Abstract
In this work, we investigate the effects of the FCC-BCC Bain transformation on the magnetic properties. We focus on the Bain corresponding that of BCC martensite phase which emerges via a contraction of the z-axis by about 20% and an expansion of the x- and y-axis by about 12% in the FCC austenite phase. To obtain Bain strain, we consider the BCT lattice (from the FCC with a = 2a) and we apply the Bain strain to BCT lattice as aBCT = bBCT = a$$ \sqrt{2} $$ and cBCT = 2a. Then, with the contraction of the z-axis by 20% and an expansion of the x- and y-axis by 13.137% of BCT lattice, we obtain a new BCC martensite lattice with aBCC = 1.6a. We find that the differences in the magnetization of austenite BCT lattice and martensite BCC lattice are very small. Therefore, we obtain very small thermal magnetization loop area versus temperature and we suggest that the prediction of Edgar Collins Bain on FCC-BCC transformations (or Bain strain) is remarkable and very successful.
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