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Characteristics of different {10-12} twin variants in magnesium alloy during room temperature dynamic plastic deformation

Published online by Cambridge University Press:  17 June 2013

Chao Lou ,
Xiyan Zhang ,
Gaolin Duan ,
Jian Tu  and
Qing Liu
Chao Lou
Affiliation:
School of Materials Science and Engineering, Chongqing University, Chongqing 400030, China
Xiyan Zhang*
Affiliation:
School of Materials Science and Engineering, Chongqing University, Chongqing 400030, China
Gaolin Duan
Affiliation:
School of Materials Science and Engineering, Chongqing University, Chongqing 400030, China
Jian Tu
Affiliation:
School of Materials Science and Engineering, Chongqing University, Chongqing 400030, China
Qing Liu
Affiliation:
School of Materials Science and Engineering, Chongqing University, Chongqing 400030, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Recently, the {10-12} twin variants activated during dynamic plastic deformation (DPD) of Mg alloy have been investigated by analyzing their Schmid factors (SFs), and their contributions to deformation have been calculated. During DPD of Mg–3%Al–1%Zn alloy, different {10-12} variants are generated relative to their SFs when initial grains have defined orientations with one a-axis of the crystal lattice at roughly 0 or 30° from the compression direction. The volume fraction of twins deeply influences the strain accommodated by twinning. The {10-12} variant pair with the maximum SF accommodated about 90% of the twinning strain. Its high volume fraction indicated that both nucleation and growth mechanisms played important roles in the strain accommodation. Other {10-12} variants had a lower volume fraction and accommodated twinning strain mainly by twin nucleation and made a lesser contribution to the total deformation.

Keywords

Mg alloy{10-12} twin variantSchmid factorstrain accommodation
Type
Articles
Information
Journal of Materials Research , Volume 28 , Issue 14 , 28 July 2013 , pp. 1885 - 1890
Copyright
Copyright © Materials Research Society 2013 

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References

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