Review
Metallurgy & Metallurgical Engineering
Yujin Nie, Jianwei Dai, Xuan Li, Xiaobo Zhang
Summary: Corrosion is a major drawback for the wide applications of Mg alloys, with attention being drawn to the corrosion behaviors of alloys with stacking fault or long period stacking ordered structures. However, the corrosion mechanisms of these alloys remain unclear, calling for further research and improvement.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Materials Science, Multidisciplinary
Qianqian Jin, Xiaohong Shao, Shijian Zheng, Yangtao Zhou, Bo Zhang, Xiuliang Ma
Summary: Understanding the interface structure between strengthening precipitates and matrix in alloys at the atomic level is crucial for tailoring the mechanical properties. High-resolution scanning transmission electron microscopy was used to study the semi-coherent interfaces in Mg-Zn-Y alloys, revealing unique features such as Shockley partial dislocations and dissociated structures. The interaction between dislocation arrays and solute atoms plays a key role in the stability and morphology of these interfaces, influencing the lateral growth of LPSO phases in Mg alloys.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Ning Su, Qingchen Deng, Yujuan Wu, Liming Peng, Kun Yang, Qiang Chen
Summary: This paper investigates the dissolution, refinement, and re-precipitation of LPSO structure/SFs in an Mg-Gd-Zn-Mn alloy through hot extrusion. The results suggest that refinement is dominated by the misalignment and re-dissolution mechanisms, with dislocation slips and rapid solute atom diffusion playing key roles. The evolution model of LPSO structure/SFs during continuous dynamic recrystallization is proposed based on the findings.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Tsubasa Tokuzumi, Masatoshi Mitsuhara, Shigeto Yamasaki, Tomonari Inamura, Toshiyuki Fujii, Hideharu Nakashima
Summary: The excellent mechanical properties of Mg-Zn-Y alloys with a Mg-based long-period stacking ordered (LPSO) phase are attributed to the kink bands formed by plastic deformation. This study investigated the strengthening mechanism of kink bands in directionally solidified single-phase LPSO Mg85Zn6Y9 alloys. It was found that the presence of disclinations and dislocation pile-ups contribute to the kink-band strengthening. The study provides insights into the factors responsible for kink-band strengthening in LPSO-phase Mg alloys.
Article
Materials Science, Multidisciplinary
Jinshu Xie, Jinghuai Zhang, Zhi Zhang, Qiang Yang, Kai Guan, Yuying He, Ru Wang, Hao Zhang, Xin Qiu, Ruizhi Wu
Summary: Formation of solute-enriched stacking faults (SESFs) and their transformation into long period stacking ordered (LPSO) phase in Mg alloys have been achieved in this study. The role and advantages of SESFs and LPSO phase were confirmed by experimental observations. These findings are significant for the development of high-strength and anti-corrosion Mg alloys.
Article
Materials Science, Multidisciplinary
Jing Tian, Ge Yang, Zehua Lei, Jiehua Huang, Zhiwen Zhang, Jianhui Xie
Summary: The microstructure, biocorrosion resistance, and osteogenesis performances of as-cast Mg-Zn-Y-Mn alloys with different volume fraction of long period stacking ordered (LPSO) structure were investigated. 18R-LPSO phase can be formed in the alloys, and its volume fraction increases with the elevating Zn and Y content. The corrosion mechanism of the three alloys is dominated by the micro-galvanic effect between cathodic LPSO and anodic α-Mg, resulting in the accelerating corrosion rate with the increasing volume fraction of LPSO phase.
