Article
Materials Science, Multidisciplinary
Chendong Zhao, Jinshan Li, Yudong Liu, William Yi Wang, Hongchao Kou, Eric Beaugnon, Jun Wang
Summary: This paper investigates the effect of phase transformation on the mechanical and magnetic properties in multi-phase systems, using the AlCoCrFeNi high-entropy alloy as a candidate. Changes in volume fractions of different phases have divergent effects on mechanical and magnetic properties, with the formation of FCC phase positively affecting mechanical properties and the volume fraction of BCC phase playing a major role in determining magnetic properties.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Chendong Zhao, Jinshan Li, Yudong Liu, Xiao Ma, Yujie Jin, William Yi Wang, Hongchao Kou, Jun Wang
Summary: The study investigates the FCC to BCC/B2 phase transformation in AlCoCrFeNi HEA, revealing that increasing heat treatment temperature and duration leads to increased yield strength and saturation magnetization but decreased fracture strain. Optimizing the transformation and size of B2 phases can achieve an excellent combination of mechanical and magnetic properties.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Bo Sun, Jinyong Mo, Qianqian Wang, Yongxiong Chen, Zhibin Zhang, Baolong Shen, Xiubing Liang
Summary: This study investigated the mechanical properties and microstructural evolution of a W 20 Ta 30 Mo 20 C 30 (at.%) refractory high-entropy composite (RHEC). The RHEC exhibited outstanding yield strength at high temperatures and had a complex triple-phase structure. Microstructural investigations showed significant grain refinement after annealing and compression, with different deformation mechanisms identified for each phase. The high-content ceramic phases and structural metastability were found to contribute to the outstanding yield strength at ultrahigh temperatures.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Kaifan Lin, Shih-Che Chen, Hsin-Chih Lin, Hung-Wei Yen
Summary: This study focuses on developing a low-cost medium entropy alloy with desirable mechanical properties. By adjusting the component ratio and adding silicon, a Fe50Mn17.5Cr12.5Co10 Ni5Si5 MEA with a single FCC phase was successfully developed. The processed alloy exhibits improved mechanical properties, with the cryogenic-deformed MEA showing higher yield strength and tensile strength.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Jin Tian, Yake Wu, Tinghui Cao, Jianbo Pang, Xu Zhang, Feng Jiang
Summary: This study investigates the phase evolution in VCoNi medium entropy alloy via tensile deformation at different temperatures and reveals its impact on mechanical behaviors. The results show that diverse phase transitions can be stimulated, and the influence of strain accumulation and Co segregation on phase transformation is discussed.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Farahnaz Haftlang, Alireza Zargaran, Jae Bok Seol, Jongun Moon, Peyman Asghari Rad, Eun Seong Kim, Hyoung Seop Kim
Summary: A novel maraging medium-entropy alloy was designed to achieve high tensile strength and uniform elongation at liquid nitrogen temperature by conducting a short-time martensite-to-austenite reversion treatment and adding needle-like (NiMn)(3-x)Ti-x and elliptical-shaped Ni2SiTi nano-precipitates. The alloy exhibited an ultra-high yield strength of 1.41 GPa and ultimate tensile strength of 1.88 GPa, with a uniform elongation of 14% in the reverted condition. These superior properties were attributed to the transformation-induced plasticity (TRIP)-assisted heterogeneous dual-phase microstructure strengthened by well-distributed nano-precipitates. The metastability-engineering approach can guide the design of TRIP-assisted maraging MEA to overcome the strength-ductility trade-off in extreme environments.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Yu Peng, Jinglong Li, Junmiao Shi, Shiwei Li, Jiangtao Xiong
Summary: TC4 (Ti-6Al-4V) titanium alloy and Al-5(HfNbTiZr) 95 refractory high-entropy alloy were successfully diffusion bonded at a temperature range of 800-1000 degrees C for 60 min under 5 MPa. The microstructure and mechanical properties of the diffusion bonded joints were investigated, revealing a parabolic growth of reaction zones and an increase in shear strength with bonding temperature. A maximum shear strength of 770.06 MPa was achieved at a bonding temperature of 950 degrees C for 60 min under 5 MPa.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Nanoscience & Nanotechnology
Junjie Wang, Ning Zhao, Mengyang Yan, Zongde Kou, Shu Fu, Shangshu Wu, Sinan Liu, Si Lan, Zesheng You, Di Wang, Horst Hahn, Tao Feng
Summary: The strength-plasticity synergy of Al/CoCrFeNi nanocrystalline high-entropy alloy composite was achieved via nanoscale diffusion induced phase transition process. The annealed 16%-Al/CoCrFeNi nc-HEAC exhibited a yield strength of 1338 MPa and elongation of 12.1%, showing a combination of outstanding strength and considerable ductility. This work revealed the synergy of multiple strengthening mechanisms and established a novel phase engineering design strategy for high-performance alloys.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Haofei Sun, Meifeng Li, Hao Zhang, Jing Liu
Summary: The oxidation behavior of FeCrNi medium entropy alloy was investigated through experimental observations and density functional theory (DFT) calculations. The study found that at 900 degrees C, the alloy forms a desirable and continuous oxide layer, while at 1000 degrees C, the oxide layer becomes discontinuous with penetration of oxide. These observations highlight the significant role of phase structure in promoting the formation of protective oxide scales and influencing oxidation resistance.
