Article
Materials Science, Multidisciplinary
Ling Qiao, R. Ramanujan, Jingchuan Zhu
Summary: The microstructure and tensile deformation behavior of a Fe2.5Ni2.5CrAl multi-principal element alloy (MPEA) were studied. The combination of soft FCC phase and hard BCC + B2 microconstituent resulted in high strength and ductility. The stress-strain relationship obtained from nano-indentation tests matched well with the tensile stress-strain curves. The fracture surface indicated ductile fracture with cracks forming at the interfaces and expanding along the voids. The presence of dislocations and deformation twinning contributed to the excellent properties. Second phase strengthening played a significant role in increasing strength. MD simulations revealed the formation of HCP structure and stacking faults, with Shockley dislocations being the key factor in deformation behavior. This study demonstrates the potential of the Fe2.5Ni2.5CrAl MPEA for various industrial applications with its superior strength-ductility combination.
MATERIALS & DESIGN
(2023)
Article
Chemistry, Physical
Tong Liu, Ruirun Chen, Xuefeng Gao, Hongze Fang, Gang Qin, Yanqing Su, Jingjie Guo
Summary: By investigating the AlxCo4Cr1.5Fe1.5Ni5 alloys, the phase formation and strengthening mechanisms were revealed. The microstructure of the alloy changes from single FCC phases to FCC and BCC phases with the increase of aluminum content, which is consistent with the predicted phase diagram. The tensile strength of the alloy is attributed to interface strengthening and solid solution strengthening. The study provides insights into optimizing the microstructure and mechanical properties of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
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
Chemistry, Physical
Hansung Lee, Ashutosh Sharma, Byungmin Ahn
Summary: This study investigates the influence of Si addition on the microstructure, compressive strength, and fracture mechanisms of FeCoNiAlSi high-entropy alloys (HEAs). The results show that the addition of Si changes the phase structure of the alloy and increases its Vickers hardness and compressive strength. The findings suggest that HEAs with different Si contents can be used for designing high-strength structural alloys for automotive applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Xicong Ye, Zihao Cheng, Chang Liu, Xin Wu, Luer Yu, Mengyu Liu, Dong Fang, Guangwei Zhao, Bo Li
Summary: The emergence of eutectic high entropy alloys (EHEAs) has led to the design and preparation of a set of low-cost Co-free Fe55Cr15Ni(30-x)Nbx (x = 0, 3, 6, 9, 12, and 15 at.%) EHEAs in this study. The addition of Nb content affects the solidification structure and mechanical properties of the alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Xuefeng Gao, Tong Liu, Gang Qin, Hao Ren, Xu Yang, Yao Chen, Qin Xu, Ruirun Chen
Summary: In this study, fine and disordered precipitated phases were obtained by annealing treatment in a Co30Cr30Fe17Ni17Mo6 high entropy alloy. The size of the secondary sigma phase increased with the increase of annealing temperature. The as-annealed alloy showed high yield strength at room temperature and maintained applicable ductility. At low temperature, the alloy exhibited strength-ductility synergy after specific annealing treatment.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Youyou Zhang, Huibin Wu, Xinpan Yu, Di Tang, Rui Yuan, Hui Sun
Summary: In this study, the microstructure and mechanical properties of CrxMnFeNi high-entropy alloy were investigated. It was found that a dual-phase FCC/BCC structure was formed when the Cr content exceeded a threshold value. The presence of BCC phase in the dual-phase alloy significantly increased strength but decreased ductility, showing a good strength-ductility matching mechanism.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
T. S. Orlova, T. A. Latynina, M. Y. Murashkin, F. Chabanais, L. Rigutti, W. Lefebvre
Summary: The paper investigates the effect of high pressure torsion on the microstructure, mechanical properties, and electrical conductivity of Al-0.53Mg-0.27Zr alloy preliminarily aged at T = 375 degrees C for 366 h. It was found that HPT processing leads to a significant increase in strength and good electrical conductivity and ductility in the alloy. The study also highlights the key role of Mg alloying elements in strengthening the material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Liu Yang, Xiaosong Jiang, Hongliang Sun, Yali Zhang, Yongjian Fang, Rui Shu
Summary: The Cu-11Al-3Ni-2.5Mn-1Y alloy was subjected to aging treatment at different temperatures, and its phase composition, microstructure, mechanical, and damping properties were characterized. The alloy showed a combination of 18 R martensite and 2 H martensite after aging treatment, with the best properties obtained at 450 degrees C. The strengthening mechanisms involved lattice distortion, dislocation increment effect, shearing and hindering effect of precipitated phases and dislocations, fine grain strengthening effect, and an increase in large angle grain boundary.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Kaiguang Luo, Shilei Liu, Hanqing Xiong, Yun Zhang, Charlie Kong, Hailiang Yu
Summary: The effect of different mass fractions of HEAp on the microstructure and mechanical properties of AMCs was studied, and it was found that AMCs containing 3% HEAp exhibited the best mechanical properties. The fracture mechanism changed with increasing HEAp content.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Yindong Shi, Wei Shang, Xiliang Zhang, Shunxing Liang, Shaoyuan Li, Wenquan Chen, Hongji Liu, Dong Xu, Xiaoyan Liu, Guoqiang Lv, Shuai Wang, Tonglai Guo, Zheng Lv, Zhenguo Xing
Summary: The tensile and impact properties of gradient-structured low-alloying steel were studied, and a strength-ductility synergy was achieved through the gradient structures. Continuous work hardening and sustained accumulation of GNDs contribute to the exceptional strength-toughness combination.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Jianbo Jia, Zhigang Yang, Bo Xu, Wentao Xie, Yan Xu, Junting Luo, Qiang Wang
Summary: In this study, a corrugated constrained groove pressing (CCGP) technology based on a semicircle groove was utilized to improve the uniformity of strain accumulation in deformed metal sheets. The effects of strain route and deformation pass on the microstructure evolution and mechanical properties of the CCGPed alloy were investigated. Results showed that the CCGPed sheet exhibited improved strength and hardness, but reduced ductility. Cross-CCGP was effective in alleviating the anisotropy of the deformed sheet and achieving optimal strength in different directions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Hongchao Li, Jun Wang, Haoxue Yang, Mengmeng Zhao, William Yi Wang, Ruihao Yuan, Jinshan Li
Summary: This study investigated the effect of thermomechanical treatments on the mechanical properties of high-entropy alloy Al0.5CoCrFeNi. The results showed that the nanoscale B2 phases formed through aging significantly enhanced the strength of the alloy, and pre-deformation facilitated the formation of B2 phases and further improved the strength of the alloy.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Yuankui Cao, Na Li, Yaofeng Luo, Hanchun Tang, Qian Xie, Ao Fu
Summary: A novel Ti-3Al-5V-5Mo alloy with hierarchical submicron alpha precipitates and nanoscale alpha' precipitates was developed, which exhibited an ultra-high tensile strength of 1585 MPa and moderate plasticity.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(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.