Review
Materials Science, Multidisciplinary
Mohammad Saleh Geshani, Parastoo Mahmoud Kalayeh, Amir Hossein Asadi, Hamed Mirzadeh, Mehdi Malekan, Massoud Emamy
Summary: Due to their excellent mechanical properties, magnesium alloys with long-period stacking ordered (LPSO) structures have gained significant attention. This overview article reviews the atomic structures, formation mechanisms, transformations, and morphology of LPSO phases in various Mg-based systems, as well as the effects of thermomechanical processing and severe plastic deformation techniques on the grain refinement and dispersion of LPSO phases. Furthermore, the application of friction stir processing and friction stir welding for LPSO-containing Mg alloys in terms of microstructural evolution, mechanical properties, and strengthening mechanisms is critically discussed. Future suggestions include studying the kinetics of LPSO phase formation, exploring emerging processing technologies, evaluating processing parameters, characterizing recrystallization mechanisms, and investigating superplasticity during hot deformation of LPSO-containing Mg alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Xiaodong Yang, Baolong Liu, Xiaojie Zhou, Weiying Huang, Liwei Lu, Xianzheng Lu, Yaru Liu
Summary: This study compares the performance of Mg-5Gd-3Y-2Zn-0.5Zr alloy with Mg-5Gd-3Y-1Zn-0.5Zr alloy. It is found that increasing the Zn content can induce the formation of more LPSO phases but has a negative impact on workability.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Nanoscience & Nanotechnology
A. E. Davis, J. R. Kennedy, D. Lunt, J. Guo, D. Strong, J. D. Robson
Summary: Preageing technique can significantly increase the hardness of magnesium alloys, reduce total ageing times, and provide a certain degree of customization of mechanical properties through control of precipitate habit plane and morphology. However, the effectiveness of this technique depends on the alloy system, with the focus on the fundamental processes of precipitate nucleation and phase evolution.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Sangwon Lee, Yejun Park, Jongbin Go, Young Mok Kim, Seok Su Sohn, Jiehua Li, Pyuck-Pa Choi
Summary: In this study, the evolution of LPSO phases in the as-cast Mg-6Gd-1Zn-0.6Zr alloy was investigated using TEM and APT. Two types of LPSO phases were formed, and their compositions were analyzed. The influence of LPSO phases on deformation behavior was also studied.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Nanoscience & Nanotechnology
Kaixuan Li, Yuanlin Zhuang, Ligong Zhao, Dongshan Zhao, He Zheng, Shuangfeng Jia, Ying Zhang, Peili Zhao, Jianian Gui, Jianbo Wang
Summary: The study investigated the interaction between deformation twinning and long period stacking ordered (LPSO) structures in an Mg-based alloy, showing the hindrance of LPSO structures and stacking faults to twinning. The in-situ experiments revealed that thick LPSO plates effectively retard the twinning propagation, and the closer spacing between LPSO structures further suppresses twin propagation. Additionally, the study discussed the resistance of stacking faults to twinning at the atomic scale, and the strengthening effect of LPSO structures on suppressing twinning growth.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
M. Lv, Q. Q. Jin, X. H. Shao, Y. T. Zhou, B. Zhang, X. L. Ma
Summary: In this study, the aging behavior of a Mg-10Gd-3Y-1.0Zn0.5Zr (wt.%) alloy with a long-period stacking ordered (LPSO) phase at 275 degrees C was investigated. The evolution of prismatic precipitates was examined using transmission electron microscopy (TEM). The results showed that the number and type of prismatic precipitates play a significant role in determining the hardness of the alloy.
PHILOSOPHICAL MAGAZINE
(2023)
Article
Metallurgy & Metallurgical Engineering
Xiangyu Wang, Chao He, Xue Li, Lang Li, Yongjie Liu, Qingyuan Wang
Summary: This study investigates the crack behaviors of magnesium alloys with a long-period stacking ordered structure under very high cycle fatigue conditions. It finds that the LPSO structure can inhibit the early crack propagation, leading to a higher fatigue crack propagation threshold.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Multidisciplinary
L. D. Xu, S. J. Ding, X. C. Cai, Y. Wu, Z. J. Li, K. K. Wen, S. W. Xin, B. R. Sun, M. X. Huang, T. D. Shen
Summary: This study reveals the oxidation behavior of Mg-Y-Zn LPSO phase at different temperatures through analysis and calculations. The results show that Y2O3 is mainly formed at a low temperature, while MgO is preferentially formed at a high temperature. This study is of great importance for the development of oxidation-resistant LPSO-containing Mg alloys.
