Martensite Transformation and Memory Effect in the NiTi Alloy

DOI Web Site Web Site BIBCODE 6 Citations 20 References
  • Nagasawa Akira
    Department of Physics, Faculty of Science, Osaka City University

Bibliographic Information

Other Title
  • Martensite transformation and memory effect in the NiTi alloys

Search this article

Description

Martensite transformation in the NiTi alloy has been studied by selected area electron diffraction. The martensites have such close packed layer structures as 4H (2\bar2) and 12 R (3\bar1)3. The 2H and 18R martensites are also sometimes observed. The 12R martensite appears dominantly at room temperature but the 4H martensite is formed below 0°C. They are closely connected with each other through stacking faults. The martensite transformation causes a considerable shear of layers, but, in order to release it, a new phase transformation occurs in the matrix neighbouring the martensites. By cold work, the 4H martensite and the new phase are also produced. The present results make crystallographically clear the nature of the martensite transformation in the NiTi alloy. On the basis of the results, mechanism of the memory effect in the alloy is interpreted. Origin of the memory effect in metals and alloys are also discussed.

Journal

Citations (6)*help

See more

References(20)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top