Effect of heat treatment on the physical properties of Ni–Mn–Ga alloy
作者： Mediha Kök , Yıldırım Aydogdu
DOI: 10.1016/J.TCA.2012.08.030
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摘要: Abstract In this study, the effect of heat treatment on physical properties such as crystal structure, transformation temperatures, thermodynamic behavior and activation energy Ni50.5Mn29.5Ga20 (at.%) off-stoichiometric Heusler alloys was investigated. The treatments were conducted at 800 °C, 900 °C 1000 °C for 2 h in argon atmosphere then samples quenched ice brine. It has been found that treated possess a coexistence phase martensite gamma (γ) phases while untreated alloy is γ free. Moreover, elevating annealing temperature resulted increased martensitic temperatures.
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