Article
Materials Science, Multidisciplinary
Junmiao Shi, Jiatao Liu, Feng Jin, Fuqiang Tian, Xianjun Sun
Summary: In this study, the diffusion bonding of FGH98 superalloy and DD5 single crystal using a pure Ni interlayer was successfully achieved, resulting in a reinforced joint at high temperatures. With increasing temperature, diffusion was promoted significantly, favoring the formation of the reinforcing phase in the joint. However, the fracture location of the joint obtained at the highest temperature was in the interlayer zone.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Jairo Alberto Munoz, Mariela Melia, Martina Avalos, Raill E. Bolmaro
Summary: Commercially pure grade 2 titanium sheets were processed using equal channel angular sheet extrusion (ECASE) up to two passes at room temperature, resulting in a heterogeneous microstructure with high twin densities near the sheet edges. This heterogeneity increased material strength by 200 MPa while maintaining a 10% uniform deformation zone. The strength improvement was mainly attributed to grain size reduction induced by twins near the edge areas during deformation.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Physical
Tong Chen, Shinji Koyama, Shinichi Nishida, Lihua Yu
Summary: Pure titanium was treated by atmospheric oxidation to improve surface hardness and wear resistance, with 850 degrees Celsius identified as the optimal processing temperature. The hardened layer at this temperature exhibited excellent peeling resistance, with minimal wear depth and width.
Article
Materials Science, Multidisciplinary
H. Wang, Z. M. Xie, L. C. Zhang, L. Han, R. Liu, Q. F. Fang, X. P. Wang, C. S. Liu, Xuebang Wu
Summary: The damage behaviors of ITER grade tungsten under repetitive thermal loads have been investigated. The results show that there are negligible effects on the microstructures, surface morphologies and mechanical properties with low absorbed power densities. However, serious damages occur when the heat loads reach a certain level, leading to severe surface roughness and grains coarsening, which significantly degrade the material's mechanical properties.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
C. Rudolf, R. Goswami, W. Kang, J. Thomas
Summary: Uniaxial tension tests were conducted on pure polycrystalline copper, iron, and titanium specimens with varying current levels, showing non-thermal current effects in titanium but not in copper and iron. Potential mechanisms for the observed electrically-assisted deformation (EAD) effects in titanium were suggested, offering new avenues for research in understanding EAD of metals.
Article
Materials Science, Multidisciplinary
Yinkai Shi, Hua Yu, Shizhong Wei, Weimin Long, Yunpeng Li, Liangliang Zhang, Xinna Cao, Lingling Huang, Luyang Song, Zhuoli Yu, Sujuan Zhong, Yongtao Jiu, Yunfeng Chang
Summary: The purpose of this article was to provide a theoretical basis for the manufacture and practical working application of metal composite plates by simulating the influence of post-weld heat treatment on the interfacial characteristics, microstructure, composition, and mechanical properties of copper/steel composite plates. The study investigated the microstructure and melting properties of BAg30T filler metal and evaluated the effect of heat treatment on the microstructure and mechanical properties of Cu-Fe dissimilar metal joints. The results showed significant changes in the microstructure and mechanical properties of the joints, and the PWHT process at 600 degrees C improved the tensile strength of the brazed joint.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Xuan Chen, Han Xiao, Ya-ming Shi, Cheng Qian, Qing-biao Zhang, Peng Shao, Zhi-qiang Yang, Zhi-rong Huang, Kun Liu
Summary: Vacuum diffusion bonding was used to join commercial pure titanium and medium carbon steel at 850 degrees C, 5 MPa, and bonding times of 1, 2, 3, and 4 hours. The microstructure and mechanical properties of the joints were investigated. The results showed a successful bonding between the two materials, with better bonding observed at longer bonding times. The microstructure of the diffusion layer consisted of TiC, TiFe, and Fe2Ti. The tensile strength and hardness varied with bonding time, reaching maximum values at 3 and 4 hours.
Article
Chemistry, Physical
Boxian Zhang, Chunhuan Chen, Zelun Cai, Hao Tian, Jinbao Hou, Lu Chai, Yanlong Lv, Jianchao He
Summary: The study successfully optimized the overall structure design of aero-engine turbine disks through pulsed current diffusion bonding on DD5 and FGH98 alloys. After post-welding heat treatment, the joints exhibited improved microhardness and room/high temperature tensile strength.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Chan Hyeok Lee, Seong-Woo Choi, P. L. Narayana, Thi Anh Nguyet Nguyen, Sung-Tae Hong, Jae H. Kim, Namhyun Kang, Jae-Keun Hong
Summary: Rapid electric current heat treatment successfully applied to CP Ti cold-rolled sheet led to smaller and more uniform grain size, weaker texture, and improved tensile properties compared to conventional heat treatment. The electric current treatment resulted in less sheet distortion and better oxidation resistance.
