Article
Materials Science, Multidisciplinary
Zhiquan Huang, Chuanlu Qi, Yanchun Zhu, Guowei Yang, Hongyu Lai, Jinchao Zou
Summary: The microtexture evolution of AZ31 magnesium alloy plate edge samples was studied using EBSD, revealing that the generation of extension twins is influenced by varying deformation conditions. At room temperature, the edge samples exhibited significantly greater texture strength than the middle part, with the consumption of hard-oriented grains and weakening effect of the basal texture being proportional to the volume fraction of extension twins.
METALS AND MATERIALS INTERNATIONAL
(2021)
Review
Materials Science, Multidisciplinary
Mahesh Panchal, K. R. Ravi, Lalit Kaushik, Rajesh Khatirkar, Shi-Hoon Choi, Jaiveer Singh
Summary: Magnesium alloys have gained great interest as the lightest structural metallic materials with high specific strength and stiffness. However, their poor formability at room temperature is a limitation for their structural applications. Various techniques, including microalloying, severe plastic deformation, thermomechanical processing, and pre-twinning/stretching, have been proposed to alter the crystallographic texture in magnesium alloys.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Chaitanya Paramatmuni, Anil Bandi, Anand K. Kanjarla
Summary: The ductility of Magnesium alloys is often limited by the strong basal texture. Previous attempts to reduce the intensity of basal textures involved adding rare earth (RE) elements. However, due to cost and scarcity, alloys with calcium and tin have recently been introduced. Among them, Mg-2Sn-2Ca alloys have shown high strength in extruded condition. This study reports the mechanical properties of the alloy in sheet form for the first time, examining in-plane mechanical anisotropy, texture, microstructure, and deformation twins.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Lichao Li, Chunjoong Kim, Young-Min Kim
Summary: Four types of slip systems and two types of twinning were identified in magnesium alloys using SEM and EBSD. The Schmid factors of these slip systems were calculated based on the Euler angle obtained from EBSD. The identification of slip systems and calculation of Schmid factors are crucial for understanding the deformation mechanism of the material.
Article
Materials Science, Multidisciplinary
Tianxu Zheng, Yaobo Hu, Chao Zhang, Tianshuo Zhao, Fusheng Pan, Aitao Tang
Summary: The high ductility of the Mg-2Gd-0.4Zr alloy at room temperature is attributed to the rare earth texture, higher proportion of non-basal slip, high grain boundary strength, and synergy between twinning and dislocation. Local strain compatibility may also contribute to its high ductility.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Physical
Umer Masood Chaudry, Gukin Han, Yeonju Noh, Tea-Sung Jun
Summary: The effect of variable Ca content and deformation temperature on the microstructure, texture, and slip behavior of pure Mg was investigated. Uniaxial compression tests were performed at room and cryogenic temperatures. The results showed that Mg-Ca alloys exhibited a smaller grain size compared to pure Mg. The weak textured Mg-Ca alloys demonstrated a remarkable strength/ductility synergy. Additionally, the slip behavior analysis revealed different slip activities in Mg and Mg-Ca alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Krishna Yaddanapudi, Brandon Leu, M. Arul Kumar, Xin Wang, Julie M. Schoenung, Enrique J. Lavernia, Timothy J. Rupert, Irene J. Beyerlein, Subhash Mahajan
Summary: This study investigated {(1) over bar 012} tensile twins terminating inside the grains of a deformed Mg-Y alloy using transmission electron microscopy. Crystallographic features of the terminating twins and associated slip structures were quantified and analyzed, with local stresses computed using crystal plasticity simulations. Basal < a > and < c + a > matrix glide were found to accommodate the plastic stresses near the terminating twins, with defect contrast consistent with lattice dislocations and twinning partials observed along the twin boundary. A dislocation reaction was proposed to establish the interrelationship between matrix glide and {(1) over bar 012} twinning in Mg-Y alloys.
Article
Engineering, Mechanical
Jing Xu, Bo Guan, Yunchang Xin, Xiao Li, Peidong Wu, Xiaoxu Huang, Qing Liu
Summary: This study systematically investigated the mechanism by which Li additions induce a more homogeneous deformation in Mg. The results showed that the addition of Li dramatically reduced the critical resolved shear stress of pyramidal (c+a) slip, facilitating easy and uniform deformation propagation and improving deformation homogeneity.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Materials Science, Multidisciplinary
Wei Li, Songsong Li, Hui Yu
Summary: The plastic behavior and deformation mechanism of textured pure titanium were studied using uniaxial tensile tests, crystal orientation observation, and Schmid law analysis. The results show that there is an obvious strain rate effect and anisotropy in the yield and hardening behaviors of the material. The study also reveals that different tensile directions have different yield mechanisms, and both twinning polarity and Schmid law have an effect on twinning activation.
