Simulation of precipitate splitting in an alloy (Ⅱ): Elastic energy collapse

Liu Lei; Chen Zheng; Wang Yong-Xin

doi:10.7498/aps.64.016401

Abstract

The phenomenon of elastic energy collapse (EEC) accompanying the variation of the structure and temperature during the growth of a nucleus is discovered while we study the precipitate splitting in an alloy. There are two ways to introduce the EEC, one is the instantaneous elastic energy collapse (IEEC) and the other is the gradual elastic energy collapse (GEEC). Simulation shows that whether the precipitate is splitted is related to the time when EEC emerges, and that the kind of splitting of the precipitate depends on the rate of EEC. For IEEC, if it is introduced when the diameter of a nucleus reaches about 80l–90l (l=12.18 nm) the precipitate is splitted to 4 blocks. For GEEC, if it is intoduced when the time is larger than τ = 7.5× 103 s, the precipitate is splitted to 2 blocks.

Keywords:

Authors and contacts

1.
State Key Laboratory of Solidification Processing, Northwesten Polytechnical University, Xi'an 710072, China;
2.
School of Materal Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China
Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 51174168, 51274167).

References

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[9]	Prikhodko S A, Ardell A J 2003 Acta Mater. 51 5021
[10]	Song W B, Wang J Q, Li Z Y 2014 Chin. Phys. B 23 066501
[11]	Qin X B, Li D X, Li R Q, Zhang P 2014 Chin. Phys. B 23 066501

Cited By

[1]	Khachaturyan A G 1986 Theory of structural transformations in solids (New Youk: Willey)
[2]	Khachaturyan A G, Semenovskaya S, Tsakalakos T 1995 Phys. Rev. B 52 22
[3]	Wang Y, Khachaturyan A G 1995 Acta Metal. Mater. 43 1837
[4]	1998 Acta Mater. 47 247
[5]	Calderon H A, Kostorz G, Qu Y Y 1997 Mater. Sci. and Eng. A 238 13
[6]	Yoo Y S, Yoon D Y, Henry M F 1995 Mater. and Mater. 1 47
[7]	Liu L, Chen Z, Wang Y X 2012 Acta Phys. Sin. 61 186401 (in Chinese) [刘磊, 陈铮, 王永欣 2012 61 186401]
[8]	He L P, Liu Y X 2009 J. Comput. Phys. 228 101
[9]	Prikhodko S A, Ardell A J 2003 Acta Mater. 51 5021
[10]	Song W B, Wang J Q, Li Z Y 2014 Chin. Phys. B 23 066501
[11]	Qin X B, Li D X, Li R Q, Zhang P 2014 Chin. Phys. B 23 066501

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Vol. 64, Issue 1 - 2015-01-05

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