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
Chemistry, Physical
Z. Y. You, Z. Y. Tang, F. B. Chu, L. Ma, G. F. Guan, H. Ding, R. D. K. Misra
Summary: This study systematically investigated the microstructure and mechanical properties of a tri-phase heterogeneous high-entropy alloy (HEA) under different thermo-mechanical processing. The HEA exhibited a hierarchical microstructure and showed varying mechanical properties depending on the recrystallized fraction. Multiple strengthening mechanisms were activated during deformation, leading to an increase in work hardening rate. The phase distribution and recrystallized grains morphology were characterized, providing insights into the synergy between strength and ductility in HEAs.
Article
Nanoscience & Nanotechnology
Ran Wei, Qiuyu Gao, Xinghua Zhang, Kaisheng Zhang, Lilin Wang, Zhenhua Han, Liangbin Chen, Tan Wang, Chunwen Guo, Fushan Li, Chen Chen
Summary: The emergence of medium-entropy alloys (MEAs) provides new insights for the design of the next generation structural alloys. In this study, Fe60Cr15Ni15Co10-xAlx (x = 0, 3, 5 and 7 at.%) and Fe60Cr15Ni16Al9 MEAs were designed and prepared. The results show that the volume fraction of body-centered-cubic (BCC) phase increases with the increase of Al content, and replacing Co with Al significantly promotes deformation-induced martensitic transformation from the face-centered-cubic (FCC) to BCC phase in these MEAs. The Fe60Cr15Ni16Al9 MEA with dual-phase structure exhibits excellent mechanical properties at room and cryogenic temperatures.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
Dongyue Li, Zhiming Li, Lu Xie, Yong Zhang, Wenrui Wang
Summary: The dual-phase non-equiatomic high-entropy alloy exhibits higher strength and ductility at cryogenic temperatures compared to equiatomic single-phase HEA, with fine-grained structure showing significant advantages over coarse-grained structure due to more extensive displacive transformation. The enhanced transformation behavior is attributed to the reduced stacking fault energy of the material at lower deformation temperatures.
Article
Nanoscience & Nanotechnology
Guangshun Cui, Chen Bao, Mengxue Zhang, Xu Zhang
Summary: In this study, indentation tests were performed on the surface of an interstitial high-entropy alloy to investigate the effects of ultrasonic surface mechanical attrition treatment and thermal aging treatment. The results show that the mechanical behavior of the alloy is significantly influenced by these two treatments. X-ray diffraction and electron backscatter diffraction techniques were used to analyze the changes in microscopic morphology, grain size, phase structure, etc. The study also revealed the microstructure evolution mechanism of the alloy under long-term high temperature conditions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Xiaohong Wang, Yulei Deng, Tengfei Ma, Qiaoyu Li, Duo Dong, Dongdong Zhu
Summary: Due to its nontoxicity and biocompatibility, the beta-type Ti35Zr25Ta15Nb15Sn10 biomedical high entropy alloy (BHEA) has been studied as an advanced biomedical material. However, the strength of the alloy needs improvement. Therefore, this study aimed to explore the feasibility of using ultrahigh-pressure methods to regulate the strength of the alloy.
Article
Materials Science, Multidisciplinary
Hong Zhang, Li-An Zhu, Shu-Xin Bai, Yi-Cong Ye
Summary: An iridium/rhenium (Ir/Re) double-layer coating was prepared on carbon/carbon (C/C) composites, and its morphologies, bond strengths, and ablation resistance were studied. The results demonstrate that the rhenium interlayer significantly enhances the bond strength between the iridium coating and C/C substrate, and the Ir/Re coating exhibits excellent ablation resistance throughout the high-temperature ablation process.
Article
Materials Science, Ceramics
Qiang Chen, Fengyuan Zhao, Jinhao Jia, Changjun Zhu, Shuxin Bai, Yicong Ye
Summary: This study simulated the elastic response and residual stress of ceramic matrix composites using a multiscale approach, predicted effective elastic properties, and compared them with experimental values. The developed micromechanical model showed close agreement with experimental data, validating the reliability of the theoretical model.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Wenjian Guo, Jian Hu, Yicong Ye, Shuxin Bai
Summary: The ablation behavior of high-entropy ceramics (HECs) was investigated using an oxyacetylene flame. By adding SiC particles, the densification and hardness of the ceramics can be improved, and crack deflection was observed. After ablation, various compounds were detected on the surface, and HEC-20SiC showed the lowest mass and line ablation rates. SiC formation and the presence of SiO2 contribute to heat dissipation and pore healing, while the HEC phase effectively inhibits the invasion of reactive oxygen species and metal atoms.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Shun Li, Caimin Huang, Jin Chen, Shuxin Bai, Yu Tang, Xiyue Liu, Yicong Ye, Li'an Zhu, Shiqing Yang
Summary: By forming dispersed Al/MoO3 interfaces, the energy release performance of Al-Ni composites was significantly improved through the co-contribution of intermetallic formation reaction, thermite reaction, and oxidation reaction.
