Article ID Journal Published Year Pages File Type
1635997 Transactions of Nonferrous Metals Society of China 2015 9 Pages PDF
Abstract
Experiments and visco-plastic self-consistent (VPSC) simulations were used to quantify the amount of twinning and the relationship to stress-strain behavior in a textured Mg-3Al-1Zn plate. Two different compression directions were utilized to favor {1 0 1¯ 2} extension or {1 0 1¯ 1} compression twinning. {1 0 1¯ 2} twins nucleate at the beginning of plastic deformation and grow to consume the parent grains completely. During compression along the normal direction, {1 0 1¯ 1} twinning and {1 0 1¯ 1}-{1 0 1¯ 2} double twinning start at strain of 0.05, and the number of twins increases until rupture, above strain of 0.15. {1 0 1¯ 1} and {1 0 1¯ 1}-{1 0 1¯ 2} twinning also occur during compression along the transverse direction, start at strain of 0.06 and then multiply in grains totally reoriented by {1 0 1¯ 2} twins. Using suitable parameters, the VPSC model can accurately predict the occurrence of extension, compression and double-twinning as well as the flow stresses and deformed textures. According to VPSC simulations, twinning and slip have the same latent hardening parameters.
Related Topics
Physical Sciences and Engineering Materials Science Metals and Alloys
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