained attention for their excellent performance in aerospace, ultrahigh temperature, high-performance, and biomimetic materials. Current research on HEAs focuses on microstructure and mechanical properties, with the emergence of medium-entropy alloys, metastable HEAs, dual-phase HEAs, and multiphase HEAs adding complexity to the system.
NANOTECHNOLOGY REVIEWS
(2021)
Article
Nanoscience & Nanotechnology
Yijie Bian, Ruicheng Wang, Fan Yang, Puhao Li, Yicheng Song, Jiemin Feng, Wenwang Wu, Ziyong Li, Yang Lu
Summary: In this paper, novel multiphase heterogeneous lattice materials are developed using the precipitation strengthening mechanism in metal metallurgy. By utilizing the hindering effect of second-phase lattice cells on shear band propagation, the mechanical properties of the materials are enhanced. Different from conventional random distribution, second-phase and third-phase cells are continuously distributed along the regular pattern of a larger-scale lattice to form internal hierarchical lattice structures. The results show that the triphase lattices possess balanced mechanical properties and introducing a relatively weak phase can improve stiffness and plateau stress, contrary to the common mixed rule.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Kanghyun Park, Soon Jik Hong, Sung Ho Song, Sung Hwan Hong, Ki Buem Kim, Junhee Han, Kyoung-Tae Park, Chanho Lee, Peter K. Liaw, Gian Song
Summary: Ferritic steels are increasingly being considered as an ideal material for high temperature applications due to high thermal conductivity, low thermal expansion coefficient, and cost efficiency. The addition of Laves phases has been shown to enhance the mechanical properties of ferritic alloys, particularly at room temperature and 973K.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Yufang Zhao, Yaqiang Wang, Kai Wu, Jinyu Zhang, Gang Liu, Jun Sun
Summary: Introducing heterogeneous interfaces by constructing laminated structure is a promising approach to achieve controllable strengthening behavior of high entropy alloys. In this study, the microstructural evolution and mechanical properties of Ni/Fe50Mn30Co10Ni10 nanolaminates were systematically investigated. The nanoindentation hardness of the nanolaminates initially increased and then decreased with decreasing layer thickness, reaching a maximum value at around 25 nm. The transformation of constraining barrier for dislocation slipping from the heterogeneous interfaces to columnar grain boundaries was identified as the cause for this behavior. The interfacial structure transformed from incoherent to completely coherent below 25 nm, and both constituent layers contributed significantly to the plastic deformation. The h-dependent mechanical behavior can be explained by the co-deformation of constituent layers and the structural evolution of the interface.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Xinran Zhou, Xinyi Wang, Lauren Fey, Sicong He, Irene Beyerlein, Penghui Cao, Jaime Marian
Summary: The mechanical response of complex concentrated alloys deviates from that of pure metals and dilute alloys due to the introduction of chemical concentration dimension. Compositional fluctuations constantly alter the energy landscape over which dislocations move, leading to the appearance of defects and fundamentally changing the plastic deformation of CCAs. This article reviews recent advances in modeling dislocation glide processes in CCAs and discusses pathways to develop comprehensive simulation methodologies for improved design of CCAs with superior mechanical response.
Review
Materials Science, Multidisciplinary
Naqash Ali, Liqiang Zhang, Dongming Liu, Hongwei Zhou, Kiran Sanaullah, Chaojie Zhang, Jianhua Chu, Yi Nian, Jinjun Cheng
Summary: High entropy alloys (HEAs) have emerged as a potential candidate for industrial applications due to their excellent mechanical properties at various temperatures. However, the trade-off between strength and ductility in HEAs requires modifications in conventional strengthening mechanisms such as adjusting stacking fault energy and promoting twin formation and phase transformation.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
L. Lu, Q. W. Xia, F. Zhao, J. C. Shi, S. N. Luo, Y. Cai
Summary: By applying high strain-rate plastic deformation treatment using gas gun loading, the mechanical properties of a titanium alloy were modified, resulting in the specimen shocked at 609 m/s exhibiting the best strength-toughness tradeoff.
