Article
Materials Science, Multidisciplinary
Maxim G. Khomutov, Sayed M. Amer, Ruslan Yu. Barkov, Maria V. Glavatskikh, Alexander Yu. Churyumov, Andrey V. Pozdniakov
Summary: The hot deformation behavior of novel Al-Cu-Y(Er)-Mg-Mn-Zr alloys was investigated through compression tests at different temperatures and strain rates. The influence of intermetallic particles on flow stress was observed, leading to the establishment of hyperbolic sine law constitutive models for the alloys. Optimum hot deformation temperatures and conditions were determined for this alloy.
Review
Materials Science, Multidisciplinary
Deye Xu, Meng Zhou, Yi Zhang, Shunlong Tang, Zhiyang Zhang, Yong Liu, Baohong Tian, Xu Li, Yanlin Jia, Alex A. Volinsky, De Li, Qiujie Liu
Summary: The effects of Y addition on microstructure evolution in Cu-Sn-Ni-Zn-Ti alloys during hot deformation were investigated. Hot deformation experiments were conducted using a Gleeble-1500 simulator, deforming Cu-Sn-Ni-Zn-Ti and Cu-Sn-Ni-Zn-Ti-Y alloys at temperatures ranging from 550 to 950 degrees C and strain rates of 0.001-10 s-1. Constitutive equations were constructed and the hot deformation activation energy of the two alloys was calculated. It was found that the addition of 0.1 wt% rare earth Y element can promote dynamic recrystallization based on analysis of true stress-strain curves and electron backscattered diffraction images. Pole figures showed a texture change from {011}(112) Brass texture and {001}(100) Cube texture to {111}(211) R texture after Y addition. The microstructure and precipitates of the Cu-Sn-Ni-Zn-Ti alloy were analyzed, revealing the presence of Cu4Ti precipitates. Continuous dynamic recrystallization and discontinuous dynamic recrystallization were identified as the main recrystallization mechanisms in the Cu-Sn-Ni-Zn-Ti alloy.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Hongmei Jin, Renguo Guan, Di Tie
Summary: The dissolution of precipitates during cold deformation in aged Al-Si-Mg-Cu alloys plays a crucial role in the mechanical and conductive behavior of the alloys. Through nanometer scale observation, this study reveals that the accumulation of dislocations leads to the transformation of precipitates into smaller particles, Guinier-Preston zones, and solute atoms. The increasing number density of fractured precipitates and the cumulative lattice adsorption energy are the main driving forces behind the dissolution process. These findings are essential for improving the thermomechanical treatment technology of such alloys to enhance their mechanical and conductive performance.
Article
Chemistry, Physical
Aida Azizi, Shahab Zangeneh, Milad Mojtahedi, Sajad Rasaee
Summary: The present study investigated the hot deformation behavior of AA4032 alloy modified with Ni and Cu. The effect of extra copper and nickel on the microstructure and phase formation was studied. The best hot working condition was found to be at a temperature range of 720-780 K with a strain rate of 0.001-0.03 s1.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
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
Materials Science, Multidisciplinary
Zhilei Zhao, Zhou Li, Zhu Xiao, Muzhi Ma, Kerui Song
Summary: The hot compression deformation behavior of the Cu-0.45Cr-1.0Ni-0.28Si-0.14Co alloy was significantly affected by deformation temperature and strain rate, resulting in different microstructures and textures. The optimized hot deformation parameters for the alloy were found to be 800-850 degrees C at strain rates of 0.01-0.1 s(-1).
Article
Chemistry, Physical
Yigit Garip
Summary: This study investigates the effects of alloying elements on the microstructure and oxidation performance of high entropy alloys. It was found that the addition of Si improves the oxidation resistance, while Cu addition increases the thickness of the oxide scale. The alloying elements do not have a favorable effect on relieving internal oxidation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Yigit Garip
Summary: This study investigated the effects of alloying elements on the microstructure and oxidation performance of high entropy alloys, revealing that Si addition can enhance oxidation resistance, while Cu addition leads to thickening of the oxide scale and increased mass change. Si addition increases the amount of Ni-rich oxide in the oxide scale, and Cu addition results in a specific structure of the oxide scale in Cu-added and Si-Cu co-added HEAs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Chang-Hee Cho, Dal-Oh Kim, Kwangtae Son, Hyun-Soon Park
Summary: Al-Zn-Mg-Cu alloys exhibit the best mechanical properties among aluminum alloys, but suffer from poor formability during metalworking processes. This study investigates the high-temperature deformation behavior and mechanisms of an Al-Zn-Mg-Cu alloy, highlighting flow instabilities at higher strain rates and cooler temperatures, reduced recrystallization, diminished power dissipation efficiencies, and notable alpha-fiber generation.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Shiwei Tian, Zhenyu Yang, Siyuan Zhang, Zhiqian Liao, Yongjun Zhang, Yonggang Yang, Yulai Chen, Haitao Jiang
Summary: The hot deformation behavior of TiAl alloy was analyzed using true stress-strain curves and microstructure analysis. The results showed that the flow stress of TiAl alloy exhibited work hardening-dynamic softening characteristics, increasing with strain rate and decreasing with temperature. The flow stress of TiAl alloy under different deformation conditions was predicted based on the true stress-strain curves using a hyperbolic sinusoidal formula. Additionally, the effects of deformation temperature and strain rate on the microstructure evolution of TiAl alloy were revealed.
