4.6 Article

Effect of Hydrogen Doping on Stress-Induced Martensitic Transformation in a Ti-Ni Shape Memory Alloy

Publisher

SPRINGER
DOI: 10.1007/s11661-019-05258-1

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Funding

  1. National Natural Science Foundation of China [51871151, 51501113, U1564203]
  2. National Key R&D Program of China [2017YFB0703003, 2017YFB0406000]
  3. Iketani Science and Technology Foundation [0301012-A]

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In this paper, we report how the charged hydrogen in a Ti-50.8Ni (at.pct) alloy acts during stress-induced martensitic transformation and aging. Hydrogen is preferentially trapped in the B19' martensite phase near the surface of the specimen. The hydride formed by hydrogenation dissociates during the stress-induced martensitic transformation. The hydrogen diffuses into the interior of the specimen through aging in air, resulting in suppression on the stress-induced martensitic transformation.

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