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A thermodynamic explanation for martensitic phase stability of nanostructured Fe-Ni and Co metallic materials |
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| Authors: | Wei Li Ping LiuFengcang Ma Xinkuan LiuYonghua Rong |
| Affiliation: | a School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China b School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China |
| Abstract: | In order to explain the experimental facts that start temperatures of reverse martensite transformation (As) for nanostructured Fe-Ni and Co are lower than those for their coarse-grained counterparts, a thermodynamic model was established in this paper. The thermodynamic analysis shows that the decrease of As for nanostructured Fe-Ni and Co can be attributed to the difference of surface free energy for martensite and austenite. The correlation between the decrease of As and start temperature of martensitic transformation (Ms) in nanostructured material is further proposed. |
| Keywords: | Nanostructured materials Reverse martensitic transformation Thermodynamics Modeling Surface energy |
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