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Investigations of a nanostructured FeMnSi shape memory alloy produced via severe plastic deformation |
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| Authors: | Gheorghe?Gurau |
| Affiliation: | 1.Faculty of Engineering, “Dun?rea de Jos” University of Galati,Galati,Romania;2.Department of Metallurgical and Materials Engineering,Indian Institute of Technology Madras,Chennai,India;3.Faculty of Materials Science and Engineering, “Gheorghe Asachi” Technical University of Ia?i,Ia?i,Romania |
| Abstract: | Low-costiron-based shape memory alloys (SMAs) show great potential for engineering applications. The developments of new processing techniques have recently enabled the production of nanocrystalline materials with improved properties. These developments have opened avenues for newer applications for SMAs. The influence of severe plastic deformation induced by the high-speed high-pressure tor-sion (HSHPT) process on the microstructural evolution of an Fe–Mn–Si–Cr alloy was investigated. Transmission electron microscopic analysis of the alloy revealed the existence of nanoscale grains with an abundance of stacking faults. The high density of dislocations charac-teristic of severe plastic deformation was not observed in this alloy. X-ray diffraction studies revealed the presence ofε-martensite with an HCP crystal structure andγ-phase with an FCC structure. |
| Keywords: | iorn manganese silicon alloys shape memory effect nanostructured materials martensite plastic deformation |
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