Article
Nanoscience & Nanotechnology
Jianyue Zhang, Peng Peng, Alan A. Luo, Jia She, Aitao Tang, Fusheng Pan
Summary: Dynamic precipitation and grain refinement occurred during low temperature extrusion of ZK60 alloy, leading to improved mechanical properties such as tensile strength and elongation. The presence of dynamic precipitates promoted nucleation of new grains and enhanced the alloy's strength and ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Zhao Yang, Chao Xu, Taiki Nakata, Shigeharu Kamado
Summary: This study investigated the effect of extrusion parameters on the microstructural evolution and tensile properties of a Mg-8.0Gd-4.0Y-1.0Mn-0.4Sc alloy. Different DRX mechanisms, such as DDRX and CDRX, were identified, and the alloy with larger extrusion ratio exhibited smaller DRXed grains and a high number of fine precipitated particles. The alloy extruded at 400°C and ratio of 20:1 showed superior strength, while alloy extruded at 450°C and ratio of 10:1 exhibited higher elongation to failure. The enhanced strength was attributed to strong basal texture, refined DRXed grains, and dense distribution of fine particles.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Guoqi Chang, Wei Li, Guisheng Deng, Yuandong Liu
Summary: The effects of pre-twinning on the microstructure and dynamic compression properties of non-aged and artificially aged Mg-Y-Nd-Gd-Zr alloys were investigated. Pre-deformation in the T3 alloy generated high-density dislocations and deformation twins, while artificial aging in the T8 alloy resulted in a decrease in dislocation density and the appearance of precipitates. Evaluation of dynamic compression properties showed that the T8 alloy had a higher compressive yield strength compared to the T61 alloy. However, their ultimate compressive strengths were similar due to the synergistic effect between dislocations, twin boundaries, and precipitates. These findings suggest that the pre-twinning approach can improve the strength of magnesium alloys.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Yu-Ying He, Gang Fang
Summary: In this study, the dynamic precipitation (DP) of Mg17Al12 phase during the deformation of an Mg-Al-Zn-RE alloy was investigated. The effects of temperature and strain rate on the volume fraction, number density, and average size of Mg17Al12 precipitates were studied. Phenomenological models linking the precipitation parameters with deformation conditions were established and validated. The pinning effect of DP on grain growth and the influence of temperature on DRXed grain size were also discussed. The results provide insights into the understanding of microstructural evolution in the Mg-Al-Zn-RE alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Metallurgy & Metallurgical Engineering
E. P. Silva, R. H. Buzolin, F. Marques, F. Soldera, U. Alfaro, H. C. Pinto
Summary: Mg-Zn-Zr (ZK) alloys have high mechanical strength, but are susceptible to hot cracking due to the formation of low melting point precipitates. Adding rare earths can improve the alloy's performance. Ce-base mischmetal addition can enhance hot rolling behavior, refine grain size, and improve mechanical properties of ZK60 alloy.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Crystallography
Honglin Zhang, Zhigang Xu, Laszlo J. Kecskes, Sergey Yarmolenko, Jagannathan Sankar
Summary: The study investigated the effect of extrusion temperatures on Mg-1.3Zn-0.5Ca alloys, finding that higher temperatures led to larger and more dynamic recrystallized grains. The alloys extruded at different temperatures showed varying mechanical properties, with improved elongation at 400 degrees C but higher ultimate tensile strength and yield strength at 300 degrees C.
