Martensitic transformation, mechanical property and magnetic-field-induced strain of Ni–Mn–Ga alloy fabricated by spark plasma sintering

▶ Ni–Mn–Ga shape memory alloys have been fabricated by the spark plasma sintering technique. ▶ The ductility of sintered Ni–Mn–Ga alloys is significantly enhanced compared to the specimen obtained by conventional melting technique. ▶ The highest fracture strain of 27% up to now has been reported. ▶...

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Bibliographic Details
Published in:Journal of alloys and compounds 2011-03, Vol.509 (10), p.4081-4083
Main Authors: Tian, X.H., Sui, J.H., Zhang, X., Feng, X., Cai, W.
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Deformation and plasticity (including yield, ductility, and superplasticity)
Exact sciences and technology
Ferromagnetic shape memory alloys
Fracture mechanics
Magnetic properties
Martensitic transformations
Materials science
Mechanical and acoustical properties of condensed matter
Mechanical properties
Mechanical properties of solids
Mechanical property
Nickel base alloys
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Phase transitions
Physics
Sintering
Spark plasma sintering
Strain
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Summary:▶ Ni–Mn–Ga shape memory alloys have been fabricated by the spark plasma sintering technique. ▶ The ductility of sintered Ni–Mn–Ga alloys is significantly enhanced compared to the specimen obtained by conventional melting technique. ▶ The highest fracture strain of 27% up to now has been reported. ▶ The magnetic-filed-induced strain in sintered Ni–Mn–Ga alloys has been studied for the first time. Martensitic transformation, mechanical property and magnetic-field-induced strain of Ni–Mn–Ga alloys obtained using the spark plasma sintering method have been investigated. The results show that the martensitic transformation of the sintered specimen is basically similar to that of conventional bulk alloys. The ductility of sintered Ni–Mn–Ga alloys is significantly enhanced compared to the specimen obtained by conventional melting technique. The highest fracture strain so far is reported. Moreover, magnetic-filed-induced strain in sintered Ni–Mn–Ga alloys has been studied for the first time.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2011.01.001