Article
Chemistry, Physical
Gaoyuan Ouyang, Prashant Singh, Ranran Su, Duane D. Johnson, Matthew J. Kramer, John H. Perepezko, Oleg N. Senkov, Daniel Miracle, Jun Cui
Summary: By using density-functional theory methods and rapid bulk alloy synthesis and characterization, the researchers discovered Mo72.3W12.8Ta10.0Ti2.5Zr2.5 alloy, which has a well-balanced combination of room-temperature and high-temperature mechanical properties. This alloy exhibits comparable high-temperature compressive strength to MoNbTaW but with improved ductility and creep resistance. It also outperforms a commercial Mo-based refractory alloy and a nickel-based superalloy (Haynes-282) in terms of high-temperature tensile strength and creep resistance.
NPJ COMPUTATIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Shiyu Wu, Dongxu Qiao, Hongliang Zhao, Jun Wang, Yiping Lu
Summary: This study investigated the effect of Mo2C addition on the phase composition, microstructure evolution, and mechanical properties of NbTaW0.5(Mo2C) RHEAs. The results showed that the addition of Mo2C significantly improved the mechanical properties of the alloys, with NbTaW0.5(Mo2C)(0.2) RHEA reaching a yield strength exceeding 1000 MPa at 1473 K. The RHEAs exhibited good plasticity and promising application prospects.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Xiaolin Li, Haozhe Li, Qian Li, Chi Jin, Ke Hua, Haifeng Wang
Summary: This study developed a series of refractory high-entropy alloys (RHEAs) with different Al content to improve the oxidation and wear resistance at elevated temperatures. The addition of Al significantly improves the strength and oxidation resistance of the alloys. The friction coefficient and wear rate decrease with increasing Al content, attributed to the combined effect of mechanical properties and oxidation resistance.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Physical
Wentao Jiang, Xiaohong Wang, Huijun Kang, Bo Jiang, Duo Dong, Ye Wang, Dongdong Zhu
Summary: The effects of Zr on the microstructure and mechanical properties of Al0.5NbTiV2Zrx and Al0.5Nb0.5TiV2Zrx alloys were investigated. It was found that with the increase of Zr content, the matrix phase decreased and the volume fraction of the Laves phase increased, resulting in changes in the mechanical properties of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
N. Yurchenko, E. Panina, S. Zherebtsov, N. Stepanov
Summary: In this study, we investigated the oxidation behavior of refractory high-entropy alloys with different compositions. It was found that increasing the Al/Ti ratio reduced the mass gain but resulted in oxide scale spallation. The studied alloys demonstrated better oxidation resistance than the current high-entropy alloys at 800 degrees C. Analysis of the alloy with near-parabolic oxidation kinetics revealed the formation of an external oxide layer primarily composed of TiO2 and an internal reaction zone with O-rich products and TiN.
Article
Chemistry, Physical
Zhaomin Xu, Zhiping Sun, Cheng Li, Zhiming Wang
Summary: WVTaTiCrx (x = 0, 0.25, 0.5, 0.75, 1) refractory high-entropy alloy coatings were prepared using laser cladding on a 42-CrMo steel plate. The effect of Cr content on the microstructure and properties of the coatings was investigated. The addition of Cr greatly improved the hardness, high-temperature oxidation resistance, and corrosion resistance of the coatings. The WVTaTiCr (Cr-1) coating exhibited exceptional mechanical properties, especially in terms of hardness, high-temperature oxidation resistance, and corrosion resistance.
