Article
Materials Science, Multidisciplinary
Yijie Ban, Yongfeng Geng, Jinrui Hou, Yi Zhang, Meng Zhou, Yanlin Jia, Baohong Tian, Yong Liu, Xu Li, Alex A. Volinsky
Summary: A novel Cu alloy with high strength and electrical conductivity was designed in this study, and excellent properties were obtained after aging. The high strength and conductivity of the alloy are mainly attributed to the nano-precipitates and the fine and uniformly distributed nano precipitates. The increase in elongation is mainly attributed to the formation of deformation twins and the small lattice mismatch strain at the coherent interfaces of precipitates and the Cu matrix.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Ao Fu, Yuankui Cao, Zhonghao Xie, Jian Wang, Bin Liu
Summary: A novel non-equiatomic high entropy alloy (HEA) Al15.85Fe11.15Co32.11Cr10.76Ni30.13 was fabricated using a powder metallurgy method. The HEA exhibits a dual-phase microstructure consisting of face-centered-cubic (FCC) and body-center cubic (BCC) phases. It possesses high compressive yield strength, fracture strength, fracture strain, and strength at high temperature due to the uniform dispersion of L12 and B2 nanoprecipitates in the FCC and BCC phases, respectively. This finding provides guidance for the development of high-performance structural materials with a balance of strength and ductility for industrial applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Zofia Kula, Michael Semenov, Leszek Klimek
Summary: The study shows that carbon coatings applied on prosthodontic alloy Ni-Cr exhibit good mechanical properties and corrosion resistance, effectively reducing bacterial adhesion on surfaces.
APPLIED SCIENCES-BASEL
(2021)
Article
Physics, Applied
Y. Takeda, G. Nishijima, U. Nakai, T. Motoki, J. Shimoyama, H. Kitaguchi
Summary: This study systematically evaluates the angular dependence of resistance and critical current of a Bi-2223 superconducting joint in a closed-loop sample using a joint resistance evaluation system. The results show that the resistance and critical current of the joint depend on the angle of the magnetic field, and exhibit different characteristics in different angle ranges.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Applied
Run Wu, Liyuan Liu, Xinbo Hu, Xinsheng Yang, Jian Liu, Yunpeng Zhu, Lijun Cai
Summary: The alloy-reinforced Bi-2223 composite tapes require suitable analytical methods and equivalent models to analyze their equivalent mechanical properties due to their complex structure. By using different simplified models, it has been found that the single-filament elliptical model reduces computation time and deviation from experimental results, and the details of the geometry in the models have little effect on the results. The results of the mixture rule method are also in agreement with experimental results, demonstrating the feasibility of using the mixture rule method and single-filament elliptical model for mechanical analysis of alloy-reinforced Bi-2223 tapes.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2023)
Article
Engineering, Electrical & Electronic
Xiaobo Ma, Shengnan Zhang, Jianqing Feng, Chengshan Li, Botao Shao, Jianfeng Li
Summary: Mono-filament Bi-2223/Ag and Bi-2223/AgAu tapes were fabricated using the power-in tube technique. The formation temperature and content of Bi-2223 phase in the tapes were analyzed. The growth process of Bi-2223 grains during the sintering process was quantitatively studied, and it was found that the growth rate in the length direction was higher than in the thickness direction. The results provided important insights for understanding the growth of Bi-2223 phase and improving the current-carrying property of the tapes.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Lin Yuan, Jiangtao Xiong, Jin Ren, Yajie Du, Jinglong Li
Summary: A filler metal of Mn-Ni-Cr was used for transient liquid phase (TLP) bonding of FeCoNiTiAl high-entropy alloy and Ni3Al base IC10 superalloy, resulting in the formation of two isothermally solidified zones (ISZs) and an athermally solidified zone (ASZ). The absence of conventional melting-point depressants (MDPs) in the filler material prevented the formation of a diffusion affected zone (DAZ) in the bonded zone.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Breno Henrique da Silva Andrade, Gabriely Medeiros de Souza Falcao, Ieverton Caiandre Andrade Brito, Rafael Evaristo Caluete, Rodinei Medeiros Gomes, Danniel Ferreira de Oliveira
Summary: The study investigated the effects of annealing temperature on thermodynamic parameters and mechanical properties of a CuAlBeNbNiCr alloy. It was found that the magnitude of Gibbs free energy and elastic energies decreases with increasing temperature, while rupture deformation and stress induction increase when the annealing temperature is higher than 800 degrees C. The results highlight the effectiveness of the annealing mechanism in altering the thermodynamic and mechanical properties of CuAlBeNbNiCr alloys, providing insights for practical applications.
