Effect of Rolling Route on Microstructure and Tensile Properties of Twin-Roll Casting AZ31 Mg Alloy Sheets

• Published in: Materials Vol. 9; no. 6; p. 433
• Main Authors: Luo, Dan, Pan, Yue, Wang, Hui-Yuan, Zhao, Li-Guo, Liu, Guo-Jun, Liu, Yan, Jiang, Qi-Chuan
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 01.06.2016; MDPI
• Subjects: Alloys; Elongation; Grain size; Grains; Hot rolling; magnesium alloy; Magnesium base alloys; mechanical properties; Microstructure; rolling route; Surface layer; Tensile properties; Texture; Twin roll casting; United States > US; China; Germany; magnesium alloy; texture; mechanical properties; rolling route
• ISSN: 1996-1944; 1996-1944
• DOI: 10.3390/ma9060433

Twin-roll casting AZ31 Mg alloy sheets have been fabricated by normal unidirectional-rolling, head-to-tail rolling, and clock-rolling, respectively. It has been demonstrated that head-to-tail rolling is the most effective to refine the microstructure and weaken the basal texture among the three rolling routes. Excellent integrated tensile properties can be obtained by the head-to-tail rolling. The yield strength, ultimate tensile strength, and plastic elongation are 196 MPa, 301 MPa, and 28.9%, respectively. The strength can benefit from the fine grains (average value of 4.0 μm) of the AZ31 alloy processed by the head-to-tail rolling route, while the excellent plastic elongation is achieved owing to the weakened basal texture besides the fine grains. Results obtained here can be used as a basis for further study of some simple rolling methods, which is critical to the development of Mg alloys with high strength and plasticity.