Effect of Twin Boundary–Dislocation–Solute Interaction on Detwinning in a Mg–3Al–1Zn Alloy
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2016年第12期
论文作者：Jing Xu Bo Guan Huihui Yu Xuezhen Cao Yunchang Xin Qing Liu
文章页码：1239 - 1244
摘 要：In the present study,the influence of solute atoms together with dislocations at {1012} twin boundary(TB) on mechanical behavior of a detwinning predominant deformation in a Mg alloy AZ31 plate was systematically studied.The results show that a large number of {1012} twins disappear during recompression along the normal direction.Both the TB–dislocation interaction and TB–solute–dislocation interaction can greatly enhance the yield stress of the recompression along the normal direction(ND).However,the solute segregation at {1012} TBs with an intensive interaction with dislocations cannot further enhance the yield stress of ND recompression.The samples with TB–dislocation interaction show a similar working hardening performance with that subjected to a TB–solute–dislocation interaction.Both the TB–dislocation interaction and TB–solute–dislocation interaction greatly reduce the value of work hardening peaks during a detwinning predominant deformation.
Jing Xu，Bo Guan，Huihui Yu，Xuezhen Cao，Yunchang Xin，Qing Liu
School of Materials Science and Engineering,Chongqing University
摘 要：In the present study,the influence of solute atoms together with dislocations at {1012} twin boundary(TB) on mechanical behavior of a detwinning predominant deformation in a Mg alloy AZ31 plate was systematically studied.The results show that a large number of {1012} twins disappear during recompression along the normal direction.Both the TB–dislocation interaction and TB–solute–dislocation interaction can greatly enhance the yield stress of the recompression along the normal direction(ND).However,the solute segregation at {1012} TBs with an intensive interaction with dislocations cannot further enhance the yield stress of ND recompression.The samples with TB–dislocation interaction show a similar working hardening performance with that subjected to a TB–solute–dislocation interaction.Both the TB–dislocation interaction and TB–solute–dislocation interaction greatly reduce the value of work hardening peaks during a detwinning predominant deformation.
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