Article
Engineering, Mechanical
Deepak Kumar, Nitya Nand Gosvami, Jayant Jain
Summary: The research investigated the temperature-dependent wear behavior of individual grains of solution treated AZ91 alloy with different crystallographic orientations. It was found that the wear resistance showed strong anisotropy at room temperature, but decreased significantly at 100 degrees C and was absent at 150 degrees C. Dynamic recrystallization was observed at higher temperatures and the evolved texture was independent of initial orientation.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Jingyu Jiang, Hongwu Chen, Xiaohang Cao, Feng Jiang, Menghan Zhang
Summary: The study on the effect of annealing temperature on an Al-Mg-Sc-Zr alloy processed by rolling and equal channel angular pressing (ECAP) showed that with an increase in ECAP strain, the grain size became finer and the microstructure more uniform. Vickers hardness increased with ECAP strain, and different samples exhibited varying degrees of hardness reduction after annealing.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Metallurgy & Metallurgical Engineering
N. Yu Yurchenko, N. D. Stepanov, G. A. Salishchev, V. N. Serebryany, N. S. Martynenko, E. A. Lukyanova, L. L. Rokhlin, N. Birbilis, S. Dobatkin, Y. Z. Estrin
Summary: This article provides a report on the effect of multiaxial deformation (MAD) on the structure, texture, mechanical characteristics, and corrosion resistance of the Mg-0.8 (wt.)% Ca alloy. MAD was shown to improve the microstructure and texture, resulting in significant enhancements in mechanical properties and corrosion resistance of the alloy.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Multidisciplinary
Jingyu Jiang, Feng Jiang, Menghan Zhang, Zhongqin Tang, Mengmeng Tong
Summary: The Al-6 Mg-0.4Mn-0.25Sc-0.1Zr extrusion rod underwent ECAP treatment to achieve nonuniform structure. After annealing at different temperatures, it was observed that the hardness of the samples decreased, with the 1P sample experiencing a faster decrease compared to the 0P sample, resulting in a hardness "upside down" phenomenon. The drastic recrystallization induced by high strain in the shear band was identified as the cause of these phenomena.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Physical
Jia Zhao, Chen You, Minfang Chen, Shaoyuan Lyu, Di Tie, Haifeng Liu
Summary: The grain size of AZ91 alloy decreases non-linearly with the increase of CaO particle size. The in-situ replacement reaction between CaO and Mg matrix improves mechanical properties and corrosion resistance, while nano-CaO particles affect the performance of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Xuanliang Chen, Minho O, Equo Kobayashi
Summary: This study applied cyclic deformation to an Al-Mg-Cu alloy and found that it increased the strength and ductility of the alloy by introducing dislocations and promoting cluster formation. The aging behaviors of the cyclically-strengthened (CS) samples were studied, and it was found that recovery and precipitation promotion occurred regardless of pre-aging. Pre-aged CS samples showed higher strength, but interestingly, after subsequent aging, the mechanical properties of pre-aged and non-pre-aged CS samples became the same.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Jun Zhao, Bin Jiang, Jun Xu, Weijun He, Guangsheng Huang, Fusheng Pan
Summary: This study discussed the microstructure, texture and mechanical properties of extruded Mg-xGd sheets (with x = 1.0, 1.5, 2.0 and 2.5 wt%). The fully recrystallized microstructure was observed in the extruded Mg-xGd sheets. The texture with [112 over line 1]-[202 over line 1] double fiber orientations was present in all the extruded sheets, and the texture weakening was observed with increasing Gd content. The tensile strength of the sheets gradually increased with an increase in Gd content, mainly due to the fine grain size and more Gd atoms, and the increase in ductility was related to the fine grain size, more Gd atoms and higher Schmid factor for basal slip. Compression twins and double twins played a key role in the formation of [112 over line 1]-[2021] double fiber texture during extrusion. Fine recrystallized grains with an unusual texture of [112 over line 1]-[202 over line 1] double fiber orientation preferentially formed in the undynamically recrystallized matrix with [101 over line 0] fiber orientation through continuous dynamically recrystallization and grew along well-defined bands. Further extrusion deformation resulted in a fully recrystallized microstructure with an unusual texture.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Nan Xu, Zike Ren, Zhengda Lu, Jun Shen, Qining Song, Jianhua Zhao, Yefeng Bao
