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 University, Chongqing 400715, China

• 2 School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, China

• 3 College of Materials Science and Engineering, Chongqing University of Technology, Chongqing 400054, China

• 4 College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China

Abstract

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 ˜86.3° 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.

https://www.sciencedirect.com/science/article/pii/S1005030219301914