Effect of hydrogen redistribution during aging on the structure and phase state of nanocrystalline and coarse-grained TiNi alloys

Anatoly Baturin, Aleksander Lotkov, Victor Grishkov, Ivan Rodionov, Victor Kudiiarov

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6 Citations (Scopus)

Abstract

The report presents research data showing how the phase state and transition temperatures in hydrogenated nanocrystalline and coarse-grained TiNi alloys are influenced by hydrogen redistribution on their aging at room temperature. The research methods include four-point measurements of resistivity as a function of temperature and differential scanning calorimetry at 173–373 K. The results demonstrate that hydrogen diffusion in the material bulk provides gradual suppression of B2→B19′ and R→B19′ transformations and that the temperature of B2→R transformation is hardy sensitive to hydrogen. Also presented is an analysis of the mechanism by which hydrogen acts on the temperatures and sequence of martensite transformations.

Original languageEnglish
Pages (from-to)359-363
Number of pages5
JournalJournal of Alloys and Compounds
Volume751
DOIs
Publication statusPublished - 30 Jun 2018

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Keywords

  • Aging
  • DSC
  • Hydrogen
  • Martensite transformation
  • Nanocrystalline and coarse-grained structure
  • TiNi alloy

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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