Summary: Friction stir welding (FSW) is a commonly used technology for joining low melting point metals or alloys. In this study, large-load and low-speed FSW was used to improve the welding efficiency of an AZ61 Mg alloy, resulting in an ultrafine grain structure and enhanced strength and ductility of the welded joint.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Qiangbing Liu, Jiaxuan Ma, Shiyu Luan, Jinhui Wang, Shuai Yuan, Li Han, Peipeng Jin
Summary: The temperature damping capacities of Mg-3Al-1Zn-xSn alloys were investigated using a DMA, and the effects of Sn concentration and loading frequency were examined. The addition of Sn resulted in shifts in the damping peaks, indicating the influence of second phases near grain boundaries. The enhanced damping capacity at different frequencies was attributed to increased point defects and precipitates before 220°C, while microplastic internal friction dominated the damping mechanism in the later part of the test.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Metallurgy & Metallurgical Engineering
Ming Gao, Ke Yang, Lili Tan, Zheng Ma
Summary: In this study, fine-grained ZN20 alloy was obtained by combining ECAP with extrusion, resulting in improved ductility and corrosion resistance.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Multidisciplinary
Ting Yuan, Yuna Wu, Yang Liang, Qiuning Jiao, Quancheng Zhang, Jinghua Jiang
Summary: By accurately controlling the microstructure through ECAP and post-heat treatment, high strength and improved ductility were achieved in an Al-Mg-Li alloy with a high Li content. Refining coarse S-1 phases, uniformly precipitating fine metastable delta' phase particles, and maintaining ultrafine grains resulted in a combination of high strength (>450 MPa) and good ductility (>13.5%). The heat treatment method was also found to be applicable to other Al-Li alloys for adjusting microstructure and achieving an optimal combination of strength and ductility, expanding applications in the aerospace field.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Yun Feng, Yuanyuan Yang, Zongqi Xiao, Xianglong Meng, Guorong Zhou, Jinfeng Leng, Xinying Teng
Summary: The influence of aluminum on the mechanical properties and microstructure of Mg-Sn-Ca-Mn alloys was systematically investigated, and the addition of 1.5 wt% Al significantly increased the yield strength of the alloy. The extruded alloy exhibited a bimodal grain structure with dynamic recrystallized fine grains and coarse unrecrystallized grains. Additionally, the alloy with 1.5 wt% Al showed a significant enhancement in fiber texture.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Metallurgy & Metallurgical Engineering
Sen Wang, Bin-jiang Lv, Tie-wei Xu, Ning Cui, Feng Guo
Summary: The microstructure and mechanical properties of as-extruded and as-aged ATZ632 alloys were investigated. The as-extruded alloy showed excellent mechanical properties, while the as-aged alloy exhibited increased strength but decreased elongation. The aging process resulted in the formation of Mg4Zn7 and Mg17Al12 phases, and the precipitation after aging led to a decrease in elongation.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Materials Science, Multidisciplinary
Shuaiju Meng, Haoran Xiao, Zhanju Luo, Mingchi Zhang, Runlin Jiang, Xueqi Cheng, Haicun Yu
Summary: This study successfully developed a new Mg-6Bi-3Al-1Zn alloy with excellent mechanical properties. The high strength and good ductility of the alloy are attributed to the effective combination of various strengthening mechanisms, providing a new approach to developing high-performance Mg products for larger-scale industrial applications.
Article
Materials Science, Multidisciplinary
Zhenquan Yang, Aibin Ma, Bingqian Xu, Jinghua Jiang, Jiapeng Sun
Summary: The microstructure of a commercial AZ91 Mg alloy was modified through ECAP and aging, resulting in improved corrosion resistance. Aging treatment at 150 degrees Celsius for 60-90 hours produced fine beta phase precipitates that enhanced the micro-galvanic effect, leading to increased corrosion rates still lower than that of the as-cast alloy.
Article
Materials Science, Multidisciplinary
Huan Liu, Jia Ju, Xiao-Wei Yang, Yu-Hua Li, Jing-Hua Jiang, Ai-Bin Ma
Summary: A high-strength Mg-10Gd-2Y-1.5Zn-0.5Zr (wt%) alloy was prepared via eight passes of equal-channel angular pressing (ECAP), and its microstructures and mechanical properties were investigated. The results showed that the as-cast alloy consisted of various phases, while the ECAP alloy exhibited deformed and broken Mg-3(Gd,Y,Zn) phase. The refined Mg-3(Gd,Y,Zn) particles, dynamic recrystallization (DRX) grains, and kinked 14H LPSO phase contributed to the excellent mechanical properties of the ECAP alloy.