Article
Chemistry, Physical
Shutian Tao, Wei Jiang, Wei Zhang, Haochen Qiu, ShuaiShuai Wu, Shengli Guo, Baohong Zhu
Summary: This study investigates the synthesis of a novel alloy by introducing carbon element to a refractory high entropy alloy. The results demonstrate that the addition of carbon changes the phase identification, microstructure evolution, and mechanical properties of the alloy. With increasing carbon content, the alloy exhibits higher strength and a change in fracture mechanism.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
M. Wang, Z. L. Ma, Z. Q. Xu, X. W. Cheng
Summary: The novel VxNbMoTa high-entropy alloys with vanadium concentrations of 0-25 at.% exhibit exceptional phase stability and high temperature strength, as well as excellent room-temperature ductility and resistance to high temperature deformation.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Jiaojiao Yi, Lin Yang, Lu Wang, Mingqin Xu
Summary: A lightweight, refractory high entropy alloy CrNbTa0.25TiZr was prepared by arc-melting under vacuum, with as-cast and annealed samples showing improvement in yield strength and lower density compared to a reference alloy. The evolution of the microstructure highlights the promising strength of CrNbTa0.25TiZr.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Shi Qiu, Shu-Ming Chen, Naihua Naihua, Jian Zhou, Qing-Miao Hu, Zhimei Sun
Summary: The study shows that local chemical ordering significantly influences the structural stability and mechanical properties of refractory high entropy alloys. Local ordering enhances the structural stability, elastic property and ideal strength of the alloys. Chemical ordering mediates the thermodynamic properties of the alloys under different temperature and pressure conditions, but has little effect at high pressure.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
N. Yurchenko, E. Panina, A. Belyakov, G. Salishchev, S. Zherebtsov, N. Stepanov
Summary: High-entropy intermetallics show great potential for high-temperature applications, but there is limited information on their plastic flow behavior and deformation mechanisms. A yield strength anomaly was observed in a refractory AlNbTiVZr0.25 high-entropy alloy during compression tests, possibly connected to the glide of dissociated a (111) superdislocations.
Article
Materials Science, Multidisciplinary
X. J. Gao, L. Wang, N. N. Guo, L. S. Luo, G. M. Zhu, C. C. Shi, Y. Q. Su, J. J. Guo
Summary: This paper investigates the effects of Cr addition on the microstructure, phase constitutes, and mechanical properties of the Hf0.5Mo0.5NbTiZr refractory high-entropy alloy. The addition of Cr refines the dendritic structure, increases the strength, and influences the plasticity of the alloy. Homogenization treatment promotes the formation of Laves phase and significantly enhances the strength of the alloy.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Tiantian Wang, Wentao Jiang, Xiaohong Wang, Bo Jiang, Chuan Rong, Ye Wang, Jieren Yang, Dongdong Zhu
Summary: Novel lightweight Al0.5NbTi3VxZr2 (x 1/4 0.5, 1.0, 1.5) refractory high entropy alloys with good phase stability and excellent compression deformability were synthesized. The addition of V element enhanced the alloy's strength through solid solution strengthening and grain refinement strengthening mechanisms. The Al0.5NbTi3VxZr2 alloys showed both outstanding compression and tensile properties, which contribute to the development of toughening high entropy alloys for engineering applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Yake Xiao, Xianghe Peng
Summary: Lightweight Ti3Zr1.5NbVx RHEAs with high strength and good ductility were designed and prepared using vacuum arc melting. The Ti3Zr1.5NbV2 RHEA exhibited optimal mechanical properties, including high yield strength, fracture elongation, and specific yield strength, surpassing most previously reported RHEAs. Additionally, the Ti3Zr1.5NbV2 RHEA showed excellent performance at elevated temperatures. The solid solution strengthening effect and the role of Zr and V elements contributed to the high strength of the Ti3Zr1.5NbV2 RHEA.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Review
Materials Science, Multidisciplinary
Zechun Wang, Shiyao Chen, Shenglan Yang, Qun Luo, Yancheng Jin, Wei Xie, Lijun Zhang, Qian Li
Summary: In recent years, high-entropy alloys (HEAs) have attracted a lot of attention in the materials community, and significant progress has been made in exploring the potential of lightweight refractory high-entropy alloys (RHEAs) with excellent high-temperature properties. This paper provides a comprehensive review of the recent progress and status of lightweight RHEAs, including classifications, fundamental data, computational approaches, preparation techniques, mechanical properties, and behaviors at different temperatures.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Manufacturing
Yueling Guo, Lina Jia, Junyang He, Siyuan Zhang, Zhiming Li, Hu Zhang
Summary: By using electron beam surface melting, diverse microstructures of Nb-Si-Ti alloys consisting of eutectic and dendritic structures can be achieved. Increasing Si content triggers a transition from coupled to divorced microstructures. Compared to arc melting, electron beam melting enables the formation of fully lamellar eutectics in the Nb-Si-Ti alloys.
JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME
(2022)
Article
Materials Science, Multidisciplinary
Shiyu Wu, Dongxu Qiao, Haitao Zhang, Junwei Miao, Hongliang Zhao, Jun Wang, Yiping Lu, Tongmin Wang, Tingju Li
Summary: The microstructure and mechanical properties of refractory high-entropy alloys (RHEAs) were studied, showing excellent performance at high temperatures with yield strength surpassing currently known alloys. These RHEAs exhibited high-temperature performance stability and excellent plasticity.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Heng Duan, Bin Liu, Ao Fu, Junyang He, Tao Yang, C. T. Liu, Yong Liu
Summary: This study successfully prepared a FeCrNi medium entropy alloy with ultrahigh Cr content using SLM technology, showing excellent mechanical properties and corrosion resistance mainly attributed to the stable passive film formed by a large number of cell boundaries.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Yueling Guo, Junyang He, Zhiming Li, Lina Jia, Xiaoxiang Wu, Changmeng Liu
Summary: Introducing intermetallic silicides into refractory high entropy alloys can significantly improve their mechanical properties, especially at high temperatures. Si alloying enables grain refinement and the formation of intergranular silicides, resulting in improved compressive strength and deformation compatibility of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Hongwei Yao, Dongxu Qiao, Junwei Miao, Jun Wang, Enyu Guo, Yiping Lu
Summary: A criterion has been proposed to predict the phase stability of refractory high-entropy alloys (RHEAs), showing that a small atomic size difference is not a necessary condition for determining the stability of solid solution. The formation of Laves-phase precipitates can be inhibited by decreasing the atomic-size difference, the enthalpy of mixing, and the valence electron concentration. These criteria can be easily adapted to design new RHEAs with the desired phase structure.
PHILOSOPHICAL MAGAZINE LETTERS
(2022)
Article
Materials Science, Multidisciplinary
X. H. Chen, X. Q. Zhuang, J. W. Mo, J. Y. He, T. Yang, X. Y. Zhou, W. H. Liu
Summary: The study demonstrates that boron doping can effectively reduce the ductility loss and enhance the resistance to hydrogen embrittlement in CrCoNi medium-entropy alloy, by improving grain-boundary cohesion and reducing hydrogen diffusivity.
MATERIALS RESEARCH LETTERS
(2022)
Article
Chemistry, Physical
Meichen Hu, Li Wang, Gen Li, Qianli Huang, Yang Liu, Junyang He, Hong Wu, Min Song
Summary: This study investigates the potential of three medium entropy alloys (MEAs) as biomedical materials. The alloys exhibit a dendrite microstructure, which can be reduced through homogenization treatment. The MEAs show good compressive ductility and yield strength, as well as excellent corrosion resistance and cyto-compatibility. The Ti-Nb-Zr MEAs have promising potential in biomedical applications.
