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
Materials Science, Multidisciplinary
Xingyu Pan, Chonglin Jia, Zhiyong Ji, Chunlei Qiu
Summary: Direct hot forging of heavily-alloyed Ni-based superalloy castings often leads to cracking due to macro-segregation. To solve this problem, hot extrusion is proposed as an alternative technology for processing these superalloys. In this study, a cast and wrought Ni-based superalloy GH4151 was successfully processed by hot extrusion without cracking, and extensive twinning played a crucial role in accommodating plastic deformation. Dynamic recrystallization occurred, resulting in significant grain refinement. The hot-extruded GH4151 exhibited superior mechanical properties compared to state-of-the-art disc superalloys and could be further improved with heat treatment.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Rubia Hassan, Kantesh Balani
Summary: The sintering mechanisms of ZrB2 and SiC-reinforced ZrB2 ceramic composites were investigated by determining the activation energy of densification in different temperature ranges. The results showed that the addition of SiC changed the prominent densification mechanism and impacted the mechanical performance with systemic increase of sintering temperature.
MATERIALS CHARACTERIZATION
(2021)
Article
Nanoscience & Nanotechnology
Yuhang Guo, Xuancheng He, Yibo Dai, Qianhao Zang, Xuguang Dong, Zhenya Zhang
Summary: This study investigates the effects of four different hot extrusion processes on the microstructure, texture, and mechanical properties of Mg-5Li-3Sn-2Al-1Zn alloys. The results show that the magnesium alloy undergoes dynamic recrystallization during the hot extrusion processes, leading to a significant refinement in grain size and improved mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Ceramics
Yumin An, Kun Wan, Yi Yang, Yongna Jia, Yehong Cheng
Summary: In this study, biomimetic Cf/ZrB2-SiC ceramic composites with bouligand structures were successfully fabricated by combining precursor impregnation, coating, helical assembly, and hot-pressing sintering. Analysis of the microstructures and carbon fiber content revealed that the coated ceramic layer can heal cracks and improve the mechanical properties, while the mechanical properties can be tuned by the carbon fiber content. This research is of great importance for the development of biomimetic ceramic composites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Metallurgy & Metallurgical Engineering
Sang-Cheol Jin, Jong Un Lee, Jongbin Go, Hui Yu, Sung Hyuk Park
Summary: This study investigates the effects of Sn addition on the microstructural characteristics and mechanical properties of an extruded Mg-Bi binary alloy. The results show that the addition of Sn significantly decreases the average grain size and improves the tensile strength and ductility of the alloy. These improvements are attributed to grain refinement, Sn solute atoms, and increased dislocation density.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Ceramics
Yuhong Jiao, Jianfeng Zhu, Jinlong Ge, Chunjie Shi, Yanfang Tai, Yicheng Huang, Fen Wang, Waras Abdul
Summary: The ceramic composites were designed through regulation of composition and temperature. The phase and microstructure were studied under different alloy addition and heating temperature using XRD, SEM, and TEM. The products showed similar compositions due to high oxidation resistance of SiC. Alloy addition promoted the oxidation of SiC, leading to the formation of cordierite, mullite, and forsterite. By controlling temperature or adding alloy, different phases can be obtained. The bending strength was enhanced by eutectic melting, which increased with alloy addition and temperature elevation.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Pradyut Sengupta, Siba Sundar Sahoo, Arjak Bhattacharjee, Suddhasatwa Basu, Indranil Manna
Summary: The addition of TiC can reduce the sintering temperature of ZrB2-20% SiC composite, increase the density and mechanical properties, with the solubility limit of TiC in the sintered ZrB2 lying between 5% and 10%. The elastic modulus values of the TiC-added composites agree well with experimentally determined values, indicating highly dense and defect-free materials. Residual stresses in the matrix phase are tensile and decrease with increasing TiC addition, while in the reinforcement phase, they are compressive. TiC-added composites exhibit better mechanical properties than the base composite.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Rubia Hassan, R. Sarvesha, Kantesh Balani
Summary: The role of carbon nanotubes (CNTs) in the solid solutioning of SiC reinforced HfB2 + ZrB2 has been studied. Incomplete solid solutioning was observed in the presence of 20% SiC under the given sintering conditions. However, the addition of CNTs resulted in the formation of heterogeneous solid solution, as confirmed by SEM, TEM, EDS analysis, and XRD peak de-convolution. The presence of CNTs and defect structures in the SiC phase were attributed to compressive stresses generated during the cooling process after sintering. With CNTs reinforcement, the micro-hardness and elastic modulus increased, while the oxidation resistance decreased.
