4.6 Article

In-Situ Study on Texture-Dependent Martensitic Transformation and Cyclic Irreversibility of Superelastic NiTi Shape Memory Alloy

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SPRINGER
DOI: 10.1007/s11661-019-05563-9

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Funding

  1. Alexander von Humboldt Foundation
  2. National Key Research and Development Program of China [2017YFB0701801]

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The texture-dependent mechanical response of superelastic NiTi sheet with dominant {111} fiber is investigated via in-situ digital image correlation (DIC). A new parameter is introduced to evaluate and estimate material irreversibility. We find that transformation strain and cyclic irreversibility evolve nonmonotonically with tensile direction. We confirm that diffused fiber close to {110} plays an important role in the variation of mechanical response.

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