Article
Materials Science, Multidisciplinary
Jia Ju, Kang Yin, Mengfei Fang, Hong Cai, Huan Liu
Summary: N-type Bi-doped Mg-2(Si0.3Ge0.04Sn0.66)(1-x)Bi-x (0<= 0.03) compounds were successfully fabricated by solid-state reaction-spark plasma sintering (SPS). The prepared samples exhibited nearly phase pure Bi-doped solid solutions according to XRD results. The lattice constant and electrical conductivity increased with increasing Bi content, while the Seebeck coefficient decreased. The figure of merit (ZT) decreased at low temperatures and increased at high temperatures as the Bi content increased. At a temperature of 800K, the ZT value for x = 0.03 was about 1.3, compared to 1.1 for x = 0.01.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Qisheng Sun, Jiapeng Sun, Yantao Fu, Bingqian Xu, Ying Han, Jianqing Chen, Jing Han, Hao Wu, Guosong Wu
Summary: In this study, a thick GS surface layer with a thickness of 1.1 mm was successfully produced in Cu-38 wt.% Zn alloy using ultrasonic severe surface rolling technology. The results show that the volume fraction of the GS surface layer can be tailored to achieve a balance between strength and ductility in the alloy.
Article
Nanoscience & Nanotechnology
Xiaoru Zhuo, Wei Gao, Liyan Zhao, Shulin Zhao, Huan Liu, Zhichao Hu, Peng Zhang, Yuna Wu, Jinghua Jiang, Aibin Ma
Summary: A bimodal grain structured Zn-0.4Mg-0.02Mn alloy with superior strength-ductility synergy was successfully prepared by combined equal channel angular pressing (ECAP) and cold rolling. The alloy exhibits an ultimate tensile strength (UTS) of 334.4 MPa and an elongation (EL) of 40.0%, far surpassing the benchmark for medical implants. The mechanical superiority of the alloy is attributed to hetero-deformation induced (HDI) strengthening.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Letter
Materials Science, Multidisciplinary
Wen-Xin Wen, Lu-Yao Li, Zhen Li, Wen-Qing Ruan, Shuai Ren, Zhen-Xuan Zhang, Xiong Liang, Huan Liu, Jiang Ma
Article
Materials Science, Multidisciplinary
Changyang Liu, Jiapeng Sun, Guosong Wu
Summary: A simple solution-immersion method based on the concept of predesigned corrosion is developed to enhance the corrosion resistance of a magnesium-neodymium alloy, providing a feasible way to prepare a superhydrophobic surface on the alloy. The superhydrophobic surface exhibits self-cleaning behavior and good corrosion resistance in artificial hand sweat, offering new technical insights into the corrosion protection of magnesium alloys.
Article
Engineering, Chemical
Yuhua Li, Qiong Xu, Aibin Ma, Jin Zhang, Yalong Shen, Jinghua Jiang, Yaqing Jiang, Huan Liu
Summary: In this study, single pass rolling with varied rolling reductions was conducted on pre-homogenized AZ91 alloys and ECAP-processed AZ91 alloys. The effects of rolling reduction on the microstructures and mechanical properties of HR alloys and HER alloys were investigated. The results showed that the HER alloys possessed finer microstructures and superior mechanical properties which were influenced by the rolling reduction. The microstructures of the HER alloys became bimodal and the strength and elongation markedly improved with the increase in the rolling reduction. When the rolling reduction reached 70%, the HER alloys acquired a typical bimodal structure, contributing to their excellent comprehensive mechanical properties.