MATERIALS RESEARCH EXPRESS
(2023)
Article
Materials Science, Multidisciplinary
Shaobin Pan, Yongjie Wang, Jinxin Yu, Mujin Yang, Yanqing Zhang, Haiting Wei, Yuechao Chen, Junwei Wu, Jiajia Han, Cuiping Wang, Xingjun Liu
Summary: By utilizing machine learning for material design, a Cu-2.3Ni-0.7Co-0.7Si alloy with promising performance was developed, surpassing the properties of the C70350 alloy. This alloy has the potential to meet various working conditions and broaden the use range of alloys.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Xusheng Yang, Weijiu Huang, Xianghui Zhu, Ran Zhang, Fei Guo, Li Hu
Summary: The true stress-strain curves of AA2099 in the as-extruded state were determined through uniaxial compression tests under various hot deformation conditions. The study revealed a close relationship between the hot deformation activation energy (Q(HW)) and the precipitates strengthening, as characterized by electron back scatter diffraction (EBSD) and X-ray diffraction (XRD) phase analyses. Finite element method simulation results showed that AA2099 in the as-extruded state exhibited good workability, which was confirmed by the microstructure of the extruded products.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Yasin Alemdag, Sadun Karabiyik, Anastasia V. Mikhaylovskaya, Mikhail S. Kishchik, Gencaga Purcek
Summary: The hypoeutectic Al-7Si based alloy containing Zn and Cu was severely deformed using multidirectional forging (MDF) process at 200 degrees C in this study. The MDF process led to a refinement in alpha-Al grains and hard particles of crystallization origin, and also provided a method for formation of secondary precipitates within the alloy's microstructure. It was determined that MDF increased the tensile properties of the alloy but decreased its hardness, while converting brittle type fracture of homogenized alloy to ductile type.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Liang Cheng, Bin Zhu, Guang Yang, Fengming Qiang, Jinshan Li
Summary: This study investigated the deformation pattern and mechanical response of a Ti-43.5Al-8Nb-0.2W-0.2B alloy with refined fully lamellar microstructure. The results showed that the plastic anisotropy of the lamellar colonies led to bending deformation, slow recrystallization kinetics, and crystalline rotation. Numerical simulation demonstrated that the mechanical response of the colonies depended on the prior orientation, with continuous flow hardening observed at certain interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Lei Yu, Sida Jiang, Fuyang Cao, Hongxian Shen, Lunyong Zhang, Xu Gu, Heqian Song, Jianfei Sun
Summary: This paper investigates the hot compression behavior of co-spray-formed Al-Si/7075 bimetallic gradient alloys. The results show that the flow stress of deposited alloys decreases gradually with a decrease in strain rate and an increase in temperature, following the Arrhenius relationship. The deformation activation energy of the gradient alloy increases gradually from bottom to top in the height direction.
Article
Polymer Science
Alexander P. Kondratov, Anastasiya V. Lozitskaya, Vyacheslav N. Samokhin, Alex A. Volinsky
Summary: This study investigates the possibility of producing strain gauges with high sensitivity to mechanical stress using hard elastic films of isotactic polypropylene. The films exhibit thixotropic polymer softening during cyclic deformation (Patrikeev-Mullins effect) and the dry crazing effect. Three methods for preparing rigid elastic films using isotactic polypropylene are proposed, involving the deposition of an adhesive layer and an electrically conductive layer. The optimal manufacturing process for electrical sensors with high sensitivity is determined, including pre-cyclic deformation to form open micropores. A mathematical model is developed to predict the mechanical stress and/or the change in mechanical stress of the strain gauges based on the electrical resistance change in the conductive layer, with up to 700 relative strain sensitivity in the range of 6-35% strain.
