Article
Nanoscience & Nanotechnology
S. Sanyal, M. Paliwal, T. K. Bandyopadhyay, S. Mandal
Summary: The present investigation studied the microstructure, phase evolution, and mechanical properties of lean as-cast Mg-Al-Ca-Mn alloys with different Ca/Al ratios through experiments and thermodynamic calculations. The results showed that the area fraction of eutectic second phases increases with Ca/Al ratio, while lattice parameters and elastic modulus of the matrix phase decrease. Alloys with the minimum Ca/Al ratio exhibited the highest strength due to solid solution strengthening and precipitation strengthening.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Nikolaus P. Papenberg, Aurel Arnoldt, Bernhard Trink, Peter J. Uggowitzer, Stefan Pogatscher
Summary: This study investigates the forging process of a heat-treatable magnesium alloy AXMZ1000 for a piston rod. The microstructural evolution and mechanical properties of two different stock materials, cast and extruded, are compared and analyzed. The results show that comparable microstructures are obtained with both starting materials, and the mechanical properties achieved with extruded feedstock are slightly better.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Yuliang Zhao, Dongfu Song, Haoliang Wang, Yiwang Jia, Bo Lin, Yue Tang, Ying Tang, Da Shu, Zhenzhong Sun, Yanan Fu, Weiwen Zhang
Summary: Recycled Al-Mg-Mn-Fe alloys with different Fe levels were successfully prepared by squeeze casting. The relationship between microstructural evolution and mechanical properties was studied using various techniques. The results showed that Fe additions increased the yield strength and ultimate tensile strength of the alloys. The morphological evolution of the alloys from individual Chinese-script to interconnected plate-like shape was observed. In-situ radiography revealed the facet growth behavior of Al6(FeMn) phases during solidification. The applied pressure was found to refine the grains and reduce the volume fraction of pores, contributing to the improvement of strength and elongation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
R. E. Schaublin, M. Becker, M. Cihova, S. S. A. Gerstl, D. Deiana, C. Hebert, S. Pogatscher, P. J. Uggowitzer, J. F. Loffler
Summary: The impact of Zn and Ca on the microstructure of lean Mg-Zn-Ca alloys was investigated. The precipitation of binary and ternary precipitates was observed at different temperatures. Hardness testing revealed that GP zones were the most effective factor in hardening.
Article
Materials Science, Multidisciplinary
Bing-Yu Wang, Mei-Xuan Li, Yi-Jia Li, Yu-Fei Wang, Yipeng Gao, Hui-Yuan Wang
Summary: Lean Mg-1.2Zn-0.3Ca-0.3Al-xMn (x = 0.25, 0.38, 0.5 wt%) alloys with different Al/Mn ratios were prepared using twin-roll casting technique. The formation of rhombohedral Al8Mn5 or cubic beta-Mn depended on the Al/Mn ratio. The alloy with Al/Mn>1.6 exhibited the lowest average corrosion rate (4.55 mm y-1) due to the lower Volta potential of Al8Mn5 compared to beta-Mn. The presence of fine Al8Mn5 weakened micro-galvanic corrosion and reduced stress concentration, resulting in admirable corrosion resistance and mechanical properties (UTS: -266 MPa, YS: -193 MPa, EF: -20%) for the alloy with Al/Mn>1.6.
Article
Materials Science, Multidisciplinary
Rensong Huang, Mengnie Li, Hongfu Yang, Shumeng Lu, Hanning Zuo, Shanju Zheng, Yonghua Duan, Xiaohong Yuan
Summary: Increasing Mg content in the as-cast Al-Zn-Mg-Cu alloys leads to higher amounts of nonequilibrium eutectic structures and tertiary dendrites in the a(Al) matrix. Additionally, the crystallization temperature range decreases with increasing Mg content.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
D. Andre, M. Freund, U. Rehman, W. Delis, M. Felten, J. Nowak, C. Tian, M. Zubair, L. Tanure, L. Abdellaoui, H. Springer, J. P. Best, D. Zander, G. Dehm, S. Sandlobes-Haut, S. Korte-Kerzel
Summary: This publication presents and applies methods for structural, mechanical, electrochemical, and defect analysis of the Mg-Al-Ca system, with a focus on the required metallographic preparation methods. These methods support research on the alloy system.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Physical
Aimin Chu, Yuping Zhao, Rafi Ud-din, Hairong Hu, Qian Zhi, Zerui Wang
Summary: Mg-Al-Ca-Mn alloys with Ca/Al >= 1 were prepared using specific processes to create composites with favorable properties. The presence of the second phase Al2Ca in the alloys was found to be beneficial for enhancing the performance of the alloys.
