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Thermodynamic prediction ofM s in Fe−Mn−Si shape memory alloys associated with fcc (γ) → hcp (ε) martensitic transformation

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Abstract

By means of X-ray diffraction profile analysis of three different composition Fe−Mn−Si alloys, the relationship between stacking fault probabilityP sf with the concentrations of constituents in alloys, 1/P sf =540.05+23.70× Mn wt%-138.74×Si wt%, was determined. According to the nucleation mechanism by stacking fault in this alloy, the equation between critical driving force †G c andP sf †G c=67.487+0.177 5/P sf (J/mol), was made. Therefore, the relationship between critical driving force and compositions was established. Associated with the thermodynamic calculation, theM s of fcc (γ)→ hcp(ε) martensitic transformation in any suitable composition Fe−Mn−Si shape memory alloys can be predicted and results seem reasonable as compared with some experimental data.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Shanghai Jiao Tong University, 200030, Shanghai, China

    Jihua Zhang, Xuejun Jin & Zuyao Xu

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  1. Jihua Zhang
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  2. Xuejun Jin
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  3. Zuyao Xu
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Project supported by the National Science Foundation of China (Grant No. 59671023).

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Zhang, J., Jin, X. & Xu, Z. Thermodynamic prediction ofM s in Fe−Mn−Si shape memory alloys associated with fcc (γ) → hcp (ε) martensitic transformation. Sci. China Ser. E-Technol. Sci. 42, 561–566 (1999). https://doi.org/10.1007/BF02916992

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  • DOI: https://doi.org/10.1007/BF02916992

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