Article
Chemistry, Physical
Shuaijun Ding, Xuecheng Cai, Zhongjie Li, Lidong Xu, Kangkang Wen, Jian Song, Hongwei Cui, Hui Yu, Tongde Shen
Summary: This study introduces a novel hierarchical LPSO architecture for Mg-Y-Zn based alloys, featuring ultrafine grained LPSO matrix, discrete LPSO lath domains and in-situ Y-O-Si nano-dispersoids. The combination of high strength, thermal stability and low density makes these alloys suitable for advanced structural applications, showing potential for lightweight high-strength Mg alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Guangli Bi, Siqi Chen, Jing Jiang, Yuandong Li, Tijun Chen, Xiao-Bo Chen, Duyao Zhang, Dong Qiu, Mark Easton
Summary: The effects of laser surface remelting (LSR) on microstructure and corrosion properties of as-cast Mg-12Dy-1.1Ni alloy were investigated. LSR treatment resulted in grain refinement and the formation of a continuous network of 18R-LPSO phase on dendrite boundaries, leading to improved corrosion resistance of the alloy.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Automation & Control Systems
Xiaoying Wang, Casey Jowers, Maciej Mazur, Alexander Buddery, Damon Kent, Alireza Bab-Hadiashar, Mark Easton
Summary: This article introduces a research work on the quality of IVF needles. By integrating interdisciplinary techniques and using virtual datasets and model analysis, a new solution is proposed to investigate and quantify the uncertainty in the quality standard of IVF needles.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Alistair Jones, Martin Leary, Stuart Bateman, Mark Easton
Summary: This study presents a structured approach to designing TPMS-like cellular solids and identifies the interactions between design parameters and evaluation metrics. The research found that the gyroid-surface structure provides the most flexibility and near-isotropic mechanical properties across a wide range of volume fractions.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Christian Hagenlocher, Patrick O'Toole, Wei Xu, Milan Brandt, Mark Easton, Andrey Molotnikov
Summary: This study investigates the changes in temperature field during L-DED process using infrared imaging and analyzes the impact on local grain structure of fabricated parts. It is found that power and layer deposition frequency are key parameters for adjusting heat accumulation. These findings offer a methodology for optimizing L-DED manufacturing processes and controlling local microstructure development.
Article
Engineering, Manufacturing
Christian Hagenlocher, Patrick O'Toole, Wei Xu, Milan Brandt, Mark Easton, Andrey Molotnikov
Summary: The accumulation of heat during additive manufacturing processes can result in shape deviations and inhomogeneous properties of the parts. This research provides an analytical description of the heat accumulation effect and proposes optimization strategies to reduce heat accumulation and increase productivity.
ADDITIVE MANUFACTURING
(2022)
Article
Engineering, Mechanical
Chengbo Zhu, Ian Fordyce, Shi D. Sun, Murugesan Annasamy, Daniel Fabijanic, Ken Short, Anna Paradowska, Martin Leary, Milan Brandt, Mark Easton
Summary: Laser directed energy deposition (L-DED) is an additive technology used for repairing mining components made of High Chromium White Iron (HCWI) on site. The addition of Ti powder and TiC powder to L-DED HCWI improved wear resistance, with Ti powder promoting in-situ TiC formation and TiC powder increasing the fraction of carbide and the amount of gamma-Fe matrix, leading to better wear resistance in high stress abrasion and pin-on-disk wear tests.
Article
Automation & Control Systems
Michael J. Benoit, Joel Galos, Kevin Heieis, Suming Zhu, Tom Wood, Paul G. Sanders, Elizabeth T. Hetrick, Bita Ghaffari, Adrian P. Mouritz, Mark A. Easton
Summary: One challenge in using X-ray imaging for post-process inspection of fusion welding is the lack of contrast between the fusion zone and base metal. This study develops novel filler wires with Ce additions to create grayscale contrast for X-ray imaging. The addition of Ce-containing precipitate particles enhances the contrast and enables superior quantitative inspection. This method effectively measures weld penetration by X-ray imaging.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Engineering, Manufacturing
Xin Tong, Guohua Wu, Mark A. Easton, Ming Sun, Qiman Wang, Liang Zhang
Summary: This work reports the highest yield strength and elongation in an Mg-Y-RE-Zr alloy produced by an additive manufacturing (AM) process. A combination of a large-diameter welding wire and pulsed current was used to inhibit the oxidation of WE43 alloy fabricated by quasi-directed energy deposition using electric arc (quasi-DED-Arc). The results show that the amount of Y2O3 in this work is only 2-5% of that of the sample produced by powder bed fusion (PBF) reported previously. Moreover, the variable solidification conditions and in-situ heat treatments induced by the multiple thermal cycles (MTCs) were found to result in an inhomogeneous microstructure along the building direction, which are responsible for the variations in mechanical properties. The WE43 alloy exhibits excellent mechanical properties due to the intrinsic heat treatment that occurs during the build process. The 8th layer exhibits a maximum tensile strength of 347 MPa and a good elongation of 7.1%, which exceeds the strength-ductility combinations for cast WE43 alloy. The strengthening mechanisms in different layers have been discussed. A physical model depicting the microstructural transformation during quasi-DED-Arc has been proposed based on the measured thermal cycling data and microstructure observations.