Article
Chemistry, Physical
Yuanqing Chi, Jinwei Liu, Zhijie Zhou, Shouzhong Wu, Weiqing Liu, Mingyi Zheng
Summary: This study mainly investigates the microstructure, texture, and mechanical properties of Mg-Gd-Y alloys (Mg-8.5Gd-2.5Y-0.3Zr (wt%) (0Zn) and Mg-8.5Gd-2.5Y-0.5Zn-0.3Zr (wt%) (0.5Zn) alloys) under indirect extrusion at different temperatures. The addition of 0.5 wt% Zn promotes the dynamic precipitation of beta-Mg5RE phases, resulting in a well-distributed distribution in the 0.5Zn alloy compared to a local distribution in the 0Zn alloy. The presence of zinc and the extrusion temperature influence the texture formation and mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Heshuai Yu, Hongbao Cui, Zhengpeng Yang, Zhichao Xu
Summary: This study discusses the effect of extrusion temperatures on the microstructure, second phases particle, texture, and mechanical properties of the Mg-5Sn -1Si-0.6Ca alloy. The results show that decreasing the extrusion temperature benefits dynamic precipitation and grain refinement. The strength and plasticity of the alloy are simultaneously improved by the method of solid solution + lowtemperature extrusion.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Xinsheng Huang, Mingzhe Bian, Yasumasa Chino
Summary: The effects of aging precipitation on microstructure, deep drawing formability, and tensile properties of Mg-6Al-1Zn alloy sheets were investigated. It was found that aging at high temperature significantly improved the deep drawability, resulting in an increased limiting drawing ratio. This improvement can be attributed to the prevention of cracking at the edge of the drawn cup by restricting the growth of tensile twins and basal slip through aging precipitation.
SCRIPTA MATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
Xiang Jiang, Sijia Hu, Limin Wang, Xiaohu Liu, Xuyue Yang, Qinghuan Huo
Summary: The dependence of dynamic recrystallization behavior of magnesium on the Gd content was studied in this research. The study showed that adding Gd content significantly delayed the progress of recrystallization and influenced the dominant recrystallization mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Yuanxiao Dai, MengHan Xiao, Yaobo Hu, Yan Yang, Bin Jiang, Tianxu Zheng, Li Dong, Baoqing Yang, Changyong Zheng
Summary: By designing extrusion parameters, the Mg-0.12Ca-0.08Ba alloy underwent grain refinement and texture control, resulting in the best performance of the extruded samples with different crystallographic orientations.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Shiqi Li, Qinghuan Huo, Sijia Hu, Chunyu Wang, Zhirou Zhang, Yuxiu Zhang, Tao Chen, Xuyue Yang
Summary: The effects of original orientations on the dynamic recrystallization behaviors of a hot-rolled Mg-1.0wt% Ca plate were investigated. It was found that dynamic recrystallization occurred more easily in the normal direction sample at the same temperature. As the temperature increased, the area fraction and size of the dynamic recrystallized grains improved faster in the rolling direction sample. The Mg-1.0wt%Ca alloy significantly postponed both the continuous and discontinuous dynamic recrystallization processes compared to commercial Mg alloys.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Jiyeon Kang, Nokeun Park, Jin-Kyung Kim, Joo Hyun Park
Summary: The study focuses on microstructures and mechanical properties of high entropy alloy (CoCrFeMnNi)95.2Al3.2Ti1.6 after homogenization and cold-rolling, followed by annealing at various temperatures. The annealing process revealed the presence of different phases based on temperature, leading to changes in grain size, strength, and ductility. Fully recrystallized materials at 900°C exhibited lower grain size but higher ductility due to second phase particles, impacting the yield strength significantly.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Wei Liu, Yu Su, Yuntao Zhang, Liwen Chen, Hua Hou, Yuhong Zhao
Summary: This study investigates the variation in LPSO structures, dynamic recrystallization, and mechanical performance of Mg89Y4Zn2Li5 alloys fabricated at different extrusion speeds and die angles. It is found that the block 18R LPSO structures elongate while the lamellar 14H LPSO structures dissolve. The hot-extruded alloys exhibit a full DRX microstructure, and the DRX grain size decreases with decreasing extrusion speed and die angle. The Mg89Y4Zn2Li5 alloy achieves an excellent strength-ductility balance at a low extrusion speed and small die angle.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Nanoscience & Nanotechnology
