Article
Materials Science, Multidisciplinary
Zhenwei Gong, Jianfeng Wang, Yufeng Sun, Shijie Zhu, Liguo Wang, Shaokang Guan
Summary: The microstructure and compression mechanical properties of sub-rapidly solidified Mg-Zn-Y-Nd alloy cylinders with diameters of 2-8 mm prepared by step-copper mold casting were investigated. The study showed that the 2mm sample exhibited the highest ultimate fracture strength and largest plasticity, attributed to the activation of non-basal slips at the later stage of deformation, indicating that sub-rapid solidification technique could be a promising way to improve the mechanical properties of Mg alloys.
MATERIALS TODAY COMMUNICATIONS
(2021)
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
Nanoscience & Nanotechnology
Umer Masood Chaudry, Yeonju Noh, Gukin Han, Russlan Jaafreh, Tea-Sung Jun, Kotiba Hamad
Summary: This study investigates the effects of CaO additions on the microstructure, texture, and mechanical properties of AZ61 magnesium alloy. The addition of CaO leads to the formation of Ca-rich intermetallic compounds and influences the evolution of the alloy's structure. Additionally, the alloys containing CaO exhibit twined structures, with an increased fraction of tension twins as the amount of CaO increases.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Lei Wang, Dong -Rong Liu, Tian Chen, Shaofan Wang, Yang Cao
Summary: Adding low-cost aluminum element to Mg-RE alloy can significantly refine the grain structure in the laser surface remelting process and improve the thermal stability by forming nanoscale intermetallic compounds.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
P. X. Yan, J. Chang, W. L. Wang, X. N. Zhu, M. J. Lin, B. Wei
Summary: The liquid CoCrFeNiMo0.8 high entropy alloy (HEA) undergoes undercooling and solidifies rapidly. The transition from slow lamellar eutectic growth to rapid anomalous eutectic growth is observed, which affects crystal orientation and mechanical properties. The growth mechanism transition is due to independent nucleation and cooperative branched growth of the two eutectic phases. The structural refinement and increase in volume fraction of anomalous eutectic contribute to the improved hardness, compression strength, and ductility of the alloy.
Article
Chemistry, Physical
Jiri Kubasek, Jan Pinc, Klara Hosova, Marketa Strakova, Orsolya Molnarova, Jan Duchon, David Necas, Miroslav Cavojskyc, Michal Knapek, Matjaz Godec, Irena Paulin, Dalibor Vojtech, Jaroslav Capek
Summary: This paper investigates the effects of extrusion temperature and ratio on the microstructure and mechanical properties of Zn-0.8Mg-0.2Sr alloy. The results show that the grain size, material texture, and dislocation substructures have a significant influence on the alloy's elongation range and anisotropy. Under appropriate extrusion conditions, the alloy's mechanical properties can be greatly improved.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Malgorzata Trepczynska-Lent, Dariusz Boronski, Pawel Mackowiak
Summary: This study presents an analysis of the mechanical properties, microstructure, and fracture mechanisms of directionally solidified Fe-4.25%C eutectic alloy. Tests showed that directional solidification with controlled growth rate can improve the mechanical properties of the alloy, expanding its potential applications.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Wenna Jiao, Tianxin Li, Xiaoxue Chang, Yiping Lu, Guomao Yin, Zhiqiang Cao, Tingju Li
Summary: Eutectic high entropy alloys (EHEAs) are a promising option for engineering applications due to their superior mechanical properties and good castability. In this study, a new Co-free Al0.75CrFeNi EHEA was designed and prepared, exhibiting excellent mechanical properties with a high yield strength, fracture strength, and elongation to fracture. The alloy's deformation behavior was dominated by dislocation gliding in the BCC phase, and dislocation activation in the B2 phase contributed to further strain increase. The alloy achieved a good balance between strength and ductility through dislocation interactions and microstructural features.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Chuan Xu, Xinjian Yuan
Summary: High frequency ultrasonic vibration was used for arc welding of MB3 Mg alloy to improve welding defects and microstructure issues. By optimizing experimental parameters, Mg alloy joints with favorable mechanical properties were obtained. However, excessive ultrasonic power could degrade tensile strength.
Article
Nanoscience & Nanotechnology
Ling Qiao, Aorigele Bao, Zhonghong Lai, Yong Liu, Jingchuan Zhu, Yuan Wang
Summary: This study uncovers correlations between alloying elements and solidification interval characteristics through machine learning, successfully designing and testing the FeCrNiAl0.8 alloy with superior mechanical properties and high temperature competitiveness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Ling Qiao, Aorigele Bao, Zhonghong Lai, Yong Liu, Jingchuan Zhu, Yuan Wang
Summary: The correlations between alloying elements and solidification interval characteristics were revealed through machine learning; FeCrNiAl0.8 alloy was successfully designed, prepared, and tested with excellent mechanical properties; The experimental results demonstrated outstanding mechanical properties and specific strength of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
C. Y. Zhang, G. Yuan, Y. X. Zhang, C. Y. Liu, Y. Wang, F. Fang, G. D. Wang, Y. Y. Pang
Summary: This study utilized the twin-roll strip-casting technique to produce high-energy state Zr55Cu30Al10Ni5 (at%) amorphous alloy sheets, and investigated the impact of alloy melt temperatures on microstructure. The fabricated amorphous alloy sheets exhibited significant plasticity at room temperature through the formation and cross growth of multiple shear bands. The appropriate crystalline particles in the alloys could impede the linear propagation of shear bands and contribute to work-hardening, but also accelerated fracturing with increased deformation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Murtatha M. Jamel, Hugo Lopez, Benjamin Schultz, Wilkistar Otieno
Summary: The research investigated the influence of different cooling rates on the strength of pure Mg, finding that increasing the solidification rate can enhance hardness and ultimate tensile strength. In addition, improving grain structure can help to improve the mechanical properties of the material.
Article
Nanoscience & Nanotechnology
Min Zha, Shi-Chao Wang, Hai-Long Jia, Yi Yang, Pin-Kui Ma, Hui-Yuan Wang
Summary: By introducing Ca element, a microstructure consisting of fine recrystallized grains, low angle boundaries, and nano-sized CaMgSn particles has been achieved in a low-alloyed Mg-1.1Al-1.1Zn-0.2Sn-0.3Ca alloy. The addition of Ca inhibits recrystallization and grain growth during rolling and annealing. The annealed alloy exhibits high strength-ductility synergy, with a yield strength of -249 +/- 3 MPa, an ultimate strength of -308 +/- 4 MPa, and a total elongation of -14 +/- 1.1%.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
Juraj Lapin, Alena Klimova, Tatiana Pelachova, Oto Bajana
Summary: The microstructure evolution and mechanical properties of a multiphase complex concentrated alloy (CCA) prepared by directional solidification and quenching during solidification technique were investigated. The studied CCA exhibited a brittle-ductile transition behavior and anomalous strain hardening and softening behaviors at different temperatures.
