Hydrogenation of TiNi shape memory alloy produced by mechanical alloying

Takeshi Saito, Tomonori Yokoyama, Akito Takasaki

研究成果: Article

12 引用 (Scopus)

抄録

TiNi intermetallic compounds, produced by a combination of mechanical alloying and direct current sintering, were hydrogenated at several hydrogen pressures at 473 K for 4 h to investigate their hydrogen desorption and martensitic transformation behaviors. The microstructures and the hydrogen desorption properties were dependent on levels of hydrogen concentrations. The crystal lattice of TiNi (B2) phase expanded and TiNi hydride formed with an increase in hydrogen pressure. Two stage martensitic and reverse transformations were observed at low hydrogen concentration. An enthalpy of martensitic transformation was lower than that of reverse transformation. TiNi (martensite) phase was confirmed at intermediate hydrogen concentration, suggesting that hydrogen-induced martensitic transformation occurred during hydrogenation. No martensitic and reverse transformations occurred at high hydrogen concentration because of the hydride formation.

元の言語English
ジャーナルJournal of Alloys and Compounds
509
発行部数SUPPL. 2
DOI
出版物ステータスPublished - 2011 9

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Mechanical alloying
Shape memory effect
Hydrogenation
Hydrogen
Martensitic transformations
Hydrides
Desorption
Martensite
Crystal lattices
Intermetallics
Enthalpy
Sintering
Microstructure

ASJC Scopus subject areas

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

これを引用

Hydrogenation of TiNi shape memory alloy produced by mechanical alloying. / Saito, Takeshi; Yokoyama, Tomonori; Takasaki, Akito.

:: Journal of Alloys and Compounds, 巻 509, 番号 SUPPL. 2, 09.2011.

研究成果: Article

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