J. Mater. Sci. Technol. ›› 2009, Vol. 25 ›› Issue (05): 649-654.

• Articles • 上一篇    下一篇

Effect of alloying elements on microstructure, martensitic transformation and mechanical properties of Ni-Mn based alloys

Kelly Alvarez   

  1. Center for Geo-environmental Science;Faculty of Engineering and Resource Science;Akita University;Japan
  • 收稿日期:2008-03-05 修回日期:2009-07-01 出版日期:2009-09-28 发布日期:2009-10-10
  • 通讯作者: Kelly Alvarez

Effect of Alloying Elements on Microstructure, Martensitic Transformation and Mechanical Properties of Ni-Mn Based Alloys

K. Alvarez, H.Y. Kim, S. Miyazaki   

  1. 1) Graduate School, University of Tsukuba, Ibaraki 305-8573, Japan
    2) Institute of Materials Science, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
  • Received:2008-03-05 Revised:2009-07-01 Online:2009-09-28 Published:2009-10-10
  • Contact: Alvarez Kelly

关键词: Ni-Mn based alloys;Martensitic transformation temperature;L10 phase;TEM

Abstract:

The microstructural features, shape memory behavior and mechanical properties of Ni-Mn based alloys were investigated by differential scanning calorimetry (DSC), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and thermal cycling test under various stresses. The transformation temperatures shifted toward lower temperatures when adding a third element into the Ni-Mn system. The addition of 10 at. pct Fe increased considerably the mechanical properties exhibiting still high transformation temperatures. However, it was found that in NiMn40Fe10 alloy the martensitic transformation is not thermoelastic in nature. The mechanism of this transformation and the crystallography of Ni-Mn(50-x)-Fex (x=5, 7, 10, 20 at. pct) alloys are presented.

Key words: Ni-Mn based alloys, Martensitic transformation temperature, L10 phase