Article
Materials Science, Multidisciplinary
Guan-Qiang Wang, Ming-Song Chen, Hong-Bin Li, Y. C. Lin, Wei-Dong Zeng, Yan-Yong Ma
Summary: The study investigated the uniform refinement mechanisms in a Ni-based superalloy during two-stage annealing treatment. By selecting suitable times for aging annealing treatment and recrystallization annealing treatment, a mixed microstructure with abnormal coarse recrystallization grains and fine grains can be achieved.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Optics
Jiangdong Cao, Xueyu Cao, Bochen Jiang, Fang Yuan, Da Yao, Jian Huang
Summary: The study found that high power laser shock processing induced microstructural evolution in the Ni-based superalloy GH202, including dislocation slip and twinning. LSP also promoted dynamic recrystallization and the formation of dislocation arrays and subgrains within 250 microns in depth. Beyond 200 microns, the dislocation density significantly decreased.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Engineering, Multidisciplinary
Wang Guanqiang, Chen Mingsong, Lin Yongcheng, Li Hongbin, Zeng Weidong, Ma Yanyong, Cai Jinliang, Peng Chengxu, Zou Fenyang
Summary: The novel method of cooling recrystallization annealing treatment (CRT) effectively balances the need to increase SRX nucleation rate and decrease grain growth rate during annealing, resulting in a uniform and fine grain microstructure. By employing suitable cooling rates and recrystallization annealing temperatures, the deformed mixed grain microstructure can be refined to an average size of 8.26 μm.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2021)
Article
Nanoscience & Nanotechnology
Yeshun Huang, Rui Zhang, Zijian Zhou, Jingbo Yan, Yong Yuan, Yuefeng Gu, Chuanyong Cui, Yizhou Zhou, Xiaofeng Sun
Summary: The microstructural evolution, tensile behavior and deformation mechanism of a Fe-Ni-based superalloy for advanced ultra-supercritical coal-fired power plant during long-term isothermal exposure at 700-800 degrees C were investigated. The results showed that long-term thermal exposure led to the coarsening and decomposition of gamma ' phase, which may result in premature fracture failure of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Ke Tang, Zhibo Zhang, Jin Tian, Yake Wu, Feng Jiang
Summary: The study on hot deformation behaviors of supersaturated Inconel 783 superalloys revealed the optimal temperature and strain rate range to be 1100-1200 degrees C and near or below 0.1 s(-1) but higher than 0.01 s(-1). The microstructural observation showed that the recrystallized degree and grain size were affected by temperature and strain rate differently.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Multidisciplinary Sciences
Osamu Takakuwa, Yuhei Ogawa, Ryunosuke Miyata
Summary: The mechanical properties of structural alloys, such as the Ni-based superalloy 718, are degraded by the presence of hydrogen, leading to hydrogen embrittlement. In particular, the fatigue crack growth (FCG) property is significantly deteriorated by hydrogen, resulting in a higher growth rate and shorter lifetime for components operating in a hydrogenating environment. Therefore, understanding the mechanisms behind this acceleration phenomenon is crucial for developing alloys that are resistant to hydrogen occlusion. This study reveals that the FCG acceleration in Alloy718 can be negligible when hydrogen is dissolved, and instead, an abnormal deceleration of FCG can be achieved by optimizing the metallurgical state, offering a hopeful prospect for Ni-based alloys in hydrogenating environments.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Physical
Tae-Jin Lee, Woo-Jin Kim
Summary: Severe plastic deformation and short annealing treatment result in a partially recrystallized microstructure with small grain size in Ni-rich Ti-50.8Ni alloy. Aging treatment leads to the formation of R phase as the major phase, which contributes to excellent superelasticity and superelastic cyclability. The achievement is attributed to grain refinement, particle strengthening, and reduced critical stress for stress-induced martensite transformation due to the presence of R phase.
