Conferences

MICROSTRUCTURE AND PHASE TRANSFORMATION IN Ni50Mn40Sn10 SHAPE MEMORY ALLOY

D.Saini,
 
S.Singh,
 
M.K.Banerjee,
 
K.Sachdev
 

Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2018, #05/06
http://www.materials.kiev.ua/article/2541

Abstract

In the present work, a ternary Heusler alloy of composition Ni50Mn40Sn10 with a high martensitic transformation temperature has been prepared by arc-melting technique. The crystal structure of the obtained alloy is investigated by X-ray diffraction. The microstructure of the specimen sintered at 950 °C for 72 h followed by ice-water quenching shows needle-like martensitic structure. Energy dispersive spectroscopy is utilized for compositional study. The differential scanning calorimetry result shows that the alloy undergoes a martensitic transformation at 190 °C upon cooling. The M–H curve suggests paramagnetic nature of the martensite phase at room temperature. The present alloy system has a great potential to be used for high-temperature shape memory applications. Experimental data of this study may be useful for developing Ga-free high-temperature shape memory alloys.


ARC MELTING, HEUSLER ALLOY, MARTENSITIC TRANSFORMATION, SHAPE MEMORY ALLOYS