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- Title
Effect of Mn Concentration on Magneto-mechnaical Properties in Directionally Solidified Ferromagnetic Shape Memory Ni-Mn-Ga Alloys.
- Authors
Singh, R. K.; Raja, M. Manivel; Ghosal, P.; Mathur, R. P.
- Abstract
Heusler type alloys Ni50Mn25+xGa25-x (x = 2, 3, 4, and 5) based on near stoichiometric Ni2MnGa compositions were directionally solidified using modified Bridgman method. The alloys thus prepared were characterised for their chemical composition, crystal structure, microstructure, phase transformation, magnetic and magneto-mechanical properties. The directionally solidified Ni50Mn30Ga20 alloy rod exhibited maximum magnetocrystalline value of 95 kJm-3 and lowest detwinning stresses for martensite phase of about 5 MPa. The reversible room temperature magnetic field induced strain of 0.2 per cent under external magnetic field of 0.6 T and 0.05 kN bias load was obtained for the directionally solidified Ni50Mn30Ga20 alloy.
- Subjects
HEUSLER alloys; STOICHIOMETRIC combustion; BRIDGMANITE; CRYSTAL structure; MAGNETIC anisotropy
- Publication
Defence Science Journal, 2016, Vol 66, Issue 4, p391
- ISSN
0011-748X
- Publication type
Article
- DOI
10.14429/dsj.66.10214