Magnetic properties of cyclically deformed austenite

Das, Arpan (2014) Magnetic properties of cyclically deformed austenite. Journal of Magnetism and Magnetic Materials, 361 (IF-2.002). pp. 232-242.

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In meta stable austenitic stainless steels, low cycle fatigue deformation is accompanied by a partial stress/strain-induced solid state phase transformation of paramagnetic gamma(fcc) austenite phase to ferromagnetic alpha'(bcc) martensite. The measured characteristic of magnetic properties, which are the saturation magnetization, susceptibility, coercivity, retentivity, and the area under the magnetic hysteresis loop are sensitive to the total strain amplitude imposed and the Coffesporiding material behaviour. The morphologies and nucleation characteristics of deformation induced martensites (i.e., e(hcp), alpha'(bcc)) have been investigated through analytical transmission electron microscope. It has been observed that deformation induced martensites can nucleate at a number of sites (i.e., shear band intersections, isolated shear bands, shear band-grain boundary intersection, grain boundary triple points, etc.) through multiple transformation sequences: gamma(fcc)->epsilon(hcp), gamma(fcc) -> epsilon(hcp) -> alpha/ (bcc), gamma(fcc) -> deformation twin -> alpha' (bcc) and gamma(fcc) -> alpha' (bcc). (C) 2014 Elsevier B.V. All rights reserved

Item Type:Article
Official URL/DOI:
Uncontrolled Keywords:Austenitic stainless steel; Deformation induced martensite; Low cycle fatigue; Magnetic property; Transmission Electron Microscopy
Divisions:Material Science and Technology
ID Code:6937
Deposited By:Sahu A K
Deposited On:16 Jun 2014 10:16
Last Modified:04 May 2016 13:12
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