MATERIALS CHARACTERIZATION
(2023)
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
Eid M. Alosime, Mohammed S. Alsuhybani, Mohammed S. Almeataq
Summary: The study aims to develop a structural ceramic for high-temperature applications using SiC as matrix composites and analyzing the plasma spray coating of SiC and ZrB2. The results show a great potential for the studied material in protecting against high-temperature oxidation and in a wide variety of aerospace applications.
Article
Materials Science, Ceramics
Bo-Wen Chen, De-Wei Ni, Jun Lu, Fei-Yan Cai, Xue-Gang Zou, Yu-Dong Xue, Hai-Jun Zhou, Yu-Sheng Ding, Shao-Ming Dong
Summary: Microstructure and mechanical behaviors of 2D-C-f/ZrB2-SiC composites were examined, showing the critical role of interface structure in determining mechanical properties. The composites displayed varied mechanical behaviors at different temperatures.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Manish Patel, Kurapati Pavan Kumar
Summary: C-f-ZrB2 and C(f)-ZrB2-SiC ultrahigh-temperature ceramic matrix composites were successfully produced using slurry infiltration and hot pressing. The optimized mixing time and solid loading of the slurry resulted in agglomerate-free composites with a porous matrix. These composites exhibited a nearly completely dense matrix layer and non-brittle properties.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Y. H. Chen, X. Y. Gao, K. B. Nie, Y. N. Li, K. K. Deng
Summary: By comparing the effects of different sizes of SiC on composites, this study found that SiC nanowires can effectively hinder grain growth, and an increased number of SiC particles can promote recrystallization, thereby improving the mechanical properties of the composites.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
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
Nanoscience & Nanotechnology
Ahmad Mirzaei, Peter D. Hodgson, Xiang Ma, Vanessa K. Peterson, Ehsan Farabi, Gregory S. Rohrer, Hossein Beladi
Summary: This study investigated the influence of parent austenite grain refinement on the intervariant boundary network in a lath martensitic steel. It found that refining the parent austenite grain led to a decrease in the fraction of certain boundaries in the martensite and an increase in the connectivity of low energy boundaries, ultimately improving the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
N. L. Church, C. E. P. Talbot, L. D. Connor, S. Michalik, N. G. Jones
Summary: Metastable beta Ti alloys based on the Ti-Nb system have attracted attention due to their unique properties. However, the unstable cyclic behavior of these alloys has hindered their widespread industrial use. Recent studies have shown that internal stresses, including those from dislocations, may be responsible for this behavior. This study demonstrates that inter-cycle thermal treatments can mitigate the unstable cyclic behavior, providing a significant breakthrough in our understanding of Ti-Nb superelastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Di Zhao, Chenchen Zhao, Ziyang Xiu, Jiuchun Yan
Summary: This study proposes a novel strategy for achieving the bonding of SiC ceramic and Al alloy using ultrasound. The ultrasound promotes the dissolution of Al into the solder, activating the solder and triggering the interfacial reaction between SiC ceramic and solder. With increasing ultrasonic duration, the bonding between SiC and Al transitions from partial to full metallurgical bonding.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Kang Du, Yang Zhang, Guangda Zhao, Tao Huang, Liyuan Liu, Junpeng Li, Xiyu Wang, Zhongwu Zhang
Summary: This paper systematically investigated the evolution of microstructure in Fe-Ni-Co-Al polycrystalline alloys and its effects on mechanical properties. The results revealed that the migration of grain boundaries in different processes is driven by different factors, which impacts the grain orientation and precipitate formation. In the process of directional recrystallization, grains with specific orientations grow in the grain boundary region and form the dominant orientation, while grains with lower migration rate form the minor orientation. The alloy produced through directional recrystallization exhibited good recoverable strain and superelastic strain, while the alloy produced through solid solution treatment showed no evident superelastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Edohamen Awannegbe, Liang Chen, Yue Zhao, Zhijun Qiu, Huijun Li
