Influence of grain boundary on pseudoelasticity in highly-oriented polycrystalline Ni52Fe17Ga27Co4 ferromagnetic shape memory alloy

High-temperature pseudoelasticity was investigated in highly-oriented polycrystalline Ni52Fe17Ga27Co4 ferromagnetic shape memory alloy. The pseudoelastic behaviors and the kinetics of the martensitic transformation are significantly affected by the intersection angle between the loading direction an...

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Bibliographic Details
Published inMaterials letters Vol. 114; pp. 11 - 14
Main Authors Huang, Y J, Hu, Q D, Bruno, N, Karaman, I, Li, J G
Format Journal Article
LanguageEnglish
Published 01.01.2014
Subjects
Ferromagnetism
Grain boundaries
Intersections
Martensitic transformations
Pseudoelasticity
Recovery
Shape memory alloys
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Summary:High-temperature pseudoelasticity was investigated in highly-oriented polycrystalline Ni52Fe17Ga27Co4 ferromagnetic shape memory alloy. The pseudoelastic behaviors and the kinetics of the martensitic transformation are significantly affected by the intersection angle between the loading direction and the grain boundaries. For the intersection angle of 0 degree , a complete pseudoelastic recovery of 5% is achieved at 348K. In contrast, only partial pseudoelastic recovery is observed for the intersection angle of 90 degree . At a constant pressure of 50MPa, the martensitic transformation starting temperature increases from 346K to 360K as the intersection angle changes from zero to 90 degree .
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ISSN:0167-577X
DOI:10.1016/j.matlet.2013.09.109