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Science in China Series E: Technological Sciences

, Volume 47, Issue 6, pp 710–715 | Cite as

Influence of stresses on martensitic transformation in ferromagnetic shape memory Ni50Mn19Fe6Ga25 ribbons

  • Meng Fanbin 
  • Li Yangxian 
  • Liu Heyan 
  • Qu Jingping 
  • Liu Zhuhong 
  • Chen Jinglan 
  • Wu Guangheng 
Article
  • 19 Downloads

Abstract

The influence of stresses on martensitic transformation in Ni50Mn19Fe6Ga25 melt-spun ribbons was studied. X-ray diffraction examination shows that the ribbon has a pure cubic L21 phase at room temperature and that the ribbon surface exhibits [100] preferentially oriented texture, while the [110] axis is about 45° tilted from the normal of the ribbon. By calculating the d spacing at different angles with the length direction of the ribbon, the tension was observed. It was found that the direction of the stress was along [010] direction of the oriented textured grains. During cooling, there is no obvious structural transition observed in as-spun ribbons. However, when the ribbons were annealed at 900 K for 24 h, the tension along [010] direction disappeared and the structural transition from cubic to tetragonal occurred obviously during cooling. It indicates that it is the tension along [010] direction to suppress the martensitic transformation in the as-spun ribbons.

Keywords

stress martensitic transformation ferromagnetic shape memory alloy 

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Copyright information

© Science in China Press 2004

Authors and Affiliations

  • Meng Fanbin 
    • 1
  • Li Yangxian 
    • 1
  • Liu Heyan 
    • 1
  • Qu Jingping 
    • 1
  • Liu Zhuhong 
    • 2
  • Chen Jinglan 
    • 2
  • Wu Guangheng 
    • 2
  1. 1.School of Material Science and EngineeringHebel University of TechnologyTianjinChina
  2. 2.State Key Laboratory for Magnetism, Institute of PhysicsChinese Academy of SciencesBeijingChina

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