ADDITIVE MANUFACTURING
(2023)
Article
Materials Science, Multidisciplinary
David T. Rees, Chu Lun Alex Leung, Joe Elambasseril, Sebastian Marussi, Saurabh Shah, Shashidhara Marathe, Milan Brandt, Mark Easton, Peter D. Lee
Summary: In this study, two approaches, including TiB2 additions and optimization of LPBF process parameters, were used to suppress the formation of hot cracks in laser powder bed fusion (LPBF) additive manufacturing of 2XXX series Al alloys. High-speed synchrotron X-ray radiography and high-resolution synchrotron X-ray computed tomography (sCT) were used to monitor the LPBF process and measure the volume fraction of defects in the as-built samples. The results showed that adding TiB2 in Al-2139 reduced the volume of cracks by up to 79% and decreased the average length, breadth, and surface area of cracks.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
M. J. Benoit, M. A. Whitney, S. M. Zhu, D. Zhang, M. R. Field, M. A. Easton
Summary: This article investigates the effect of minor Fe additions on crack elimination in rapidly solidified Al alloy 6060 and provides insights into the underlying mechanism. The results show a decrease in cracking with increasing Fe content, and complete elimination of cracks in the 6060 + 0.5Fe sample. Microscopic analysis reveals the morphological changes of AlFeSi particles in the melt pools, and suggests that bridging of the Al matrix by these particles plays a crucial role in crack mitigation.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Suming Zhu, Indrajeet Katti, Dong Qiu, Joy H. Forsmark, Mark A. Easton
Summary: This study investigates the microstructure of PBF-LB AlSi10Mg and the effects of platform preheating and heat treatment on its mechanical properties. Preheating to 150°C improves strength, and T5 treatment further increases yield strength and tensile strength but reduces ductility. RST-T6 treatment enhances ductility while maintaining yield strength but decreases tensile strength.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Youjie Guo, Liang Zhang, Guohua Wu, Yixiao Wang, Fangzhou Qi, Xuanxi Xu, Xin Tong, Peisen Li, Guangxiao Ren, Yingjing Geng, Liangbin Li, Xunman Xiong
Summary: This study investigates the effect of Li addition on the hot-tearing susceptibility (HTS) of Al-Cu-Li alloys and finds that the experimental results are consistent with the predictions when Li content is below 2.5 wt pct. However, high Li-containing alloys show abnormally severe HTS due to the formation of Li-rich oxide inclusions, which obstruct liquid feeding.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Jiaqi Li, Duyao Zhang, Xiaobo Chen, Dake Xu, Dong Qiu, Fuhui Wang, Mark Easton
Summary: This paper investigates the effect of copper concentration on the microbiologically influenced corrosion (MIC) resistance of additively manufactured, ultrafine-grained Ti-Cu alloys. The results show that Ti-8.5Cu alloy exhibits the best corrosion resistance and MIC resistance due to its strong passive film and small surface potential difference between phases. The alloy has high strength and excellent antimicrobial properties, making it ideal for load-bearing applications in the marine environment.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Characterization & Testing
Papangkorn Jessadatavornwong, Ruwan Tennakoon, Alireza Bab-Hadiashar, Raj Das, Adrian P. Mouritz, Mark A. Easton
Summary: One challenge of using X-ray computed tomography (CT) is the detection limit of the smallest feature. This challenge can be addressed by generating defined size notches on the surface and investigating different X-ray CT parameters. The results show that the voxel size and scan duration are significant factors for defect detection and measurement accuracy.
NDT & E INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Xin Tong, Guohua Wu, Ming Sun, Qiman Wang, Liang Zhang, Wencai Liu
Summary: In this study, the purification and grain refinement of Mg-9Gd-3Y alloy were successfully achieved simultaneously by one-step refining at a high temperature, using a self-developed compound flux. A physical model was proposed to explain the interactions between the flux and the alloy melt, and the mechanism of grain refinement was analyzed. The generated RECl3 was found to enhance the purification efficacy and improve the ductility of the alloy.
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)