Article
Chemistry, Physical
Wentian Chen, Na Li, Feng Wang, Ji Gu, Junyang He, Min Song
Summary: In this study, we systematically characterized the microstructural evolution of the Cantor alloy, FeCoNiCrMn, during recrystallization at a typical mid-temperature, 700, and linked it carefully with the mechanical responses. We observed a two-stage strength-ductility variation, which has not been reported before for high-entropy alloys. This dual-stage transition may be associated with the initial inhomogeneity caused by cold-rolling and the different pathways for the evolution of such inhomogeneous microstructure during heating.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Guangyu Ren, Lili Huang, Kunling Hu, Tianxin Li, Yiping Lu, Dongxu Qiao, Haitao Zhang, Dake Xu, Tongmin Wang, Tingju Li, Peter K. Liaw
Summary: A novel antibacterial high-entropy alloy with superior antibacterial properties and corrosion resistance was designed and prepared. The alloy exhibited higher antibacterial rates and yield strength compared to classic antibacterial stainless steels.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Jing Peng, Jia Li, Bin Liu, Jian Wang, Haotian Chen, Hui Feng, Xin Zeng, Heng Duan, Yuankui Cao, Junyang He, Peter K. Liaw, Qihong Fang
Summary: Additive manufacturing is believed to open a new era in precise microfabrication. This study investigates the microstructure evolution of a prototype multi-principal-element alloy FeCrNi fabricated using selective laser melting (SLM) through experiment and simulation. The results reveal the growth of columnar crystals across cladding layers and the development of dense cellular structures in the filled crystal. At the micron scale, the constituent elements are evenly distributed, while at the near-atomic scale, segregation of Cr element is observed. Simulation results demonstrate changes in the solid-liquid interface and the formation of precipitates, microscale voids, and stacking faults due to the thermal gradient, resulting in residual stress in the SLMed structure. A microstructure-based physical model reveals the presence of strong interface strengthening in tensile deformation.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Yueling Guo, Junyang He, Zhiming Li, Xiaoxiang Wu, Wenjun Lu, Changmeng Liu
Summary: In this study, the rare-earth element alloying strategy was used to tune the microstructure and mechanical properties of a refractory high entropy alloy. The alloying of trace Y intensified solidification segregation and drove the microstructural evolution. The experiments showed a slight beneficial effect of the alloying on the compressive strength and fracture strain.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Junyang He, Rui Wang, Na Li, Zhongrun Xiao, Ji Gu, Hongyao Yu, Zhongnan Bi, Weihong Liu, Min Song
Summary: Through multi-scale characterizations from electron channeling contrast imaging to atom probe tomography, we have directly demonstrated that the massive cracking events in selective-laser-melted Haynes 230 superalloy are caused by the continuous decoration of an M(23)C(6-)type thin film at grain boundaries. Despite being strongly depleted from the carbide, impurities Si, Mn, and Fe greatly enhance the susceptibility to cracking.
MATERIALS RESEARCH LETTERS
(2023)
Article
Chemistry, Physical
Wentian Chen, Yufan Wu, Lin Guo, Ji Gu, Junyang He, Min Song
Summary: This study investigated the comprehensive effects of carbon doping on the recrystallization process and mechanical performance of the Cantor alloy during mid-temperature annealing. The presence of M23C6 carbides in the early stage of recrystallization accelerates the process by providing nucleation sites. The coarsening and migration of these carbides in the later stage suppresses the overall recrystallization process.
Article
Chemistry, Physical
Longjun Li, Li Wang, Zhida Liang, Junyang He, Min Song
Summary: The formation of various types of oxide scales on the surface and along the grain boundaries of a complex CoNi-based superalloy was investigated at 900 degrees C. A complex multilayered oxide scale was formed under steady-state conditions (oxidation time up to 24 hours). After the breakdown of the steady-state oxide scale (oxidation for 48 hours), different types of oxide scales occurred. It was also observed that oxidation gradually extended into the specimen interior along the grain boundaries, caused by selective oxidation of elements due to differences in equilibrium oxygen partial pressures. Local microstructure and oxygen concentration were found to significantly influence the formation and configuration of the oxide scales in the investigated alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Weijin Cai, Junyang He, Li Wang, Wenchao Yang, Xiangqi Xu, Khurram Yaqoob, Zhangwei Wang, Min Song