Article
Chemistry, Physical
Yiyu Huang, Wenshu Li, Ruoyu Liu, Haoyu Chen, Qi Wu, Shaohong Wei, Bin Liu, Peter K. Liaw, Bingfeng Wang
Summary: The dynamic mechanical properties of the SLM-NiCrFeCoMo0.2 HEA are improved by controlling the molten pool structure and the generation of sigma-phase precipitation particles. After heat treatment and quenching, the compressive strength and impact energy of the specimens are increased. The precipitates play a key role in strengthening the HEA.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Chemical
Yake Xiao, Xianghe Peng, Tao Fu
Summary: This paper presents a novel high-entropy alloy with a heterogeneous microstructure containing multi-scale precipitates. The alloy exhibits excellent mechanical properties, surpassing those of most similar alloys prepared by powder metallurgy. It shows great promise for engineering applications.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Nairan Wang, Zongqi Xiao, Shengyuan Li, Hao Wu, Zhuangzhuang Liu, Yan Wang
Summary: In this study, novel Ni-based composites were prepared by adding (CoCrFeNiMn)90Hf10 amorphous high-entropy alloys (AHEAs) into pure Ni powder and using spark plasma sintering (SPS). The in-situ nanoscale reinforcements with different formation mechanisms, distribution sizes, and existing regions were obtained in the Ni matrix during SPS, leading to the formation of hierarchical nanoprecipitates and reinforcement units. The 20 vol% AHEA/Ni-based composite exhibited significant improvement in strength and ductility synergy compared to pure Ni bulk, with optimal yield strength, ultimate tensile strength, and elongation values of 358 MPa, 561 MPa, and 24.1% respectively. The different types of in-situ hierarchical nanoscale precipitates in the Ni matrix showed unique pinning behaviors for various defect forms.
MATERIALS & DESIGN
(2023)
Article
Nanoscience & Nanotechnology
Shuzhi Zhang, Zhiyuan Jia, Guangxu Zhao, Jing Zhang, Jianchao Han, Changjiang Zhang, Fantao Kong
Summary: High entropy alloys are ideal structural materials with excellent mechanical properties. A novel L12 precipitation strengthened medium entropy alloy is designed, which exhibits a yield strength of 1.09 GPa, an ultimate tensile strength of 1.5 GPa, and nearly 20% elongation at room temperature. However, the fully recrystallized as-aged alloy has poor plasticity at high temperature, while the non-recrystallized alloy directly aged after rolling shows excellent high temperature mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
P. Thirathipviwat, G. Song, J. Jayaraj, J. Bednarcik, H. Wendrock, T. Gemming, J. Freudenberger, K. Nielsch, J. Han
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Materials Science, Multidisciplinary
Konrad Kosiba, Andre Rothkirch, Junhee Han, Liang Deng, Benjamin Escher, Gang Wang, Uta Kuehn, Jozef Bednarcik
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
(2020)
Article
Materials Science, Multidisciplinary
P. Thirathipviwat, G. Song, J. Bednarcik, U. Kuehn, T. Gemming, K. Nielsch, J. Han
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
(2020)
Article
Chemistry, Multidisciplinary
Mihai Stoica, Baran Sarac, Florian Spieckermann, Jonathan Wright, Christoph Gammer, Junhee Han, Petre F. Gostin, Juergen Eckert, Joerg F. Loeffler
Summary: The study demonstrates that X-ray diffraction computed nanotomography can provide accurate details of the internal structure of metallic glasses, which is of great significance for the research of metallic materials at the nanoscale.
Article
Chemistry, Physical
Kanghyun Park, Soon Jik Hong, Sung Ho Song, Sung Hwan Hong, Ki Buem Kim, Junhee Han, Kyoung-Tae Park, Chanho Lee, Peter K. Liaw, Gian Song
Summary: Ferritic steels are increasingly being considered as an ideal material for high temperature applications due to high thermal conductivity, low thermal expansion coefficient, and cost efficiency. The addition of Laves phases has been shown to enhance the mechanical properties of ferritic alloys, particularly at room temperature and 973K.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Ju Wang, Ivan Kaban, Volodymyr Levytskyi, Ran Li, Junhee Han, Mihai Stoica, Roman Gumeniuk, Kornelius Nielsch
Summary: Co-Ta-B bulk metallic glasses exhibit a good combination of ultra-high fracture strength, Vickers hardness, and plastic strain. The crystallization process reveals the formation of a novel crystalline phase upon glass annealing.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Kangjin Lee, Yunjong Jung, Junhee Han, Sung Hwan Hong, Ki Buem Kim, Peter K. Liaw, Chanho Lee, Gian Song
Summary: Single-phase solid-solution refractory high-entropy alloys have attracted attention for their excellent mechanical properties and phase stability at elevated temperatures. By adding Ni or Co to Al0.8NbTiV HEA, precipitation-hardened lightweight RHEAs with homogeneous distribution of sigma precipitates were successfully developed, showing superior specific yield strength compared to other RHEA alloys and a conventional Ni-based superalloy at high temperatures.