Adrianna Lozinko, Reza Gholizadeh, Yubin Zhang, Uta Klement, Nobuhiro Tsuji, Oleg Mishin, Sheng Guo
Summary: The microstructure and mechanical properties of a 90% cold-rolled AlCoCrFeNi2.1 eutectic high-entropy alloy undergo changes during annealing at 800 degrees C. Recrystallization occurs faster in the FCC phase compared to the B2 regions, resulting in increased grain size. Partially recrystallized samples produced by annealing exhibit a combination of high yield strength and good ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Yi-dan Fan, Kun-kun Deng, Cui-ju Wang, Kai-bo Nie, Quan-xin Shi
Summary: Pure titanium particles reinforced Mg-6Zn-0.2Ca magnesium matrix composites were successfully fabricated and their mechanical properties were studied. The results showed that the titanium particles promoted dynamic recrystallization of the matrix alloy, refining the size of MgZn2 phases and resulting in high yield strength and ultimate tensile strength in the composite. However, the work hardening rate of the composite decreased during plastic deformation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
J. H. Zhang, K. B. Nie, K. K. Deng, X. Z. Han, Z. D. Wang
Summary: The effect of adding trace elements of Nd to Mg-3Zn-0.5Zr alloy was studied. It was found that Nd content significantly influenced the composition and distribution of the second phase in the alloy. The introduction of Nd resulted in a decrease in grain size and grain boundary strengthening, as well as an increase in texture intensity. High strength alloys with low alloying content and traditional extrusion processes were obtained.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Ren Jie Dai, Kun Kun Deng, Cui Ju Wang, Kai Bo Nie, Guo Wei Zhang, Wei Liang
Summary: AE alloy and AS alloy were obtained by extrusion and solution treatment of Zn-rich aluminum alloy. AE alloy has fine grains and high precipitate content, while AS alloy has increased grain size and dissolved precipitates. Both alloys show improved mechanical properties, but AE alloy has higher work hardening capacity.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Wei Li, Kaibo Nie, Zhilong Liu, Kunkun Deng, Yanan Li, Xili Tong
Summary: The addition of SiC nanowires affected the microstructure and mechanical properties of Mg-2Zn-0.1Y matrix composites under different hot extrusion parameters. Stengthening mechanism was analyzed and the results showed significant changes in grain size and volume fraction with variations in extrusion temperature and speed.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Xin Lv, Kun-Kun Deng, Cui-Ju Wang, Kai-Bo Nie, Quan-Xin Shi, Wei Liang
Summary: The addition of trace submicron SiC particles can promote the formation of lamellar (α+β) structure and improve the corrosion resistance of the alloy. However, the precipitation of granular β-Mg17Al12 phase with increased SiCp content leads to a gradual decrease in corrosion resistance.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Zedong Wang, Kaibo Nie, Kunkun Deng, Jungang Han
Summary: A low-alloyed Mg-2Zn-0.8Sr-0.2Ca matrix composite reinforced by TiC nano-particles was successfully prepared by semi-solid stirring under the assistance of ultrasonic, and then the as-cast composite was hot extruded. The finest grain size of similar to 0.30 mu m is obtained in the sample extruded at 200 degrees C and 0.1 mm/s. The ultra-high mechanical properties (ultimate tensile strength of 480.2 MPa, yield strength of 462 MPa) are obtained after extrusion at 200 degrees C with a rate of 0.1 mm/s. Among all strengthening mechanisms for the present composite, the grain refinement contributes the most to the increase in strength. A mixture of cleavage facets and dimples were observed in the fracture surfaces of three as-extruded nanocomposites, which explain a mix of brittle-ductile fracture way of the samples.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Hongwei Li, Kaibo Nie, Zhilong Liu, An Yang, Kunkun Deng
Summary: TiCp/Mg-Al-Ca-Mn nanocomposites were produced through extrusion, which resulted in refined grains and changes in the second phase. The composites exhibited specific texture composition and their properties were influenced by the degree of dynamic recrystallization and precipitates. The nanocomposites showed excellent mechanical properties, which were enhanced by various strengthening mechanisms.
