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Enhanced phase transformation and variant selection by electric current pulses in a Cu–Zn alloy

Published online by Cambridge University Press:  15 April 2014

Xinli Wang ,
Wenbin Dai ,
Rui Wang ,
Xinzhong Tian  and
Xiang Zhao
Xinli Wang*
Affiliation:
Research Institute, Northeastern University, Shenyang 110004, People's Republic of China
Wenbin Dai
Affiliation:
School of Materials and Metallurgy, Northeastern University, Shenyang 110004, People's Republic of China
Rui Wang*
Affiliation:
Steel Works, Xingtai Iron and Steel Corp., Ltd., Xingtai 054027, People's Republic of China
Xinzhong Tian
Affiliation:
Xingtai Iron and Steel Corp., Ltd, Xingtai 054027, People's Republic of China
Xiang Zhao*
Affiliation:
School of Materials and Metallurgy, Northeastern University, Shenyang 110004, People's Republic of China
*
a)Address all correspondence to this author. e-mail: wangxl520@hotmail.com
b)e-mail: zhaox@mail.neu.edu.cn
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Abstract

The variant selection from the parent α phase to the product β phase during the enhanced phase transformation induced by the electric current pulses (ECPs) was investigated in a Cu–Zn alloy. The electron backscatter diffraction results showed that the crystallographic variant selection was not only across those prior α/α grain boundaries, but also within the α grain interior, and it implied that the nucleation of the β phase on the up-transformation obeyed a preferred orientation selection. Further analysis revealed that the orientation relationship between the α phase and the β phase variants nucleated from the α phase was close to 44.3° about <114>, which clearly described the rotation axes and the misorientation angles in terms of an axis/angle description when the high temperature phase nucleated from the matrix. Therefore, the ECP treatment would provide a new promising and convenient method to investigate the variant evolution on the up-transformation.

Keywords

electric current pulsesnucleation and growth processvariant selection
Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 8 , 28 April 2014 , pp. 975 - 980
Copyright
Copyright © Materials Research Society 2014 

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References

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