Search

Article

x

留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码

Effect of internal stress on sructure, martensitic transformation and magnetic properties of ferromagnetic shape memory alloy Mn2NiGa

Song Rui-Ning Zhu Wei Liu En-Ke Li Gui-Jiang Chen Jing-Lan Wang Wen-Hong Li Xiang Wu Guang-Heng

Effect of internal stress on sructure, martensitic transformation and magnetic properties of ferromagnetic shape memory alloy Mn2NiGa

Song Rui-Ning, Zhu Wei, Liu En-Ke, Li Gui-Jiang, Chen Jing-Lan, Wang Wen-Hong, Li Xiang, Wu Guang-Heng
PDF
Get Citation
Metrics
  • Abstract views:  5371
  • PDF Downloads:  582
  • Cited By: 0
Publishing process
  • Received Date:  11 February 2011
  • Accepted Date:  11 April 2011
  • Published Online:  20 January 2012

Effect of internal stress on sructure, martensitic transformation and magnetic properties of ferromagnetic shape memory alloy Mn2NiGa

  • 1. State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences, Bejing 100190, China;
  • 2. School of Material Sciences & Engineering, Beijing Institute of Technology, Beijng 100081, China
Fund Project:  Project supported by the National Natural Science Foundation of China (Grant No.50971055) and the National Basic Research Program of China (973 Program, 2010CB833102).

Abstract: The structures, the martensitic transformations and the magnetic properties of ferromagnetic shape memory alloy Mn2NiGa with the loading and the unloading of the external compressive stress are investigated. The plastic deformation occurring during the stressing causes a high level of dislocation defects existing in the sample. The residual internal stress results in a significant increase of the reversed transformation temperature. The threshold value of compressive pressure for causing the completely martensitic transformation at room temperature is identified to be 1.0 GPa based on the experimental measurements of XRD and magnetic coercivity. The coercivity of the martensitic phase increases from 50 Oe to 350 Oe due to the application of the external stress up to 2.0 GPa. It is also observed that the reversed martensitic transformation occurrs, when the sample is treated by heating up to about 730 K. This is attributed to the elimination of the dislocation by the annealing effect. Such a high reverse martensitic transformation temperature allows the measurement of the Curie temperature of martensitic phase and the obtained value is 530 K.

Reference (14)

Catalog

    /

    返回文章
    返回