Microstructure, martensitic transformation and mechanical properties of Ni–Mn–Sn alloys by substituting Fe for Ni
| Autor: | Changlong Tan, Xiaohua Tian, Erjun Guo, Ming-yang Wu, Kun Zhang, Zhi-cheng Feng |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Alloy Metals and Alloys 02 engineering and technology Crystal structure Shape-memory alloy engineering.material 021001 nanoscience & nanotechnology Geotechnical Engineering and Engineering Geology Condensed Matter Physics Microstructure Mole fraction 01 natural sciences Intergranular fracture Crystallography Ferromagnetism Diffusionless transformation 0103 physical sciences Materials Chemistry engineering 0210 nano-technology |
| Zdroj: | Transactions of Nonferrous Metals Society of China. 27:2234-2238 |
| ISSN: | 1003-6326 |
| DOI: | 10.1016/s1003-6326(17)60249-8 |
| Popis: | The effects of partial substitution of Fe element for Ni element on the structure, martensitic transformation and mechanical properties of Ni 50– x Fe x Mn 38 Sn 12 ( x =0 and 3%, molar fraction) ferromagnetic shape memory alloys were investigated. Experimental results indicate that by substitution of Fe for Ni, the microstructure and crystal structure of the alloys change at room temperature. Compared with Ni 50 Mn 38 Sn 12 alloy, the martensitic transformation starting temperature of Ni 47 Fe 3 Mn 38 Sn 12 alloy is decreased by 32.5 K. It is also found that martensitic transformation occurs over a broad temperature window from 288.9 to 352.2 K. It is found that the mechanical properties of Ni–Mn–Sn alloy can be significantly improved by Fe addition. The Ni 47 Fe 3 Mn 38 Sn 12 alloy achieves a maximum compressive strength of 855 MPa with a fracture strain of 11%. Moreover, the mechanism of the mechanical property improvement is clarified. Fe doping changes the fracture type from intergranular fracture of Ni 50 Mn 38 Sn 12 alloy to transgranular cleavage fracture of Ni 47 Fe 3 Mn 38 Sn 12 alloys. |
| Databáze: | OpenAIRE |
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