Texture control by {10-12} twinning to improve the formability of Mg alloys: A review

Bo Song¹，Qingshan Yang²，Tao Zhou³，Linjiang Chai³，Ning Guo¹，Tingting Liu¹，Shengfeng Guo¹，Renlong Xin⁴

1. School of Materials and Energy, Southwest University2. School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology3. College of Materials Science and Engineering, Chongqing University of Technology4. College of Materials Science and Engineering, Chongqing University

摘 要：Texture control of wrought Mg alloys, particularly in rolled Mg alloy sheets, has been an important research topic for the past several decades because it has significant influence on stretch formability at room temperature. For Mg alloys, {10-12} twinning can be easily activated and causes a ■ lattice rotation. Thus, pre-twinning deformation is considered as an effective and low-cost method for texture control in wrought Mg and its alloys. Furthermore, it has been verified that texture control via pre-twinning deformation can remarkably improve stretch formability of rolled Mg alloy sheets. In this review, recent researches on texture control via twinning deformation and its influence on stretch formability will be critically reviewed. The main contents include the micro-mechanism and impact factors of control in twin-orientation, plastic processing techniques of pre-inducing twins and the application of pre-induced twins in improvement of stretch formability. Finally, further research directions on this field were proposed.

关键词：