Summary: This study investigates the chemical short-range order (CSRO) in VCoNi medium-entropy alloy (MEA) processed by spark plasma sintering (SPS) and hot-rolling (HR). The SPS-HRed MEA exhibits a sharp increase in strength compared to the cast counterpart, attributed to the presence of dislocations, stacking faults, nano-twins, and V-oxide particles. Despite differences in microstructure and thermal routes, the CSRO in the SPS-HRed MEA shows a similar L11-type structure motif and sub-nanometer size. The preference of V-Co and avoidance of V-V pairs are observed, while the preference of V-Ni pair disappears due to the varying matrix composition.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Shuai Zhang, Shuye Zhang, Hongzhi Zhou, Kyung-Wook Paik, Tianran Ding, Weimin Long, Sujuan Zhong, Peng He
Summary: Microwave Hybrid Heating (MHH) is a promising method for material joining, allowing for selective and uniform heating. This experimental study focused on investigating the characteristics and reliability of joints made using nano-Sn-3.0Ag-0.5Cu soldering paste and MHH technique. The research findings showed that the shear strength of the joints reached its peak value under specific microwave power and exposure time, but decreased after thermal shock tests.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Peibin Ma, Mingyang Wang, Aiying Chen, Lijian Gu, Zhiyi Ding, Xiaogui Wang, Bin Gan
Summary: Nano-twinned boundaries in high-temperature alloys play a crucial role in regulating the distribution of nano-precipitates and enhancing mechanical properties.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Jiachen Zhang, Fan Lu, Xinxin Liu, Taiwen Huang, Rui Li, Changsheng Tan, Guojun Zhang, Lin Liu
Summary: This study investigates the effects of Re and Ta interactions on the precipitation of the TCP phase in experimental alloys under long-term thermal exposure. The study finds that microstructure segregation is not fully eliminated even with standard heat treatment, and the interaction between Re and Ta enhances the formation of the TCP phase. Thermodynamic calculations and first-principles analysis reveal that Re significantly improves the driving force of TCP phase precipitation. The study also observes a phase transition from the sigma-phase to the P-phase, with Ni playing a crucial role in the diffusion process.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Ronit Roy, Adil Shaik, Matthew Topping, Fei Long, Mark R. Daymond
Summary: This study demonstrates the improvements in characterizing localized dislocation distribution using the HR-EBSD method compared to the conventional approach. Two extreme examples of deformation conditions were investigated to show the efficacy of HR-EBSD in identifying dislocations and subtle features. The direct correlation between slip bands and HR-EBSD estimated GNDs is also presented, enhancing the scope of this approach in identifying individual slip bands.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Wenshan Guo, Hui Zhang, Qingjun Zhou, Guangchun Xiao, Ning Guo, Wei Zhao, Gang Wang
Summary: The microstructures and corrosion resistance of TC11 components were significantly improved using a high-power, high-speed laser metal deposition (LMD) process and subsequent post-heat treatment, with greater improvements observed in the deposition direction. The significant improvement of corrosion resistance in the deposition direction is mainly due to the weakening of the charged galvanic corrosion effect between the non-interlayer zone and interlayer zone.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Shuai Xu, Rui Cao, Junheng Gao, Yu Zhang, Haitao Zhao, Shuize Wang, Yuhe Huang, Guilin Wu, Honghui Wu, Chaolei Zhang, Xinping Mao
Summary: In this study, the microstructures and mechanical properties of interphase precipitation strengthening micro-alloyed steels were investigated. The addition of Cr was found to increase the yield strength without significant decrease of ductility. Thermodynamics analysis revealed that the addition of Cr led to grain refinement and decrease of sheet spacing of nanoprecipitates. Calculations showed that the decrease of interphase-precipitated carbides sheet spacing and the refinement of grain size were responsible for the strength enhancement of Cr microalloyed steel.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zhaoxin Zhong, Biao Zhang, Yuhan Ren, Jian Ye, Jiawei Zhang, Feng Ye
