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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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Fe-Mn-C系M_s及马氏体相变驱动力的热力学计算
, PP. 42-49
Abstract:
经LFG(ΔG~(γ→a))-Mogutnov(ΔG_(Fe)~(γ→a))、徐祖耀(Shu-A)(ΔG~(γ→a))-Orr-Chipman(ΔG_(Fe)~(γ→a))、徐祖耀(Shu-B)(ΔG~(γ→a))-Orr-Chipman(ΔG_(Fe)~(γ→a))组合,均可算得Fe-Mn-C合金的Ms温度且与实验值十分符合.所得结果经数学处理,得Fe-Mn-C系Ms与成分的关系为Ms(K)=817.4-7513.4xc-4141.9x_(Mn)-32083.5x_Cx_(Mn)(LFG)Ms(K)=829.9-7580.5x_C-4166.0x_(Mn)-15727.8x_Cx_(Mn)(SHU-A)Ms(K)=829.2-7276.1x_C-2915.4x_(Mn)-43825.7x_Cx_(Mn)(SHU-B)其线性相关系数均大于0.992.C和Mn浓度均使合金的Ms线性地降低,而碳的作用几乎是Mn的两倍.处理中引入了合金元素交互作用项(x_Cx_(Mn)),表明C,Mn相互加剧对Ms的影响。随含C,Mn量的增加,相变驱动力均单调地增加,而不存在奇异点.Ms和相变驱动力的计算值均依赖于ΔG_(Fe)~(γ→a)项.
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