Summary: This study employed laser metal deposition to additively manufacture Ti-15Mo wt% alloy, and subsequently subjected it to post-fabrication uniaxial thermomechanical processing. The results showed that different zones in the microstructure remained after processing, and deformation mechanisms mainly involved slip and martensite formation. The compressive mechanical properties were found to be dependent on strain rate, with higher flow stress and compressive strength observed at higher strain rates. Grain structure homogenisation was not achieved, leading to anisotropic tensile properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Reza Khatib Zadeh Davani, Enyinnaya George Ohaeri, Sandeep Yadav, Jerzy A. Szpunar, Jing Su, Michael Gaudet, Muhammad Rashid, Muhammad Arafin
Summary: This research aims to investigate the effect of roughing and finishing reductions on crystallographic texture. The results show significant heterogeneity in the centerline region, with higher intensity of certain textures. Drop Weight Tear Test indicates that steel specimens with lower and medium reductions exhibit superior low-temperature impact toughness compared to steel with higher reductions. The electrochemical hydrogen charging experiments confirm the presence of internal hydrogen cracks only in steel with lower and medium reductions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Flavio De Barbieri, Denis Jorge-Badiola, Rodrigo Allende, Karem Tello, Alfredo Artigas, Franco Perazzo, Henry Jami, Juan Perez Ipina
Summary: This study examines the effect of Cr additions on the mechanical behavior of TWIP steel at temperatures ranging from 25°C to 350°C. The results indicate that different temperature-dependent strengthening mechanisms, including mechanical twinning, Dynamic Strain Aging, and slip bands, are at play. The stacking fault energy (SFE) influences the percentage of mechanical twinning, which in turn affects the strain hardening rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Hanlin Peng, Siming Huang, Ling Hu, Bingbing Luo, Liejun Li, Ian Baker
Summary: This study explores the weldability, microstructures, and mechanical properties of two L1(2)-nanoparticle-strengthened medium-entropy alloys after electron beam welding (EBW). The results show that strong yet ductile defect-free joints were produced, with larger grain sizes in the fusion zones compared to the heat-affected zones and base materials. Both EBWed MEAs exhibited high yield strengths, high ultimate tensile strengths, and good fracture strains at 77 K. The V-doping improved the cryogenic mechanical properties of the TMT MEA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Jong Woo Won, Seulbi Lee, Hye-Jeong Choe, Yong-Taek Hyun, Dong Won Lee, Jeong Hun Lee
Summary: Cold-rolled pure titanium showed improved sheet formability after undergoing cryogenic-deformation treatment. This treatment increased the thinning capability of the titanium and suppressed cracking during sheet forming. The formation of twins during deformation contributed to high thinning capability and increased strength through grain refinement and dislocation accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Handong Li, Lin Su, Lijuan Wang, Yanbin Jiang, Jiahui Long, Gaoyong Lin, Zhu Xiao, Yanlin Jia, Zhou Li
Summary: Homogenization heat treatment is a key procedure in controlling the second phase, enhancing composition uniformity, and workability of as-cast Cu-15Ni-8Sn alloy. This study found that electropulsing treatment (EPT) can significantly reduce treatment temperature and time, improve elongation and overall mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yuxuan Wang, Juntao Zou, Lixing Sun, Yunfei Bai, Zhe Zhang, Junsheng Cheng, Lin Shi, Dazhuo Song, Yihui Jiang, Zhiwei Zhang
Summary: A novel mechanical-heat-electricity synergistic method was proposed to enhance the mechanical properties of Cu-15Sn-0.3Ti alloy by forming annealing twins (ATs). The combination method of Rotary swaging (RS) and Electric pulse treatment (EPT) successfully induced recrystallization and refinement of the microstructure, leading to a significant increase in the strength of the alloy within a short time.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Zhiyi Ding, Jiangtao Xie, Tong Wang, Aiying Chen, Bin Gan, Jinchao Song
Summary: This study demonstrated the Ta-induced strengthening of CoCrNi-AlTi MEAs using nanoscale heterogeneous coherent precipitates. The addition of Ta and aging treatments significantly enhanced the mechanical properties of the alloy, including yield strength, ultimate tensile strength, and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Feng Qin, Feihu Chen, Junhua Hou, Wenjun Lu, Shaohua Chen, Jianjun Li
Summary: Plastic instability in strong multilayered composites is completely suppressed by architecting nanoscale BCC Nb crystalline-amorphous CuNb interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)