Microstructure and Texture Evolution of Cold Worked 304 Stainless Steel Experimental and Modelling

Abstract:

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A micromechanical model was used to simulate the mechanical behaviour, the transformation kinetic and the texture evolutions of a 304 stainless steel, deformed by tensile tests at T=–60°C. When the transformation strain is calculated with the phenomenological theory, the model does not very well predict the observed transformation rate and the texture evolution of the main γ grain orientations. XRD and EBSD analyses show that the martensitic transformation of γ phase into α’ martensite involves the intermediate ε phase. From these observations, new simulations were performed in which only the γ→ε transformation strain is considered in competition with classical plasticity of austenite. The α’ variants were calculated in a second step, from the ε variants selected in the micromechanical model. Among the 6 potential α’ variants able to nucleate from the same ε variant, the best oriented ones, with respect to the applied stress were selected. Under these conditions, the numerical simulations reproduce the experimental results in a more satisfying way.

Info:

Periodical:

Materials Science Forum (Volumes 495-497)

Edited by:

Paul Van Houtte and Leo Kestens

Pages:

405-410

DOI:

10.4028/www.scientific.net/MSF.495-497.405

Citation:

B. Petit et al., "Microstructure and Texture Evolution of Cold Worked 304 Stainless Steel Experimental and Modelling ", Materials Science Forum, Vols. 495-497, pp. 405-410, 2005

Online since:

September 2005

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Price:

$35.00

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