Article
Materials Science, Multidisciplinary
Shilei Wang, Kaibo Nie, An Yang, Kunkun Deng
Summary: The influence of different Ca/Al mass ratios on the microstructure, phase evolution, and mechanical properties of Mg-Al-Ca-Mn alloys was investigated. It was found that increasing the Ca/Al ratio led to the transformation of the secondary phases and refinement of the grain size. The secondary phases not only refined the grains but also hindered dislocation migration, resulting in the strengthening of the alloy.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Nanoscience & Nanotechnology
Mei-li Hou, Kun-kun Deng, Cui-ju Wang, Kai-bo Nie, Quan-xin Shi
Summary: The effects of the VR/VD ratio on the work hardening and softening behaviors of Mg-6Zn-1Gd-0.12Y alloy were studied. It was found that increasing the VR/VD ratio reduced the work hardening rate in stage III, while increasing it in stage IV. A low VR/VD ratio improved the work hardening rate in stage III, while a high VR/VD ratio improved it in stage IV. With an increased VR/VD ratio, the softening behavior of the alloy increased in stage III and decreased and then increased in stage IV.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Electrochemistry
Xin Lv, Kunkun Deng, Cuiju Wang, Kaibo Nie, Quanxin Shi, Haoyi Niu
Summary: Through immersion, electrochemical, and Mg-air battery tests on extruded AZ91 alloy and 0.5 μm SiCp (0.5 vol.%)/AZ91 composite, it is found that the introduction of submicron SiCp can reduce the corrosion rate and improve the discharge performance of the alloy. This improvement is attributed to the refined grains, precipitates, and weakened basal texture resulting from the addition of submicron SiCp. This study provides new ideas for achieving the synergistic improvement of corrosion resistance and discharge performance of magnesium alloy.
ELECTROCHIMICA ACTA
(2023)
Article
Materials Science, Composites
Li Zhang, Kun-kun Deng, Kai-bo Nie, Cui-ju Wang, Chao Xu, Quan-xin Shi
Summary: GFs/ZX50 (graphite flakes/Mg-5Zn-0.5Ca) composites were successfully fabricated by ultrasonic-assisted semi-solid stirring followed by extrusion process. The microstructure observation shows that hot extrusion effectively regulates the orientation of GFs. The GFs/ZX50 composites exhibit excellent thermal conductive property of -145.6-174.2 W/(m center dot K) and high yield strength of -386.8-407.8 MPa. The excellent strength-thermal conductivity synergy of the composites is mainly attributed to the highly orientated GFs, the clean Mg-graphite interface, the ultrafine grains, and the MgZn2 nano-precipitates.
COMPOSITES COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Quan-xin Shi, Cui-ju Wang, Kun-kun Deng, Yi-dan Fan, Kai-bo Nie, Wei- Wei-Liang
Summary: The present work investigates the impact of bimodal microstructure on the work hardening and softening behaviors of Mg-6Zn-1Gd-0.3Ca alloy. The study also discusses the grain refinement mechanism through EBSD analysis. The results reveal that the work hardening capacity of the alloy increases with the volume fraction of fine recrystallized grains due to increased dislocation storage rate caused by grain coarsening. The stress reduction value in the early stage of deformation is the highest for the alloy with fine recrystallized grains, providing a greater driving force for softening effect. However, the stress reduction values decrease with the increase of fine recrystallized grains in the later stage of deformation. Furthermore, the analysis indicates that dynamic recrystallization plays a significant role in the formation of fine recrystallized grains in the Mg-6Zn-1Gd-0.3Ca alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Xin Lv, Kunkun Deng, Cuiju Wang, Kaibo Nie, Xiaogang Wang, Quanxin Shi
Summary: The effect of submicron SiCp content on the corrosion resistance of homogenized AZ91 alloy was investigated. The results showed that the addition of 0.5 vol.% submicron SiCp significantly improved the corrosion resistance, reducing the weightless corrosion rate from 4.44 mm/y to 0.68 mm/y. However, the corrosion resistance decreased with increasing submicron SiCp concentration.
MATERIALS TODAY COMMUNICATIONS
(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)
