Combined Effects of Mn, C, and H on the Stacking Fault Energy in Austenitic Mn Steels,Steel Research International

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Combined Effects of Mn, C, and H on the Stacking Fault Energy in Austenitic Mn Steels
Steel Research International ( IF 1.9 ) Pub Date : 2021-04-07 , DOI: 10.1002/srin.202000550
Wen-Long Jin ₁ , Jin-Li Cao _{1,

2} , Jin-Xu Li ₁

Affiliation

Manganese, carbon, and hydrogen are common alloying elements in austenitic Mn steels, which all influence the stacking fault energy (SFE), with Mn and H decreasing while C increasing it. The combined effects of Mn, C, and H on the SFE in austenitic Fe_1−xMn_x alloys, including pure Fe, Fe₃₁Mn, Fe₁₅Mn, Fe₇Mn, and Fe₃Mn, using first-principles calculations, are investigated. The enhancing effect of C on the SFE is 29 mJ m⁻² lower in Fe₃Mn than in pure Fe, whereas it remains largely unchanged for low Mn concentrations. The noticeable combined Mn−C effect for Fe₃Mn is mainly due to the formation of Mn−C−Mn trimer. Similarly, the boosting effect of H is weakened with increasing Mn content. As for the ternary Mn−C−H effect, it is found that it is generally stronger than that of binary effects. All the binary and ternary effects are much smaller than those of individual elements, indicating weak multiatom interactions of Mn, C, and H.

中文翻译：

Mn、C 和 H 对奥氏体锰钢层错能的综合影响

锰、碳和氢是奥氏体锰钢中常见的合金元素，它们都会影响堆垛层错能 (SFE)，Mn 和 H 减少而 C 增加。Mn、C 和 H 对奥氏体 Fe _{1− x} Mn _x合金（包括纯 Fe、Fe ₃₁ Mn、Fe ₁₅ Mn、Fe ₇ Mn 和 Fe ₃ Mn）中SFE 的综合影响，使用第一性原理计算，被调查。C 对 SFE 的增强作用在 Fe ₃ Mn 中比在纯 Fe 中低29 mJ m ^-2，而对于低 Mn 浓度，它基本保持不变。Fe ₃的显着组合 Mn-C 效应Mn主要是由于形成Mn-C-Mn三聚体。同样，H 的促进作用随着 Mn 含量的增加而减弱。至于三元Mn-C-H效应，发现一般比二元效应强。所有二元和三元效应都远小于单个元素的效应，表明 Mn、C 和 H 的多原子相互作用较弱。

更新日期：2021-04-07

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