Article
Chemistry, Physical
Fang Cheng, Huaming Wang, Yu Wu, Xingjia Ma, Jiawei Wang, Junwei Yang, Xu Cheng
Summary: This paper investigates the evolution of microstructure, microhardness, and tensile properties of TiAl alloy prepared using a continuous direct energy deposition technique (CDED). The results show that the alloy consists of columnar grains with very fine (α2+γ) lamellae, and a special duplex γ microstructure forms.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Weifeng Liu, Jianyang Zhang, Mingyue Sun, Bin Xu, Yanfei Cao, Dianzhong Li
Summary: Hot-compression bonding followed by soaking treatment was used to produce large high-speed homogeneous steels. The interfacial microstructure and tensile strength of joints were affected by various parameters, and post-holding treatment can promote the healing of the interface for better bonding.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
Bo Peng, Jinchuan Jie, Mingfei Wang, Bowen Dong, Xianlong Wang, Shunyu Li, Tingju Li
Summary: The tin bronze and steel bimetal layered composite plate was prepared using continuous solid-liquid bonding. Microstructures and interdiffusion between Cu and Fe were analyzed, and mechanical properties were examined through different tests. The study found that the bonding between the layers was excellent, and the ultimate tensile strength was higher than expected due to the synergistic strengthening of the interface. The plastic instability strain and yield strength were affected by factors such as twinning in the tin bronze and reduction in grain size caused by rolling. The bending tests showed that the strength of the interface was higher than that of the tin bronze.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Construction & Building Technology
Li Wang, Yu Yang, Liang Yao, Guowei Ma
Summary: In this study, 3D printing concrete was used as a permanent formwork to speed up the construction of prefabricated reinforced concrete structures. The influence of the roughness of the printing formwork and the age difference between the formwork and post-cast concrete on the bonding properties of the interface were investigated. The results showed that the bonding interface had the best tensile and shear properties when the layer height of the printing formwork was 20 mm.
CEMENT & CONCRETE COMPOSITES
(2022)
Article
Materials Science, Multidisciplinary
Dasheng Wei, Qinan Han, Lei Cai, Xuegang Min, Zonghan Xie, Feng Fang
Summary: A study on the production of pure iron wires through a two-step process of torsion and cold drawing showed an increase in Vickers hardness, changing grain structure, and enhanced tensile strength and elongation to failure, resulting in a desirable combination of high strength and ductility.
MATERIALS CHARACTERIZATION
(2021)
Article
Polymer Science
Jiayi Wang, Lifeng Chen, Wei Shen, Lvtao Zhu
Summary: As the tensile strength increases, the response speed of midpoint deformation increases, the thread deformation mode changes from overall deformation to partial deformation, and the localized effect increases, accompanied by severe matrix and fiber fracture failure; the thread energy dissipation ratio ascends with increasing pull-off strength and exhibits three distinct stages, i.e., elastic deformation, central fracture, and complete failure, which are directly related to the structural failure mode.
Article
Engineering, Electrical & Electronic
Yi-Wei Tseng, Fei-Yi Hung, Truan-Sheng Lui, Mei-Yu Chen, Hao-Wen Hsueh
MICROELECTRONICS RELIABILITY
(2015)
Article
Engineering, Electrical & Electronic
Fei-Yi Hung, Truan-Sheng Lui, Li-Hui Chen, Hao-Wen Hsueh
MICROELECTRONICS RELIABILITY
(2011)
Article
Engineering, Electrical & Electronic
I-Ting Huang, Fei-Yi Hung, Truan-Sheng Lui, Li-Hui Chen, Hao-Wen Hsueh
MICROELECTRONICS RELIABILITY
(2011)
Article
Engineering, Electrical & Electronic
Hao-Wen Hsueh, Fei-Yi Hung, Truan-Sheng Lui, Li-Hui Chen
MICROELECTRONICS RELIABILITY
(2011)
Article
Engineering, Electrical & Electronic
Hao-Wen Hsueh, Fei-Yi Hung, Truan-Sheng Lui, Li-Hui Chen, Jun-Kai Chang
MICROELECTRONICS RELIABILITY
(2014)
Article
Materials Science, Multidisciplinary
Hao-Wen Hsueh, Fei-Yi Hung, Truan-Sheng Lui, Li-Hui Chen, Kuan-Jen Chen
ADVANCES IN MATERIALS SCIENCE AND ENGINEERING
(2014)
Article
Materials Science, Multidisciplinary
Eisner Salamanca, Ting-Chia Tsao, Hao-Wen Hseuh, Yi-Fan Wu, Cheuk-Sing Choy, Chin-Kai Lin, Yu-Hwa Pan, Nai-Chia Teng, Mao-Chuan Huang, Shang-Ming Lin, Wei-Jen Chang
Summary: This study compared the properties and efficacy of different ratios of beta-TCP and PLA for 3D-printed filament material, finding that a ratio of 90% PLA to 10% beta-TCP was more effective for GBR treatment.
