Optimization of cold and warm workability in 304 stainless steel using instability maps

Venugopal, S and Mannan, SL and Prasad, YVRK (1996) Optimization of cold and warm workability in 304 stainless steel using instability maps. In: Metallurgical and Materials Transactions A, 27 (1). pp. 119-126.

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Abstract

The deformation characteristics of stainless steel type AISI 3O4 under compression in the temperature range 20 degrees C to 600 degrees C and strain-rate range 0.001 to 100 s(-1) have been studied with a view to characterizing the flow instabilities occurring in the microstructure. At strain rates less than 5 s(-1), 304 stainless steel exhibits flow localization, whereas dynamic strain aging occurs at intermediate temperatures and below 0.5 s(-1). At room temperatures and strain rates less than 10 s(-1), martensite formation is observed. To avoid the preceding microstructural instabilities, cold and warm working should be carried out at strain rates greater than 5 s(-1). The continuum criterion, developed on the basis of the principles of maximum rate of entropy production and separability of the dissipation function, predicts accurately all the preceding instability features.

Item Type:	Journal Article
Additional Information:	Copyright of this article belongs to The Minerals, Metals & Materials Society.
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	07 May 2011 04:19
Last Modified:	07 May 2011 04:19
URI:	http://eprints.iisc.ernet.in/id/eprint/37445

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