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Formation of annular austenitic ring between outer ferrite layer and solid globule in a semi-solid processed SS 304L

Samantaray, Dipti and Kumar, Vinod and Bhaduri, AK and Dutta, Pradip (2014) Formation of annular austenitic ring between outer ferrite layer and solid globule in a semi-solid processed SS 304L. In: MATERIALS LETTERS, 135 . pp. 127-130.

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Official URL: http://dx.doi.org/ 10.1016/j.matlet.2014.07.152

Abstract

The microstructure of an austenitic SS 304L rapidly quenched from its semi-solid state shows a unique annular austenitic ring in between the core of each globule and its ferritic outer layer. On the basis of experimental results and microstructural analysis, it is proposed that the ring is formed as a result of preferential austenitic phase nucleation in a small quantity of liquid entrapped between adjacent solid globules during rapid quenching, in spite of the fact that ferrite is the thermodynamically stable phase for the alloy. (C) 2014 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Keywords: Steel; Semi-solid processing; Solidification; Microstructure
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Depositing User: Id for Latest eprints
Date Deposited: 09 Nov 2014 07:09
Last Modified: 09 Nov 2014 07:09
URI: http://eprints.iisc.ac.in/id/eprint/50212

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