JOURNAL OF POLYMER RESEARCH
(2023)
Article
Engineering, Manufacturing
Ekaterina S. Marchenko, Yuri F. Yasenchuk, Oibek Mamazakirov, Anatoly A. Klopotov, Gulsharat A. Baigonakova, Alex A. Volinsky, Sergey V. Gunter
Summary: Porous NiTi alloys with improved mechanical properties were obtained by self-propagating high-temperature synthesis (SHS) method in a closed reactor, using layer-by-layer combustion under a protective argon atmosphere. The maximum compressive strain of the porous NiTi alloys synthesized in the closed reactor was 34%, compared to 7% in the open gas flow reactor. The reaction products in the two-phase gas zone of peritectic crystallization were isolated Ti2Ni crystalline clusters in the TiNi matrix, as confirmed by X-ray diffraction, differential scanning calorimetry, scanning electron microscopy, energy dispersive spectroscopy, and optical microscopy.
MATERIALS AND MANUFACTURING PROCESSES
(2023)
Review
Materials Science, Multidisciplinary
Deye Xu, Meng Zhou, Yi Zhang, Shunlong Tang, Zhiyang Zhang, Yong Liu, Baohong Tian, Xu Li, Yanlin Jia, Alex A. Volinsky, De Li, Qiujie Liu
Summary: The effects of Y addition on microstructure evolution in Cu-Sn-Ni-Zn-Ti alloys during hot deformation were investigated. Hot deformation experiments were conducted using a Gleeble-1500 simulator, deforming Cu-Sn-Ni-Zn-Ti and Cu-Sn-Ni-Zn-Ti-Y alloys at temperatures ranging from 550 to 950 degrees C and strain rates of 0.001-10 s-1. Constitutive equations were constructed and the hot deformation activation energy of the two alloys was calculated. It was found that the addition of 0.1 wt% rare earth Y element can promote dynamic recrystallization based on analysis of true stress-strain curves and electron backscattered diffraction images. Pole figures showed a texture change from {011}(112) Brass texture and {001}(100) Cube texture to {111}(211) R texture after Y addition. The microstructure and precipitates of the Cu-Sn-Ni-Zn-Ti alloy were analyzed, revealing the presence of Cu4Ti precipitates. Continuous dynamic recrystallization and discontinuous dynamic recrystallization were identified as the main recrystallization mechanisms in the Cu-Sn-Ni-Zn-Ti alloy.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Meng Zhou, Yongfeng Geng, Yi Zhang, Yijie Ban, Xu Li, Yanlin Jia, Shengli Liang, Baohong Tian, Yong Liu, Alex A. Volinsky
Summary: A Cu-Co-Si-Ti-Ce alloy with medium electrical conductivity and excellent mechanical properties was obtained through vacuum melting process. The combination of multiple strengthening techniques resulted in high micro-hardness and strength. Co2Si and Co16Ti6Si7 phases exhibited coherent and semi-coherent interface relationships with the copper matrix, relieving interfacial stress and reducing interface energy. Solid solution strengthening, work-hardening, grain boundary strengthening, and precipitation strengthening contributed significantly to the alloy's strengthening.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Zhiyang Zhang, Meng Zhou, Yi Zhang, Shunlong Tang, Deye Xu, Baohong Tian, Xu Li, Yanlin Jia, Yong Liu, Alex A. Volinsky
Summary: Cu-Ti-Ni-Mg and Cu-Ti-Ni-Mg-Ce alloys were prepared by vacuum induction melting and subjected to hot deformation tests. The true stress-strain curves were obtained and constitutive equations were established. The addition of Ce reduced dislocation density and texture strength, promoted precipitation, and improved the deformation resistance of the alloys. The optimal processing parameters were determined based on the processing maps. The microstructure of the alloys was analyzed using EBSD and TEM, and CuNi2Ti precipitates were found in both alloys, with more in the Cu-Ti-Ni-Mg-Ce alloys.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Chemistry, Physical
Yanlin Jia, Yong Pang, Jiang Yi, Qian Lei, Zhou Li, Zhu Xiao
Summary: Thermal-mechanical treatment is crucial for high-strength and high-conductivity Cu-Ni-Si alloy synthesis. This study introduced a high-temperature/short-time pre-aging treatment to the thermomechanical processes of Cu-Ni-Si alloys and investigated its effects on the microstructure and properties. The results showed that pre-aging promoted the formation of a nanoscale microstructure, increased initial conductivity, and improved subsequent final aging. This research provides guidance for designing high-performance copper alloys and systematically investigates the strengthening mechanism and microstructure evolution.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Yufang Zhang, Xueping Gan, Zhu Xiao, Yanlin Jia, Wenting Qiu, Xiangpeng Meng, Yi Zhang, Lairong Xiao, Gai Sun, Tianyi Zhang