Article
Chemistry, Physical
Ming-Song Chen, Yan-Yong Ma, Y. C. Lin, Yu-Min Lou, Hong-Bin Li, Guan-Qiang Wang, Quan Chen
Summary: In this study, an innovative annealing treatment method was proposed to refine the deformed mixed grains of the initial aged GH4169 superalloy. By combining aging treatment with continuous-cooling recrystallization annealing treatment (CC-RAT), both the nucleation rate and grain growth rate can be effectively controlled. The research results demonstrate that the microstructure can be fine and uniform by adjusting the heat treatment parameters, leading to improved performance of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Miao Wang, Xingwei Huang, Peng Xue, Shangquan Wu, Chuanyong Cui, Qingchuan Zhang
Summary: In this study, friction stir processing (FSP) was used to process a high-strength and high-melting-point Ni-Co based superalloy, achieving enhanced strength and ductility. The FSP samples exhibited significantly higher yield strength and ultimate tensile strength at both room temperature and 400 degrees C, demonstrating a synergy between strength and ductility. The mechanisms contributing to the improved mechanical properties, such as grain-boundary and nanotwin strengthening, were investigated and discussed.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Xiao Liu, Zhenglu Liu, Litao Zhang, Qinglong Zhao, Qichuan Jiang
Summary: The addition of trace TiC nanoparticles in Ni-Fe based cast superalloy has been found to effectively refine the microstructure, improve the tensile properties, and enhance the mechanical performance at room and elevated temperatures. This study offers a new strategy for enhancing the mechanical properties of cast superalloys fabricated by conventional casting processes.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Mingsong Chen, Quan Chen, Yumin Lou, Yongcheng Lin, Hongbin Li, Guanqiang Wang, Hongwei Cai
Summary: This study explores the effect of deformation parameters on microstructure evolution during the new two-stage annealing method. The results show that the deformation parameters mainly affect the grain microstructure by influencing the content, distribution, and morphology of the delta phase after deformation. When the deformation temperature is high, the complete dissolution behavior of the delta phase nuclei promotes the dispersion distribution of the b phase, resulting in a fine and heterogeneous microstructure. However, a high retained content of delta phase nuclei leads to the formation of clusters of intragranular delta phases and slows down the elimination of the mixed grain microstructure.
Article
Chemistry, Physical
Yu-Chi Xia, Xiao-Min Chen, Yong-Cheng Lin, Xian-Zheng Lu
Summary: The hot deformation characteristics of GH4169 superalloy were investigated, and the effects of deformation parameters on flow curves and annealing twins were discussed. It was found that the deformation temperature greatly affected the shapes of flow curves, and the evolution of annealing twins was sensitive to deformation degree, temperature, and strain rate.
Article
Materials Science, Multidisciplinary
Dongdong Xu, Thomas E. J. Edwards, Zhirong Liao, Xavier Maeder, Rajaprakash Ramachandramoorthy, Manish Jain, Johann Michler, Dragos Axinte
Summary: Shear-based material removal processes significantly affect workpiece surface quality and functional performance. In-situ SEM nano-cutting reveals crystal flow and lattice rotation below the cutting edge in polycrystalline Nickel superalloy. Deformed nanolayer forms within single grains, while nano-recrystallization and grain boundary bending occur in nano-cutting multiple grains.
Article
Materials Science, Multidisciplinary
Hao Liu, Xinbao Zhao, Yong Yuan, Yingying Dang, Weiqi Li, Jiachen Xu, Yuan Cheng, Quanzhao Yue, Yuefeng Gu, Ze Zhang
Summary: The influence of long-term thermal exposure on the microstructure evolution and tensile behavior of a new wrought y'-hardened Ni-base superalloy has been investigated. The results show that discontinuous carbides precipitate at the grain boundaries and spherical y' precipitates disperse uniformly within the y matrix after heat treatment. During thermal exposure, the y' precipitates remain spherical morphology and their coarsening behavior follows the LSW model. The tensile strength of the experimental superalloy generally decreases with the increase of tensile temperature after heat treatment, while the elongation reaches its maximum at 650 degrees C. After thermal exposure, the tensile strength of the experimental superalloy improves while the elongation slightly decreases.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
X. Yao, Q. Ding, X. Zhao, X. Wei, J. Wang, Z. Zhang, H. Bei
Summary: The study shows that the gamma/gamma' two-phase cuboid microstructure of SX superalloys can be restored by solid solution plus aging treatment, but additional recovery annealing is required for compressed alloys to prevent recrystallization. Defect analysis in nanometer scales justifies the mechanism behind the additional recovery annealing.
