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Influence of heat treatment on the strength and fracture behaviour of Fe-12Cr-6Al ferritic stainless steel

Sastry, Srinivas D and Rohatgi, PK and Abraham, KP and Prasad, YVRK (1982) Influence of heat treatment on the strength and fracture behaviour of Fe-12Cr-6Al ferritic stainless steel. In: Journal of Materials Science, 17 (10). pp. 3009-3016.

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Abstract

The changes in the tensile properties and fracture mode brought about by heat treatment of Fe-12Cr-6Al ferritic stainless steel have been studied. A favourable combination of high strength and good ductility is obtained by heating the material at 1370 K for 2 h followed by a water quench. The high-temperature treatment results in carbide dissolution as well as an increase in the grain size. The mechanism of strengthening has been evaluated from the apparent activation energy (28 kJ mol–1) and is identified to be the unpinning of dislocations from the atmosphere of carbon atoms. As the heat-treatment temperature is increased, the fracture behaviour changes from ductile to brittle mode and this is related to the changes in grain size and friction stress.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Springer.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 21 Aug 2009 10:56
Last Modified: 23 Feb 2012 05:07
URI: http://eprints.iisc.ernet.in/id/eprint/20451

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