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arXiv · 1511.08620

Effect of interstitial-driven lattice expansion on the stacking fault energy in austenitic steels

Song Lu·Wei Li·Se Kyun Kwon·Kalevi Kokko·Qing-Miao Hu·Staffan Hertzman·Levente Vitos
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Abstract

Interstitials (carbon and nitrogen) are crucial alloying elements for optimizing the mechanical performance of the twinning-induced plasticity (TWIP) steels in terms of the stacking fault energy (SFE). First-principles calculations have been performed to study the effect of interstitial-induced lattice expansion on the SFE. Comparing the predictions with the SFEs measured for alloys containing C and N, our results suggest that the dominant effect of these interstitials on the SFE is due to the lattice expansion effect.

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Song Lu, Wei Li, Se Kyun Kwon, Kalevi Kokko, Qing-Miao Hu, Staffan Hertzman, Levente Vitos. 2015-11-27. Effect of interstitial-driven lattice expansion on the stacking fault energy in austenitic steels. https://arxiv.org/abs/1511.08620

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