Microstructure evolution and mechanical response of extruded AZ31B magnesium alloy sheet at large strains followed by annealing treatment

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 618; pp. 262 - 270
• Main Authors: Dong, Jingren, Zhang, Dingfei, Dong, Yufeng, Chai, Sensen, Pan, Fusheng
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 01-11-2014; Elsevier
• Subjects: Annealing; Applied sciences; Cold working, work hardening; annealing, quenching, tempering, recovery, and recrystallization; textures; Cross-disciplinary physics: materials science; rheology; Elasticity. Plasticity; Evolution; Exact sciences and technology; Extruded AZ31 sheet; Extrusion; Formability; Heat treatment; Magnesium base alloys; Materials science; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metals. Metallurgy; Microstructure; Other heat and thermomechanical treatments; Physics; Production techniques; Static recrystallization; Strain; Surface layer; Texture; Treatment of materials and its effects on microstructure and properties; Extruded AZ31 sheet; Annealing; Formability; Texture; Static recrystallization; High strain; Uniaxial tension stress; Mechanical properties; Tension test; Magnesium alloy; Recrystallization; Extrusion; Microstructure
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2014.09.057

Extruded AZ31B magnesium alloy sheets were stretched to large strains (7%, 13%, 15% and 17%) along the transverse direction, and then were annealed at 350°C for 60min. The uniaxial tensile tests and Erichsen tests on the as-received sheet and stretched samples in annealed condition (SA) were conducted. The results showed that the microstructure of extruded AZ31B magnesium alloy sheets was modified by static recrystallization (SRX). The basal texture intensity was significantly weakened and its spread became more dispersive. Compared with the as-received sheets, improved mechanical properties of SA sheets were achieved. The Erichsen value was significantly increased from 2.5 to 5.6 by about 124% due to the weakened texture.