Effect of Electric Field on Aging Phase Transformation in Al-Zn-Mg-Cu Alloys

DOI

10.2991/ame-16.2016.58How to use a DOI?

Keywords

Aging phase transformation, Electric field, First-principles, Al-Zn-Mg-Cu alloys

Abstract

The effect of electric fields on the aging phase transformation of Al-Zn-Mg-Cu alloys is investigated with the first-principles method combined with vacancy mechanism. The effects of external electric field with different direction on aging phase transformation and electron structure are analyzed. Results show that the Gibbs free energy of the ' phase exhibits different responses to the different external electric directions. The orientation precipitation of the ' phase can be activated during aging with an external electric field lower than 26MV/cm. The calculation of density of states provides an explanation for the different responses of the GP zones, ' and phases to the external electric field. And a vacancy mechanism is proposed to explain the microstructural evolution during aging in an electric field.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Chun-Mei Li
AU  - Zhong-Jing Xie
AU  - Zhi-Qian Chen
AU  - Xiao Li
AU  - Hong He
AU  - Nan-Pu Cheng
PY  - 2016/06
DA  - 2016/06
TI  - Effect of Electric Field on Aging Phase Transformation in Al-Zn-Mg-Cu Alloys
BT  - Proceedings of the 2nd Annual International Conference on Advanced Material Engineering (AME 2016)
PB  - Atlantis Press
SP  - 344
EP  - 355
SN  - 2352-5401
UR  - https://doi.org/10.2991/ame-16.2016.58
DO  - 10.2991/ame-16.2016.58
ID  - Li2016/06
ER  -