MATERIALS CHARACTERIZATION
(2022)
Article
Metallurgy & Metallurgical Engineering
Yan-qin Chai, Dong-di Yin, Shen Hua, Guang-hao Huang, Hao Zhou, Jiang Zheng, Qu-dong Wang
Summary: This study statistically investigated the influence of Y content on the grain-scale twinning behavior in Mg-Y alloys. It was found that the anomalous twinning behavior was more pronounced under tension, and this trend was enhanced with increasing Y content. However, the opposite trend was observed under compression. Furthermore, the fractions of anomalous twinning were found to be correlated with the maximum Schmid factors of basal slip and prismatic slip in the corresponding parent grains.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Nanoscience & Nanotechnology
Jing Xu, Yanshuo Peng, Bo Guan, Yunchang Xin, Adrien Chapuis, Guangjie Huang, Qing Liu
Summary: Dual-phase Mg-Li alloys with different rolling paths were studied to investigate the effect of rolling path on microstructure, texture and mechanical anisotropy. The lamellar alpha+beta structures remained after ED-rolling and subsequent annealing, while disappeared after TD-rolling. The texture of beta phase was hardly affected by the rolling path. Annealing only reduced the maximum intensity of texture without changing the type of texture. VPSC simulations revealed that the activated deformation modes and alpha/beta phase boundaries played important roles in texture evolution. There was an obvious mechanical anisotropy after ED-rolling, which disappeared after TD-rolling.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
B. Q. Shi, Y. Z. Wang, X. L. Shang, L. Y. Zhao, C. Q. Li, D. C. Chen, B. H. Nie, R. S. Chen, W. Ke
Summary: This study investigates the microstructure evolution and texture development of a RE-containing Mg alloy during hot rolling, aiming to understand the formation of shear bands and their correlation with macro-texture characteristics. The results reveal the roles of different types of twins/variants and dislocation mechanisms in shear band formation, and provide insights into the influence of these factors on the texture development.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Shengzhan Wang, Xiaopei Li, Song-Zhu Kure-Chu, Biwei Deng, Xiaohui Li, Xiufeng Xiao
Summary: Mg-rare earth (RE) alloy, Mg-1Gd (G1), was deformed by electroplastic-asymmetric rolling (EASR) and symmetric electroplastic rolling (ER). Microstructure and texture evolutions of the rolled alloys were characterized using EBSD, XRD, and TEM observations. Tensile tests were conducted to evaluate the mechanical properties of the rolled samples. The results showed that EASR processed sample exhibited superior rollability and tensile properties compared to the ER processed sample, which can be attributed to the abnormal activity of {1012} twinning and concomitant texture evolution during EASR. The study demonstrated the feasibility of activating {1012} twinning of Mg alloys directly through the rolling process, offering a novel approach to address the poor rollability of Mg alloys.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Xiaoxu Wu, Pingli Mao, Xuanyu Liu, E. Yuqing, Le Zhou, Zhi Wang, Feng Wang, Zheng Liu
Summary: The effects of volume fraction of pre-introduced {10-12} extension twins on the adiabatic shear sensitivity of AM30 magnesium alloys were studied. The results showed that the adiabatic shear sensitivity of the alloys increased with the increase in the volume fraction of twins, while the degree of recrystallization in the shear band decreased.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Yu-qin Zhang, Wei-li Cheng, Hui Yu, Hong-xia Wang, Xiao-feng Niu, Li-fei Wang, Hang Li
Summary: This study systematically investigated the twinning behavior, dynamic recrystallization (DRX) mechanism, and texture evolution of extruded Mg-xBi (x=0.5 wt.%, 2.0 wt.%) alloys during hot compression. The results show that the texture types and intensities are closely related to twinning behavior and DRX mechanism. The formation and variation of {10 (1) over bar2} extension twins dominate the early evolution of texture, while the DRX mechanism plays a greater role as the strain increases.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