Article
Nanoscience & Nanotechnology
P. Thirathipviwat, S. Sato, G. Song, J. Bednarcik, K. Nielsch, J. Han
Summary: Studies on high entropy alloys (HEAs) have found that the interactions between constituent elements do not lead to severe lattice distortion, indicating that the high compositional complexity of HEAs may not have a strong effect on lattice strain and solid solution hardening.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Pramote Thirathipviwat, Yusuke Onuki, Gian Song, Junhee Han, Shigeo Sato
Summary: The CoCrFeMnNi high entropy alloy shows large work strengthening and excellent deformability due to dislocation activities and accumulation. The study uses neutron line profile analysis and EBSD to compare the dislocation density and microstructure of CoCrFeMnNi HEA with a binary FeNi alloy, finding differences in dislocation activities and accumulation. The larger work strengthening in CoCrFeMnNi HEA is correlated with a continuously increasing dislocation density during cold swaging.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Pramote Thirathipviwat, Shigeo Sato, Gian Song, Jozef Bednarcik, Kornelius Nielsch, Juree Jung, Junhee Han
Summary: Chemical compositions in the TiNbHfTaZr HEA system were found to have significant effects on lattice distortion and solid solution strengthening, with lattice distortion levels being proportional to atomic size misfit.
SCRIPTA MATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
A-Young Lee, Ki Hoon Kang, Hyungju Ahn, Jun Hee Han, Min-Ha Lee, Jong-Woo Kim
Summary: This study investigates the improvement of magnetocaloric properties in MnFeHfPSi alloys by Ge doping and magnetocrystalline anisotropy. The maximum magnetic entropy change increases in alloys with higher magnetocrystalline anisotropy, which is attributed to the fractions of easy and hard magnetization planes. Moreover, the magnetocaloric properties exhibit significant differences depending on the direction between the easy magnetization plane and the applied magnetic field. The presence of an easy magnetization plane is crucial for enhancing magnetocaloric properties.
Article
Materials Science, Multidisciplinary
A-Young Lee, Min-Ha Lee, Song-Yi Kim, JunHee Han, Ki-Hoon Kang, Jong-Woo Kim
Summary: This study investigated the effect of Ge content on phase transitions and magnetocaloric properties in MnFeCoPSiGe alloys. It was found that increasing Ge content decreased the magnetic entropy change, but the morphological variation of microstructure in the Ge-rich matrix increased the magnetic entropy change. Therefore, controlling the secondary phases and morphology is crucial for improving phase transitions and magnetocaloric properties.
Article
Chemistry, Physical
Konrad Kosiba, Denys Y. Kononenko, Dmitry Chernyavsky, Liang Deng, Jozef Bednarcik, Junhee Han, Jeroen van den Brink, Hwi Jun Kim, Sergio Scudino
Summary: Due to layer-by-layer processing, laser powder bed fusion (LPBF) can overcome the size limitation of bulk metallic glasses (BMGs) caused by high cooling rates. However, fabricating amorphous and highly dense parts via LPBF is challenging because the processing parameters affect both requirements in a contrasting manner. In this study, specimens of the glass-forming Zr52.5Cu17.9Ni14.6Al10Ti5 alloy were fabricated using LPBF under varying processing conditions. Processing maps of amorphicity and density were provided and evaluated in terms of porosity, structural relaxation, and crystallization. Optimal processing conditions for maximizing density and amorphicity were identified. The dataset helps quantify the correlation between relative density, amorphicity, volumetric energy density, and normalized enthalpy criteria. Pearson and Spearman correlation analyses revealed an equally strong dependence between these criteria and relative density, and an inverse moderate dependence with amorphicity. A modified enthalpy criterion, which correlates strongest with density among the non-dimensional parameters, was derived based on the results.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Dmitry Chernyavsky, Denys Y. Kononenko, Jun Hee Han, Hwi Jun Kim, Jeroen van den Brink, Konrad Kosiba
Summary: Additive manufacturing (AM) is a versatile technology for fabricating complex parts and synthesizing materials with desired microstructures and properties. However, controlling the manufacturing process to meet specifications is challenging due to a large number of processing parameters. Efficient predictive machine learning models, such as the heteroscedastic Gaussian process (HGP) model, can minimize cost and assess the quality of the dataset with uncertainty, thus improving additive manufacturing processes.
MATERIALS & DESIGN
(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)
