Investigation of the Deformation Behavior of Titanium-Particle-Reinforced Magnesium Matrix Composites Through in Situ Synchrotron Radiation Diffraction

作     者：Wu, Yi Zhou, Bijin Liu, Jiayuan Zhu, Tianci Wang, Jinhui Zhu, Gaoming Wang, Jie 

作者机构：School of Mechanical Engineering Suzhou University of Science and Technology Suzhou215009 China School of Mechanical Engineering Qinghai University Xining810016 China Institute of Material and Process Design Helmholtz-Zentrum Hereon Geesthacht21502 Germany National Engineering Research Center of Light Alloy Net Forming Shanghai Jiao Tong University Shanghai200240 China Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and Forming China 

出 版 物：《SSRN》 

年 卷 期：2024年

核心收录：

主　　题：Tensile strength 

摘      要：Despite the exceptional mechanical properties of metal matrix composites (MMCs) with metallic reinforcements, the specifics of their deformation behavior remain inadequately understood. This study aims to provide new insights into the twin and dislocation activities in a Tip/Mg–5Al composite during tensile deformation through lattice strain analysis from in situ synchrotron radiation diffraction. The composite exhibited a tensile elongation of 16%, a macro-yield strength of 115 MPa, and an ultimate tensile strength of 252 MPa. It is found that the activities of the geometrically necessary dislocations (GNDs) and the {10[[EQUATION]]2} tension twins within the α-Mg matrix contribute to distinct forms of micro-yielding of the composite. Additionally, the nucleation of {10[[EQUATION]]2} extension twins occurring within Ti particles plays a crucial role in facilitating deformation compatibility between the α-Mg matrix and its reinforcements. The estimated critical resolved shear stress (CRSS) for basal and prismatic slip systems of the α-Mg matrix is approximately 2.2. This study further discussed the significant influence of load transfer effects on activating non-basal dislocations. © 2024, The Authors. All rights reserved.