Article
Clinical Neurology
Defang Liu, Rupei Liang, Shuxin Bai, Bo Lan, Guoyong Liu, Debin Wang, Suo Yuan, Wenjie Sun, Guangyu Li
Summary: The study demonstrates that modified electroconvulsive therapy has significant effects on neurometabolites, MRSI signals, and quality of life in patients with refractory obsessive-compulsive disorder. It effectively relieves obsessive-compulsive symptoms, improves overall health scores, and is associated with changes in right brain functional activities.
JOURNAL OF AFFECTIVE DISORDERS
(2022)
Article
Chemistry, Physical
Jinhao Jia, Shuxin Bai, Degan Xiong, Qiang Chen, Cong Li, Minqi Gao
Summary: Alloying Al into porous C-f/SiC composite using pressure-infiltration method enhances the bending strength and reduces ablation rates. Transpiration cooling of aluminum alloy and self-sealing protection of ablation products play crucial roles in anti-ablative properties of the composite.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Jingzhi He, Yating Qiao, Ruixin Wang, Yu Tang, Shun Li, Xiyue Liu, Yicong Ye, Li'an Zhu, Zhen Wang, Shuxin Bai
Summary: A VNbMoTaW refractory high entropy alloy was prepared by mechanical alloying and vacuum hot-pressing sintering to investigate the influence of oxygen. Oxygen played a role in forming Ta-rich oxides, which decreased in grain size and dispersed on the BCC solid solution matrix as sintering temperature increased, leading to an increase in yield strength through Orowan strengthening.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Cong Li, Chunman Zheng, Haolong Jiang, Shuxin Bai, Jinhao Jia
Summary: Aqueous zinc-ion batteries are considered promising for the next generation of functional batteries due to their high safety and environmental performance, yet they suffer from poor cycling stability. By synthesizing Ni-PTA-Mn, an organic metal framework porous material, as the cathode, the batteries displayed high discharge specific capacity and capacity retention, attributed mainly to proton conductivity through H-bond networks formed inside the framework backbone.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Cong Li, Chunman Zheng, Haolong Jiang, Shuxin Bai, Jinhao Jia
Summary: Improving discharge-charge reversibility by enhancing structural stability through in situ growth of MOF-derived V2O3 on carbon cloth has demonstrated high capacity retention and cycling stability. The stable cathode structure and oxygen vacancy defects play a crucial role in achieving high discharge specific capacity.
Article
Materials Science, Multidisciplinary
Ruixin Wang, Yu Tang, Zhifeng Lei, Yuanlin Ai, Zhixing Tong, Shun Li, Yicong Ye, Shuxin Bai
Summary: Refractory high-entropy alloys (HEAs) doped with nitrogen show high strength and ductility properties. The optimal performance is achieved with 0.6% nitrogen doping. Isothermal annealing at different temperatures affects the mechanical properties of the alloys, with slight improvements in both strength and ductility observed at 1000°C due to various strengthening mechanisms.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Jing Wang, Junyu Sun, Taotao Guo, Hao Zhang, Min Xie, Junbo Yang, Xinpeng Jiang, Zengyong Chu, Dongqing Liu, Shuxin Bai
Summary: This study introduces a novel passive daytime radiative cooling strategy and fabricates a flexible hierarchically porous complex membrane with excellent spectral selectivity using a innovative spray-phase-separation strategy. The membrane demonstrates efficient cooling capabilities and economic advantages.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Polymer Science
Wenjian Guo, Shuxin Bai, Yicong Ye
Summary: In this study, the abandoned epoxy resin matrix in composite wastes was pyrolyzed into epoxy resin pyrolytic oil (EPO) and analyzed. The results showed that more than half of the epoxy resin matrix was converted into EPO, mainly consisting of phenol and its derivatives. CF reinforced EPOF composites with comparable strength and ablation rates to CF/PF composites were successfully fabricated, thanks to the good process performance of the EPOF prepolymer.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Chemistry, Physical
Jie Wang, Yu Tang, Shun Li, Zhouran Zhang, Yicong Ye, Li'an Zhu, Shuxin Bai
Summary: The microstructure and mechanical properties of 23 Ti-Zr-Nb-V alloys were investigated to determine the effect of mixing entropy on multicomponent alloys and find the mixing entropy threshold for entropy-tailored materials. The V(Nb)-Zr(Ti) pseudo-binary phase diagrams were established to predict the phases of ternary Ti-Zr-V and Zr-Nb-V alloys. The study revealed that the mechanical properties of entropy-tailored alloys are essentially controlled by Delta S-mix.
Article
Energy & Fuels
Junyu Sun, Jing Wang, Taotao Guo, Hua Bao, Shuxin Bai
Summary: Daytime passive radiative cooling (DPRC) is a cooling method without extra energy consumption, which has gained increasing attention in recent years. By combining disordered media with polymeric photonics, the large-scale preparation of DPRC materials can be realized.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
