کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
673961 | 1459536 | 2012 | 5 صفحه PDF | دانلود رایگان |
In this study, the effect of heat treatment on physical properties such as crystal structure, transformation temperatures, thermodynamic behavior and activation energy of Ni50.5Mn29.5Ga20 (at.%) off-stoichiometric Heusler alloys was investigated. The heat treatments were conducted at 800 °C, 900 °C and 1000 °C for 2 h in argon atmosphere and then samples were quenched in ice brine. It has been found that the heat treated alloys possess a coexistence phase of martensite and gamma (γ) phases while the untreated alloy is γ phase free. Moreover, elevating the annealing temperature resulted in increased martensitic transformation temperatures.
► Heat treatment on the physical properties of Ni50.5Mn29.5Ga20 alloys was investigated.
► The heat treatments were conducted at 800 °C, 900 °C, and 1000 °C for 2 h in argon atmosphere.
► Heat treatment emerged as a new phase, which improves ductility.
► Heat treatment changed the thermal properties of NiMnGa alloys.
Journal: Thermochimica Acta - Volume 548, 20 November 2012, Pages 51–55