Compressive Deformation Behavior of AZ31Mg Alloy Containing {10–12} Extension Twins at Different Temperature

Hua Zhang; Xiaoqing Bai; Minjian Hou; Lifei Wang; Qiang Zhang; Jianfeng Fan; Weiguo Li; Hongbiao Dong; Bingshe Xu

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자료유형: 학술저널

저자정보: Hua Zhang (Taiyuan University of Technology) Xiaoqing Bai (Taiyuan University of Technology) Minjian Hou (Taiyuan University of Technology) Lifei Wang (Taiyuan University of Technology) Qiang Zhang (Taiyuan University of Technology) Jianfeng Fan (Taiyuan University of Technology) Weiguo Li (Taiyuan University of Technology) Hongbiao Dong (University of Leicester) Bingshe Xu (Taiyuan University of Technology)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.25 No.5

발행연도: 2019.1

수록면: 1,170 - 1,181 (12page)

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Influence of pre-introducing {10–12} extension twins on compressive deformation behavior of AZ31Mg alloy at differenttemperature was investigated. The compression tests were conducted along the normal direction of AZ31Mg alloy at roomtemperature, 100 °C, 200 °C and 300 °C with a strain rate of 1 × 10−3 s−1. The results indicated that the pre-introducing{10–12} extension twins strongly affected the yield strength, the peak strength and the strain hardening rate at middle-lowtemperature (≤ 200 °C). The twinned samples containing pre-introducing {10–12} extension twins exhibited smaller yieldstrength and larger peak strength than the as-received samples without {10–12} extension twins at temperature ≤ 200 °C. Forthe as-received samples, the strain hardening rate decreased gradually at different temperature. While for the twinned samples,the strain hardening behavior exhibited three distinct stages at temperature ≤ 200 °C. When compressing at 300 °C, the asreceivedand twinned samples exhibited similar compression flow curves and strain hardening rate curves. The continuousdynamic recrystallization (CDRX) was the main dynamic recrystallization (DRX) mechanism in the as-received sample whencompressing at 200 °C. The twin assisted DRX besides CDRX was also initiated in the twinned sample when compressingat 200 °C. While the DRX mechanism was transformed into the discontinuous dynamic recrystallization (DDRX) in boththe as-received and twinned samples when compressing at 300 °C.

#AZ31Mg alloy · {10–12} Extension twins · Compressive deformation behavior · Microstructure · DRX

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