2011•Zhongguo cailiao jinzhanRequires access

Recent Developments of Martensitic Transformation in Ferrous Shape Memory Alloys

Yonghong Geng

Abstract

shape memory effect and superelasticity of Fe-based alloys depend on the natures of martensitic transformation in iron-based alloy.Understanding of martensitic transformation in iron-based alloys is important for development and optimization of Fe-based shape memory alloys.Based on the different features of martensitic transformation,Fe-based shape memory alloys are divided into three categories,including Fe-Mn-Si,Fe-Ni-Co and Fe-Pt/Fe-Pd system.Recent development of martensitic transformation in these three types of Fe-based shape memory alloys are reviewed in this manuscript,respectively.The different mechanism with which shape memory effects are associated and the factors to influence martensitic transformation are summarized.The prospect for developing new iron-based shape memory alloys is also discussed.

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Key concepts: Shape-memory alloy, Diffusionless transformation, Materials science, Pseudoelasticity, Martensite, Metallurgy, Transformation (genetics), Alloy