Article
Chemistry, Physical
Chao Sun, Huan Liu, Xiaoru Zhuo, Yuna Wu, Kai Yan, Jia Ju, Jinghua Jiang, Feng Xue, Jing Bai
Summary: A heterogeneous lamellar structure is achieved in Mg97Y2Zn1 alloy through large-ratio hot extrusion, resulting in improved mechanical properties compared to other Mg97Y2Zn1 alloys. The alloys in as-cast and as-annealed stages have ultimate tensile strengths of 426.5 and 471.4 MPa, and fracture elongations of 8.1% and 1.0% respectively. The increased strength in the as-annealed alloy is attributed to narrower spacing of <<-Mg and LPSO layers, refined DRX grains and LPSO particles, and a higher volume fraction of LPSO phase. However, the as-annealed alloy has poor ductility due to the easy aggregation of dislocations and stress in the narrower layers. It is suggested that tailored mechanical properties can be achieved through annealing and large-ratio hot extrusion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Chengwei Ji, Aibin Ma, Jinghua Jiang, Haoran Wu, Huan Liu, Sensen Guo, Yuxuan Yuan
Summary: A combined process of cold rolling and equal channel angular pressing (ECAP) was developed to improve the mechanical properties and localized corrosion of Zn-0.6Mg alloy for biodegradable implants. After cold rolling and ECAP processing, the alloy exhibited significantly improved strength and ductility compared to the as-cast alloy, with the alloy processed by 8-pass ECAP+CR75% (ER) showing the best mechanical properties. The eutectic phase fragmentation and grain refinement caused by cold rolling and ECAP process reduced the galvanic corrosion tendency of the alloy, resulting in improved corrosion resistance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Liyan Zhao, Xiaoru Zhuo, Wei Gao, Shulin Zhao, Huan Liu, Zhichao Hu, Peng Zhang, Yuna Wu, Jinghua Jiang, Aibin Ma
Summary: Zn-Ag alloys have great potential for use as biodegradable implant materials due to their harmless degradation products, suitable degradation rate, and excellent biocompatibility. However, their mechanical properties often do not meet the requirements for medical implants. This study achieved a bimodal grain structured Zn-0.5Ag-0.2Mg alloy with high strength and ductility through a combination of equal channel angular pressing (ECAP) and cold rolling (CR), surpassing the properties of alloys obtained through ECAP or CR alone. Hetero-deformation induced (HDI) strengthening plays a key role in obtaining the excellent mechanical properties. This work provides practical guidance for the development of high-performance Zn alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Jiapeng Sun, Bingqian Xu, Zhenquan Yang, Feihu Jiang, Keke Yang, Jing Han, Guosong Wu
Summary: A hierarchal micro-nano beta phase framework is proposed to improve the barrier effect of the second phase in high-aluminum-containing Mg-Al alloy, which effectively mitigates corrosion due to the formation of a brick-and-mortar structured corrosion product layer.
Article
Materials Science, Multidisciplinary
Liyan Zhao, Xiaoru Zhuo, Huan Liu, Jinghua Jiang, Aibin Ma
Summary: Zn-Ag alloys, a type of biodegradable material with potential medical applications, usually have inferior mechanical properties. In this study, a Zn-0.5Ag-0.08Mg alloy with high strength and ductility was obtained through equal channel angular pressing (ECAP). Different samples processed with ECAP for varying numbers of passes were evaluated for their microstructure and mechanical properties. The samples processed for 3P, 4P, 8P, and 12P exhibited mechanical properties that meet the application requirements, with the sample processed for 4P achieving the highest ultimate tensile strength (UTS) of 388.1 MPa and excellent elongation (EL) of 45.3%.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Bangjun Li, Jiapeng Sun, An Xu, Bingqian Xu, Lingling Wang, Jie Yuan, Guosong Wu
Summary: It is still challenging to simultaneously improve the mechanical properties and corrosion resistance of Mg alloys through one strategy. In this paper, high-density nanoprecipitates are introduced in a Mg alloy to enhance its strength and corrosion resistance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Jingbo Li, Huan Liu, Jun Yin, Yuna Wu, Kai Yan, Jia Ju, Hang Teng, Jinghua Jiang, Jing Bai
Summary: Zinc alloys have the potential to be biodegradable implant materials due to their moderate corrosion rates, but the poor mechanical properties of pure zinc restrict their application. In this study, a Zn-0.1Mg-0.02Mn alloy was rolled at room temperature to different reductions. The alloy with 80% reduction showed the best mechanical performance, meeting the requirements for biomedical implant materials with an ultimate tensile strength of 397.7 MPa and an elongation of 15.9%. Grain refinement played a major role in enhancing the strength, with different deformation mechanisms observed for basal-oriented and non-basal-oriented grains.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Chao Sun, Huan Liu, Ziyue Xu, Yuna Wu, Kai Yan, Jia Ju, Jinghua Jiang, Feng Xue, Jing Bai, Yunchang Xin
Summary: In this study, a composite deformation strategy was designed to refine the 18R LPSO phase in a Mg97Y2Zn1 alloy into the sub-micron range, resulting in significantly enhanced mechanical properties. The 16P-HE alloy exhibited the best mechanical properties, with contributions mainly from the sub-micron 18R phase and α-Mg grains.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
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)