Article
Chemistry, Physical
Stefan Gneiger, Nikolaus P. Papenberg, Aurel R. Arnoldt, Carina M. Schloegl, Martin Fehlbier
Summary: Magnesium alloys are of particular interest in transportation due to their low mass and high specific stiffness. While widely accepted in high-volume applications such as gearbox housings and steering wheels, they currently find little to no industrial use in forming processes like extrusion and forging. Research on high-strength Mg alloys is ongoing worldwide, mostly relying on high levels of rare earths, raising questions about their ecological and economic sustainability.
Article
Materials Science, Multidisciplinary
Qingyu Hou, Xiaofeng Xu, Yang Zhao, Xudong Yan, Yachong Zhou, Jinguo Wang, Lai Wei, Yongqiang Yu
Summary: This study investigates the effects of electropulsing treatment (EPT) and conventional heat treatment on the microstructure and mechanical properties of extruded Mg-1.18Al-0.3Ca-0.46Mn alloy. The results show that EPT can replace solid solution treatment, refine grains, and reduce peak aging time. The accelerated aging process may be attributed to the increased vacancies and dislocations induced by EPT.
Article
Chemistry, Physical
Xinsheng Huang, Mingzhe Bian, Isao Nakatsugawa, Yasumasa Chino, Masahiko Sato, Kazumasa Yamazaki, Futoshi Kido, Hironori Ueda, Masashi Inoue
Summary: The study found that increasing the manganese content can significantly enhance the yield strength of Mg-3Zn-0.5Ca-0.5Al-xMn alloy, but further increasing to 1.5 wt% manganese content does not contribute to further strengthening. However, the alloy with 1 wt% manganese added achieved high strength, high formability, and improved thermal conductivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Yichang Wang, Lingfei Cao, Xiaodong Wu, Xiaomin Lin, Tianyu Yao, Liming Peng
Summary: In this study, the effects of minor Ti, Mn, Cr, Zr, and Er additions on cast Al-Zn-Mg-Cu alloys were investigated. The addition of Ti significantly refines the ingot grains, while Mn and Cr additions reduce impurities and form specific phases. The joint addition of Ti, Mn, Cr, Zr, and Er creates a bulk composite phase. The alloy with the joint addition of these elements exhibits the highest hardness due to collaborative strengthening effects.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Zahra Nasiri, Mahmoud Sarkari Khorrami, Hamed Mirzadeh, Massoud Emamy
Summary: Friction stir processing leads to significant grain refinement and enhancement of mechanical properties in magnesium alloys. Calcium-containing alloys show more intense grain refinement due to the presence of thermally-stable Al-Ca intermetallics. The AX43 alloy with a grain size of 1.7µm exhibits the best tensile properties.
Article
Metallurgy & Metallurgical Engineering
Shu-heng He, Ce Wang, Chao Sun, Yue Zhang, Kai Yan, Jing-hua Jiang, Jing Bai, Feng Xue, Huan Liu
Summary: This study investigates the effect of separate Al2Ca and Mg2Ca phases on the corrosion properties of Mg-Al-Ca-Mn alloys. The results show that ECAP alloys corrode slower compared to as-cast alloys, thanks to the dispersion and refinement of the second phase. Additionally, the corrosion degree is lower in the presence of the Al2Ca phase compared to the Mg2Ca phase, indicating that Al2Ca phase enhances the corrosion resistance of Mg-Al-Ca-Mn-based alloys more effectively.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Metallurgy & Metallurgical Engineering
Bao-Chang Liu, Shuai Zhang, Hong-Wei Xiong, Wen-Hao Dai, Yin-Long Ma
Summary: The effects of different Al contents on the microstructure, extrusion texture, and corrosion behavior of dilute Mg-Al-Ca-Mn alloy were studied. The corrosion rate of the alloy was found to be more sensitive to Fe impurities. The lowest corrosion rate was observed in the alloy with 1.2 wt% Al, which was mainly attributed to the weakening of the cathode effect caused by the increase of Al and the decrease of Fe in the precipitated phase. Refined grains, stronger basal surface texture, and higher corrosion potential from the higher Al content of the matrix further enhanced the corrosion resistance of the alloy.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2023)
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)