Development of Texture and Microstructure During Cold Rolling and Annealing of a Fe-Based Shape Memory Alloy |
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Authors: | Bikas C Maji Madangopal Krishnan Vijay Hiwarkar Indradev Samajdar R K Ray |
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Affiliation: | 1. Materials Science Division, Bhabha Atomic Research Centre, Mumbai, 400 085, India 2. Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology, Powai, Mumbai, 400 076, India 3. R&D Division, Tata Steel, Jamshedpur, 831 001, India
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Abstract: | Texture evolution and microstructural changes during cold rolling and annealing of Fe-14Mn-6Si-9Cr-5Ni shape memory alloy have been investigated. The starting solution-annealed material has a nearly random texture with microstructure composed of equiaxed austenite grains with ε martensite plates inside. Cold rolling induces a strong alloy type texture with Brass {011}〈211〉 and Goss {011}〈100〉 as major components. Annealing of the cold-deformed material produces a nearly random texture. The microstructural investigation reveals that with increase in cold deformation, the amount of stress-induced ε and α′ martensite volumes increase. The electron back-scattered diffraction (EBSD) phase mapping shows that reversion of the ε martensite begins only after recrystallization sets in at a temperature of 1073 K. |
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