Investigation of Martensitic Phase Transformation and Magnetic Properties of Fe-30%Ni-2.6wt%Mo-X%Co Alloys

Authors : Erdem YAŞAR, Osman ARMAĞAN, Talip KIRINDI, Merve Sultan AKAY AĞIR

Pages : 27-32

Doi:10.19113/sdufenbed.1094481

View : 22 | Download : 5

Publication Date : 2023-04-25

Article Type : Research Paper

Abstract :In this study, the microstructure of thermal effective martensitic phase transformation observed in the Fe-30wt.%Ni-2.6wt.%Mo-Xwt.%Co insert ignore into journalissuearticles values(X = 0.8, 1.8); alloy was investigated morphologically and crystallographically by using Scanning Electron Microscopy insert ignore into journalissuearticles values(SEM); and Transmission Electron Microscopy insert ignore into journalissuearticles values(TEM);. In SEM studies, it was observed that the morphology of the martensite phase changed from lath and lenticular structure to massive structure with the addition of Co to the alloy. In addition to this, nano martensite formation was also observed as another effect of Co addition insert ignore into journalissuearticles values(figure 2c, d);. Properties of lenticular martensite, electron diffraction pattern of austenite and martensite structures were given by TEM studies. According to the Differential Scanning Calorimetry insert ignore into journalissuearticles values(DSC); analysis, it was determined that the martensitic transformation temperature insert ignore into journalissuearticles values(Ms); significantly increased with the increase of the Co amount in the alloys. Also, by using Mössbauer spectroscopy, it was shown that the amount of martensite increased with the increase of Co amount and the magnetic order of the alloy changed accordingly.
Keywords : Termal etkili martensit, Kristalografik özellikler, Manyetik özellikler, TEM, SEM, Mössbauer Spektroskopisi