FRONTIERS IN MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Eisner Salamanca, Yu-Hwa Pan, Ying-Sui Sun, Hao-Wen Hsueh, Odontuya Dorj, Wan-Ling Yao, Jerry Chin-Yi Lin, Nai-Chia Teng, Ikki Watanabe, Shinichi Abe, Yi-Fan Wu, Wei-Jen Chang
Summary: This study aimed to improve the properties of β-TCP by adding magnesium through hydrothermal methods, resulting in enhanced alkaline phosphatase activity and cell viability, promoting bone regeneration.β-TCP/Mg demonstrated potential application prospects in bone grafting and tissue engineering treatments.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Physics, Applied
Hao-Wen Hsueh, Fei-Yi Hung, Truan-Sheng Lui
APPLIED PHYSICS LETTERS
(2017)
Proceedings Paper
Engineering, Electrical & Electronic
Hao-Wen Hsueh, Fei-Yi Hung, Truan-Sheng Lui, Li-Hui Chen
2015 EUROPEAN MICROELECTRONICS PACKAGING CONFERENCE (EMPC)
(2015)
Proceedings Paper
Engineering, Environmental
Hao-Wen Hsueh, Fei-Yi Hung, Truan-Sheng Lui, Li-Hui Chen
Article
Engineering, Electrical & Electronic
Zhiqiang Wang, Siyang Dai, Yao Zhao, Guofeng Li, Bing Ji, Volker Pickert, Bowen Gu, Shuai Ding
Summary: This paper proposes a lumped-charge model for IEGT single chip, considering the effect of carrier injection enhancement in the emitter. The parasitic inductance of the parallel branches in PP-IEGT is extracted using Ansys simulation, and the validity of Ansys simulation is verified. Furthermore, the switching inconsistency is evaluated by combining the electrical model and the effect of mutual inductance, and it is found that mutual inductance is an important factor influencing electrical parameter distribution.
MICROELECTRONICS RELIABILITY
(2024)
Article
Engineering, Electrical & Electronic
Sankha Subhra Ghosh, Surajit Chattopadhyay, Arabinda Das, Nageswara Rao Medikondu, Abdulkarem H. M. Almawgani, Adam R. H. Alhawari, Sudipta Das
Summary: This article describes a method for identifying the IGBT switch breakdown failure in a 3-phase, 3-level Voltage Source Converter linked to the photovoltaic grid. Comparative learning has been used to detect the specific parameter suitable for the detection of the failure.
MICROELECTRONICS RELIABILITY
(2024)
Article
Engineering, Electrical & Electronic
Milad Khajehvand, Henri Seppanen, Panthea Sepehrband
Summary: Using SEM/EDX analysis, microscale fracture at the bond-pad is detected during the wedge bonding process of Cu wire to a Cu or Al substrate. It is observed that the fracture of the bond leads to the formation of a bulge on the wire and a cavity in the substrate, causing fracture in the original substrate. 3D optical profiler reveals that the depth, radius, and surface area of the cavity increase with bond time for a constant bond force and power. These metrics are suggested as new factors for optimizing the wedge bonding process. The optimal bonding parameters should maximize the cavity's surface area (related to bond's pull force) while minimizing the cavity's depth relative to the substrate's thickness to avoid substrate damage. Furthermore, Molecular Dynamics simulations propose a potential plastic deformation mechanism for bond-pad damage, suggesting the benefits of using a small-grain-sized substrate, low transducer's vibration amplitude, and high transducer's frequency to minimize the cavity's depth.
MICROELECTRONICS RELIABILITY
(2024)