Article
Materials Science, Multidisciplinary
Wei Ma, Haozhong Xiao, Shuyi Wang, Sixing Liu
Summary: In this study, the diamond was vacuum-brazed to AISI 1045 steel using Ni-Cr + W composite alloy, which resulted in an increase in the exposed height of the diamond due to the reduction in its covering. Mechanical performance tests showed that diamond brazed using Ni-Cr + W composite alloy had 18% higher static pressure strength and 7% higher impact toughness compared to diamond brazed using common Ni-Cr alloy. The use of the composite alloy also decreased the degree of graphitization of the diamond and reduced its thermal residual stress by 11%.
Article
Nanoscience & Nanotechnology
Shunlong Tang, Meng Zhou, Yi Zhang, Deye Xu, Zhiyang Zhang, Xianhua Zheng, De Li, Xu Li, Baohong Tian, Yanlin Jia, Yong Liu, Alex A. Volinsky, Ekaterina S. Marchenko
Summary: New Cu-Ni-Sn-Ti-Cr and Cu-Ni-Sn-Ti-Cr-Ce alloys were prepared and studied. The Cu-Ni-Sn-Ti-Cr alloy showed a micro-hardness of 221 HV, a tensile strength of 598.1 MPa, elongation of 9.9%, and electrical conductivity of 45.2% IACS after solution treatment, 60% cold rolling, and aging. Similarly, the Cu-Ni-Sn-Ti-Cr-Ce alloy achieved a micro-hardness of 245 HV, a tensile strength of 645.2 MPa, elongation of 9.4%, and electrical conductivity of 44.6% IACS after the same treatment process. The comprehensive properties of these alloys are attributed to the composite effects of solution, deformation, grain boundary, and precipitation strengthening, with precipitation strengthening playing a major role.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Coatings & Films
Duohua Xu, Guoping Ling, Hongtao Wang
Summary: This research proposes an alternative process of electroplating nanocrystalline Cr-Al alloy coating with high hardness using anhydrous Cr2+ electrolyte. The influence of current density on mechanical properties and coating defects has been systematically investigated. The defect-free coatings achieved in this study have great potential for practical applications in various fields.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Shunsei Takeda, Kosuke Ueki, Kyosuke Ueda, Masaaki Nakai, Takayoshi Nakano, Takayuki Narushima
Summary: This study investigates the microstructure and mechanical properties changes of the Co-20Cr-15W-10Ni alloy tube, which is used as a balloon-expandable stent after heat treatment. It is the first report on improving mechanical properties through microstructure control in CCWN alloy tubes. Optimized heat treatment conditions are proposed for the development of small-diameter stents. The strength and plastic elongation of the alloy tube increased with decreasing grain size.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Physics, Applied
Y. Takeda, G. Nishijima, K. Inoue, Y. Takano, H. Kitaguchi
Summary: This study quantitatively investigated the effect of intermediate layer densification on the critical current (Ic) of Bi-2223 superconducting joints. The results showed that pressing the film samples to increase density can enhance the intergrain critical current density (Jc). Additionally, synthesizing an intermediate layer between two Bi-2223 tapes with uniform uniaxial pressure resulted in reproducible superconducting joints with high Ic.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Xukai Yao, Kang Peng, Xizhang Chen, Fengchun Jiang, Kai Wang, Qichen Wang
Summary: In this study, a combined cable wire and an aluminum welding wire were used for arc additive manufacturing of non-equimolar high-entropy alloy, and the differences in microstructure and mechanical properties in different parts of the alloy were systematically studied. The results showed that the alloy contained FCC phase and BCC phase, and with the increase of distance from the substrate, part of the FCC transformed into BCC. The increase of BCC improved the microhardness, yield strength, and ultimate tensile strength of the alloy.
Article
Materials Science, Multidisciplinary
Haoyang Liu, Yuhang Wei, Ye Zhang, Zhuangzhuang Hou, Xiuchen Zhao
Summary: The effects of Bi and Cu addition on the mechanical properties, wettability, and interfacial intermetallic compound (IMC) layer of Sn9ZnxBixCu (x = 0, 1.0, 2.0, 3.0, and 4.0 wt%) solder alloys were investigated. The addition of Bi and Cu significantly improved the mechanical properties and creep resistance of the alloy. Proper addition of Bi and Cu improved the wettability and inhibited the growth of interfacial IMCs.
MATERIALS TODAY COMMUNICATIONS
(2023)