Gaining flexibility in the design of microstructure, texture and shape memory properties of an Fe-Mn-Si-Cr-Ni alloy processed by ECAE and annealing
- Druker, Ana Velia
- Baruj, Alberto Leonardo
- Isola, Lucio Manuel
- Fuster, Valeria de Los Angeles
- Malarria, Jorge Alberto
- Bolmaro, Raul Eduardo
DOIAbstract
The effect of ECAE on the properties of an Fe-15Mn-5Si-9Cr-5Ni shape memory alloy (SMA) was investigated. Phases, texture, microstructure, critical temperatures, mechanical and SM properties after severe deformation, and the effect of annealingwere analysed. One ECAE pass develops a shear texture. There is a large 〈101〉 component in the extrusion direction,which is near the ideal 〈414〉 for martensitic transformation activation. The pressing did not refine the previous as cast structure but introduced dislocations and ε-martensite. Thus, the stress to induce the Γ → ε martensitic transformation, σΓ → ε, reached 620 MPa, and the quantity of ε-martensite formed after compression was limited. The degree of shape recoverywas reduced,while the re...
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