基于热力学理论的Fe-Mn-Al-C系低密度钢层错能计算模型

doi:10.11896/j.issn.1005-023X.2018.16.029

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Abstract The present work aimed to find an appropriate calculation model for the stacking fault energy (SFE) of Fe-Mn-Al-C low-density steels so as to facilitate the relevant research upon the SFE of this representative species of high-strength steel. We discussed and depicted the SFE calculation model established based on the pertinent thermodynamics theory and the experimental met-hods for determining SFE. Based on the Olson-Cohen thermodynamics model, we then calculated the SFE of some Fe-Mn-Al-C steels which had been determined in previous works to evaluate the reliability of Olson-Cohen model, and subsequently carried out the inverse correction for main parameters in the model. The computer-assisted theoretical calculation results of the SFE for the series of Fe-(10-30)Mn-(0-12)Al-(0-1.2)C (wt%) low-density steels showed that more Mn, Al or C elements will all lead to larger SFE. SFE’s sensitivity toward Al is the highest and the influence of various elements are γ_SFE,Al>γ_SFE,Mn>γ_SFE,C. In addition, under high temperature range (300-1 000 K) the SFE increases at a higher rate compared with low temperature range (0-300 K).

Key words： low-density steel stacking fault energy (SFE) Olson-Cohen model composition temperature

Published: 18 September 2018

CLC number:

TG335.3

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	Articles by authors
	ZHANG Xiaofeng
	YANG Hao
	LI Jiaxing
	KAN Zhongwei
	SHI Qi
	HUANG Zhenyi

Cite this article:

ZHANG Xiaofeng,YANG Hao,LI Jiaxing, et al. The Stacking Fault Energy (SFE) Calculation Model for Fe-Mn-Al-C Low-density Steels Based on Thermodynamics Theory[J]. Materials Reports, 2018, 32(16): 2859-2864.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.16.029 OR http://www.mater-rep.com/EN/Y2018/V32/I16/2859

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