Investigations of a nanostructured FeMnSi shape memory alloy produced via severe plastic deformation
来源期刊：International Journal of Minerals Metallurgy and Materials2016年第11期
论文作者：Gheorghe Gurau Carmela Gurau Vedamanickam Sampath Leandru Gheorghe Bujoreanu
文章页码：1315 - 1322
摘 要：Low-cost iron-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 torsion（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 characteristic of severe plastic deformation was not observed in this alloy. X-ray diffraction studies revealed the presence of ε-martensite with an HCP crystal structure and γ-phase with an FCC structure.
Gheorghe Gurau1，Carmela Gurau1，Vedamanickam Sampath2，Leandru Gheorghe Bujoreanu3
1. Faculty of Engineering,“Dun?rea de Jos” University of Galati2. Department of Metallurgical and Materials Engineering,Indian Institute of Technology Madras3. Faculty of Materials Science and Engineering,“Gheorghe Asachi” Technical University of Ia?i
摘 要：Low-cost iron-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 torsion（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 characteristic of severe plastic deformation was not observed in this alloy. X-ray diffraction studies revealed the presence of ε-martensite with an HCP crystal structure and γ-phase with an FCC structure.
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