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+...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.展开更多
基金Project supported by the National Natural Science Foundation of China (Grant No. 59671023).
文摘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.