Summary: An ultrahigh strength Cu-9Ni-1.5Sn-0.8Si-0.1Al alloy was designed and the effect of multi-stage thermomechanical treatment on its microstructure and properties was explored. The alloy exhibited a tensile strength of 1150 MPa and remained electrical conductivity of 18.1 %IACS after the treatment. Nanoscale β-Ni3Sn, β-Ni3Si, and γ-Ni3Al precipitates were formed during the process. The precipitation strengthening contributed more than half of the alloy's ultra-high strength, and the multi-stage treatment improved its mechanical and electrical conductivity properties compared to single-stage aging treatment.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Crystallography
Chengdong Xia, Chengyuan Ni, Yong Pang, Yanlin Jia, Shaohui Deng, Wenhui Zheng
Summary: Coarse particles in the Cu-0.39Cr-0.24Zr-0.12Ni-0.027Si alloy were studied using scanning electron microscopy and transmission electron microscopy. Three types of coarse particles were identified: needle-like Cu5Zr intermetallic phase, nearly spherical Cr-9.Si-1(0).(9) intermetallic phase, and (Cu, Cr, Zr, Ni, Si)-rich lath complex particles. The crystallographic orientation relationships of the needle-like and nearly spherical coarse particles were also determined. The formation mechanism and role of coarse phases in Cu-Cr-Zr alloys were discussed, and suggestions were proposed for controlling the coarse phases in the alloys.
Article
Chemistry, Physical
Lei Li, Xueyan Yan, Bingzheng Yang, Sen Yang, Alex A. Volinsky, Xiaolu Pang
Summary: The thermal stability of AlN substrates coated with active metal was studied using first principles calculations. The results showed good thermal stability of the interface at elevated temperatures, and an orientation dependence of the interface elasticity was found. This study is helpful for the development of novel high-power microelectronic devices.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Polymer Science
Alexander P. Kondratov, Alexander A. Nikolaev, Victor G. Nazarov, Vladislav Y. Vereshchagin, Alex A. Volinsky
Summary: Counterfeiting and falsification of brands and products are global problems that impact the development and distribution of high-tech industrial and food products, as well as world economies. One solution to these problems is the development of original packaging with protection elements and labeling that prevent replication and forgery through printing or other methods. The use of new materials with unique optical properties and constantly evolving packaging manufacturing and labeling technologies is the most reliable way to safeguard against counterfeiting.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Review
Materials Science, Multidisciplinary
Hairui Xing, Ping Hu, Chaojun He, Xiangyang Zhang, Jiayu Han, Fan Yang, Run Bai, Wen Zhang, Kuaishe Wang, Alex A. Volinsky
Summary: This paper reviews the methods of strengthening molybdenum alloys with metal oxides and carbides and their effects on alloy structure and properties, providing guidance for the design of high-performance refractory molybdenum alloys.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Linhan Li, Yufang Zhang, Muzhi Ma, Yanlin Jia, Zhu Xiao, Jinhui Hu, Zhao Xin, Xinfeng Jiang, Xianfeng Liao, Xiangyu Yu
Summary: Cu-0.45Cr-0.15 Mg and Cu-0.45Cr-0.15Mg-0.02Si (wt.%) alloys show excellent comprehensive properties after multi-stage thermo-mechanical treatment, achieving high strength, high conductivity, and good elongation. Different forms of precipitation were observed in various aging stages, with Cu-0.45Cr-0.15Mg-0.02Si alloy showing more precipitation. The addition of Si promotes the precipitation of Cr and refines precipitation, preserving high density of dislocation and resulting in superior strength and conductivity.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Shuaikang Tang, Zhu Xiao, Yanjun Ding, Ying Li, Richu Wang, Yanlin Jia, Shen Gong, Zhou Li
Summary: The effect of multi-stage thermo-mechanical treatment on the microstructure and properties of a Cu-2Fe-0.5Ti alloy was investigated. The alloy exhibited improved mechanical properties and electrical conductivity after repeated thermal-mechanical treatment and aging. The precipitation of nano-scale Fe2Ti and gamma-Fe phases contributed to these improvements, along with the grain boundary and dislocation strengthening mechanisms.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(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)