MATERIALS TODAY NANO
(2022)
Article
Materials Science, Multidisciplinary
Guo-Dong Pang, Yong-Cheng Lin, Yu-Liang Qiu, Yu-Qiang Jiang, Yi-Wei Xiao, Ming-Song Chen
Summary: The flow behaviors of Ti-55511 alloy with basket-weave microstructures in the alpha + beta region are influenced by deformation temperature and strain rates. The primary softening mechanisms are the dynamic recovery of beta grains and the spheroidization of lamellar alpha phases. Models based on dislocation density and stacked auto-encoder (SAE) are used to analyze the flow behaviors, showing high prediction accuracy and demonstrating the nonlinear relationship between flow stress and deformation parameters.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Chemistry, Physical
Yu-Qiang Jiang, Y. C. Lin, Guan-Qiang Wang, Guo-Dong Pang, Ming-Song Chen, Zhi-Chao Huang
Summary: The microstructure evolution of a Ti-55511 alloy deformed at high temperatures and wide strain rate range was studied, and a unified constitutive equation was established to describe the evolution of flow stress, grain size, and dynamic recrystallization fraction. Experimental results showed different structures were formed within the alloy under different deformation conditions, with DRX fraction and sub-grain size changing with increasing deformation temperature and strain rate.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Yi-Guang Zhao, Zhi-Chao Huang, Yu-Qiang Jiang
Summary: This study investigates the low-velocity impact behaviors of DP590/AA6061 self-piercing riveting joints at different impact energies and evaluates the mechanical property evolution of the joints after impact. The results indicate that the absorbed impact energies of the joints reach the critical value at 30 J, exceeding which leads to crack failures in the sheets and decreased interlocking performance. The low-velocity impacts significantly reduce the mechanical interlocking properties of the joints and make them more sensitive to cyclic loadings.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Chemistry, Physical
Ze-Jie Zhou, Zhi-Chao Huang, Yu-Qiang Jiang, Nan-Lin Tang
Summary: This study investigates the effects of rivet height and laying order of metal sheets on the joining quality in self-piercing riveting experiments of aluminum alloy and high-strength steel sheets. The results show that AA5052 alloy and SPFC440 steel can be effectively joined by self-piercing riveting, with good contact between rivet head and sheet surfaces. The joints exhibit better static tensile properties and fatigue strength under specific conditions.
Article
Materials Science, Multidisciplinary
Zhi-Chao Huang, Ze-Jie Zhou, Yu-Qiang Jiang
Summary: This study combines shot peening process with self-piercing riveting process to improve the performance of self-piercing riveting joints. Shot peening can induce residual compressive stress in aluminum sheets, resulting in improved static and fatigue strength of the joints. The main fatigue failure type is the damage of the lower sheets at the contact zones with the rivet leg. The shot peening process effectively enhances the self-piercing riveting joint performance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Zhi-Chao Huang, Yu-Kuan Zhang, Yong-Cheng Lin, Yu-Qiang Jiang
Summary: This paper investigates the self-piercing riveting forming qualities and joint strengths of foam iron-nickel/copper sandwich composite aluminum plates with AA5052 aluminum alloys. The study finds that foam metal sandwich composite aluminum plates can increase interlock width and improve self-locking performance of joints. Furthermore, the bottom thicknesses are significantly increased when the foam metal sandwich composite aluminum plates are riveted as bottom plates.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Guanqiang Wang, Mingsong Chen, Yongcheng Lin, Hongbin Li, Yuqiang Jiang, Yanyong Ma, Chengxu Peng, Jinliang Cai, Quan Chen
Summary: This research aims to clarify the connections between recrystallization and the delta (8) phase (Ni3Nb) during annealing in Ni-based alloys. The results show that the microstructure and component of the 8 phase dominate the recrystallization nucleation in the alloy.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Zhi-Chao Huang, Ying-Lian Jia, Yu-Qiang Jiang, Yong -Chao Zhang
Summary: Automotive light-weighting is an important trend in the automotive industry, and the joining of light-weighting materials is crucial. This study investigated self-piercing riveting (SPR) and SPR-bonded (SPR-A) joints of AA6061 and DP590 sheets, and evaluated their mechanical properties after exposure to salt spray environments for different aging times. The results showed that the shear and fatigue properties of the joints decreased with longer salt spray exposure. The SPR-A joints exhibited higher failure loads and energy absorption values compared to the SPR joints under the same salt spray time. Fatigue failure was mainly attributed to fretting wear between the rivet-foot and the lower sheet, and the salt spray time had no significant effect on the fatigue failure modes of both joint types.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Jiamei Lai, Zhichao Huang, Nanlin Tang, Zhaoxiao Hu, Yuqiang Jiang
Summary: This study investigated the influence of salt spray corrosion on self-piercing riveted joints. The results showed that the static and fatigue strengths of the joints decrease with prolonged salt spray time, and the failure modes also change. The initiation and propagation of fatigue cracks are promoted by salt spray corrosion.