Summary: In this study, bioinspired web-liked multiphase composites were successfully constructed using boron-modified polysilazane polymer. The composites consisted of long TiB nanowires as 'web' and hybrid TiC and Ti3Si particles as 'nodes'. The enhanced strength of these composites was attributed to the synergistic load transfer of the hybrid reinforcements. This study provides a promising design approach for developing high-performance composites with high reinforcement content, utilizing polymer instead of traditional ceramic powder.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Geng Liu, Linran Yu, Jie Su, Ran Ding, Min Xiong, Qi Gao
Summary: In this study, a flash austenitization heat treatment approach was used to achieve a dual-phase microstructure consisting of retained austenite and fine-grained ferrite in low-carbon TRIP steel. Phase-field simulations revealed the acceleration of ferrite transition kinetics in the Mn-depleted region and the influence of chemical heterogeneity of C and Mn on the stabilization of austenite.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zhichao Yang, Dehui Zheng, Zhen Wang, Tingbin Liang, Shuangbao Wang
Summary: In this study, the configurations, formation process, and properties of the Cu-rich layer formed during TJE of Al alloys were revealed using aberration-corrected scanning TEM (STEM), STEM image simulations, and first-principles calculations. The results showed a new orientation relationship between the Cu-rich layer and Al matrix, and provided insights into the formation mechanisms of the Cu-rich layer and Cu diffusion zone.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Shuai Chen, Ruyu Tian, Jiayue Wen, Yanhong Tian
Summary: In this study, the interfacial microstructure evolution and reliability of Cu/Sn-3.0Ag-0.5Cu (SAC305)/Ni and Cu/Sn-3.0Ag-0.5Cu-0.05TiO2 (SAC305-0.05TiO2)/Ni interconnections under thermal shock were investigated. The results showed that the addition of TiO2 nanoparticles can suppress the growth of interfacial IMCs and improve the reliability of the connections.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Yunbin Lu, Yangju Feng, Wei Wang, Wenke Wang, Jianlei Yang, Wenzhen Chen, Guorong Cui, Dongdong Zhuang, Hongyang Cao
Summary: In order to improve the wear resistance of titanium alloy, titanium matrix composites with network distributed TiBw were fabricated. The results showed that the wear rate of the composites decreased by 17.2% at room temperature and 38.4% at high temperature compared to the TA15 alloy. The TiBw in the composites enhanced work hardening, improved thermal conductivity, and effectively hindered dislocation movement and promoted dynamic recrystallization during high-temperature wear.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Jubert Pasco, Lu Jiang, Thomas Dorin, Ali Keshavarzkermani, Youliang He, Clodualdo Aranas Jr
Summary: The unique structure and solute distribution of CoCrMo alloys produced using Laser Powder Bed Fusion technique require custom heat-treating processes to achieve the targeted phase distribution and mechanical properties. This study investigates the phase transformation behavior and precipitate distribution of CoCrMo samples after aging heat treatment. The results show differences in phase fraction and nucleation sites between directly aged and solution heat-treated samples.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zipeng Ma, Meng Zhou, Baohong Tian, Yi Zhang, Heng Li, Xu Li, Jin Zou, Haoyan Hu, Ke Jing, Yong Liu, Alex A. Volinsky
Summary: In this study, two electrical contact composites were prepared using the vacuum hot pressing sintering endo-oxidation method. The addition of Y2O3 had no negative effects on the electrical conductivity and hardness of the composites. Moreover, it reduced the welding force and arc energy, and improved the stability of the contacts.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Wei Sun, Ning Cui, Shuling Zhang, Tiewei Xu, Xiaopeng Wang, Fantao Kong
Summary: A laminated composite was successfully fabricated and its microstructure and mechanical properties were investigated. The composite exhibited high bonding strength, improved flexural strength and fracture toughness, and superior tensile properties compared to the monolithic alloy.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zih-You Wu, Yin-Ku Lee, Su-Yueh Tsai, Po-Yu Chen, Jenq-Gong Duh
Summary: With the development of the artificial intelligence (AI) industries, electronic packaging is advancing towards high density, high efficiency, and multi-functionality. The application of microbumps is necessary to achieve high density and small-scale interconnection. In this study, three types of full intermetallic compounds (IMCs) bumps were fabricated, and the mechanical and thermal properties of IMCs were analyzed. The results showed that the full IMCs bumps with added Ni and Zn exhibited consistent structure and excellent thermal stability, providing a reliable microstructure for application.
MATERIALS CHARACTERIZATION
(2024)