Article
Materials Science, Multidisciplinary
Zhi-Chao Huang, Guo-Huang Huang, Feng-Wu Shan, Yu-Qiang Jiang, Yun-Qi Zou, Xiao-Yong Nie
Summary: Flow drill screwing (FDS) is an optimal process for single-side connection of metal sheets. However, the plastic deformation and high temperature during the connection process can greatly affect the mechanical properties and microstructure of the metal sheets. In this study, AA6061-T6 sheet was connected using the FDS process, and the forming quality and microstructure evolution of the alloy were investigated. The results showed that the plate and the screw were mechanically connected, with obvious plastic deformation and recrystallization occurring in the aluminum alloy around the screw. This resulted in the formation of a fine-grained zone near the joint interface. The high temperature in the connection process partially promoted the dissolution of the strengthening phase, leading to a decreased strength of the alloy matrix near the screw.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Yong-Chao Zhang, Zhi-Chao Huang, Yu-Qiang Jiang, Ying-Lian Jia
Summary: Self-piercing riveting (SPR) is a technology that is widely used in the automotive industry for joining various materials. This study analyzed the effects of forming parameters on the qualities and properties of SPR joints made of B1500HS steel and AA5052 aluminum alloy. The results showed that the stack sequence of the sheets had minimal influence on the peak tensile load and rigidity of the joints. Joints with the steel sheet placed on the aluminum sheet exhibited better mechanical stability and increased fatigue life compared to joints with the opposite sequence.
Article
Materials Science, Multidisciplinary
Jia-Fu Wu, Yu-Qiang Jiang, Wei Deng, Gu-Wen Yao
Summary: Hastelloy C276 is widely used in new generation nuclear power plants for optimum formation through hot deformation. The research on hot deformation and constitutive modeling of Hastelloy C276 alloy establishes processing maps. The results show that strain rate and temperature significantly affect the deformation behaviors of Hastelloy C276 alloy.The yield behavior and flow stress are predicted using the Arrhenius constitutive equation, with correlation coefficients of 0.9613 and 0.9837 indicating high predictive capability. Increasing the deformation temperature reduces unstable deformation area, allowing the alloy to deform at low strain rates. However, high strain rates cause flow localization unsuitable for hot deformation.
MATERIALS RESEARCH EXPRESS
(2023)
Article
Materials Science, Multidisciplinary
Zhi-Chao Huang, Dao-Chun Lu, Yong-Chao Zhang, Yu-Qiang Jiang, Yan Lu, Yan-Wei Guo
Summary: In this study, TC4 titanium alloy was solution heat treated and its joint performance was evaluated through riveting and tensile tests. The results showed that solution heat treatment significantly improved the elongation, mechanical properties, and hardness of TC4 titanium alloy. The highest tensile strength was achieved at a solution temperature of 930°C. The failure morphology of TC4 titanium alloy varied under different solution heat treatment temperatures.
MATERIALS RESEARCH EXPRESS
(2023)
Article
Materials Science, Multidisciplinary
Zhi-Chao Huang, Nan -Lin Tang, Yu-Qiang Jiang, Qi Zhang
Summary: Foam metal composite plates, specifically nickel foam, are widely used in lightweight car design. This paper investigates the connection between nickel foam composite plates and AA5052 aluminum alloy using self-piercing riveting. The impacts of different energies and times on the joints were studied, with a focus on mechanical properties and failure forms.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Mechanics
Zhi-Chao Huang, Hai-Zhou Li, Yu-Qiang Jiang
Summary: In this study, the dynamic loading response and impact damage mechanism of carbon fiber reinforced polymer (CFRP) laminates and AA6061-T651 self-piercing riveting joints were investigated through drop weight tests. It was found that the low-velocity impact position had a significant influence on the strength of the joints. Two impact damage mechanisms were identified, with CFRP laminates undergoing internal damage below 10 J impact energy and aluminum alloy experiencing plastic deformation above 10 J. The composite damage played a leading role in absorbing the impact energy.
COMPOSITE STRUCTURES
(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)
