Effect of hot working on dynamic recrystallisation study of as-cast austenitic stainless steel

Mandal, G K and Stanford, Nicole and Hodgson, Peter and Beynon, John H (2012) Effect of hot working on dynamic recrystallisation study of as-cast austenitic stainless steel. Materials Science and Engineering A, 556 . pp. 658-695.

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Dynamic recrystallisation (DRX) behaviour of as-cast austenitic stainless steel strip is investigated in order to study the extent of DRX that could heavily refine the as-cast austenite prior to phase transformation. The specimens were very quickly heated to the deformation temperatures to ensure that there was little or no change to the as-cast structure in order to simulate accurately the microstructure evolution and recrystallisation behaviour of the cast strip on reheating in the thermo-mechanical testing system. This investigation will assist the generation of the fundamental knowledge required to develop advanced high strength and formable steels using thin strip/slab casting processes. The results reveal that DRX of the coarse austenite grains is a relatively slow process and austenite will be refined completely by DRX under high deformation temperature (1100–1200 1 C) and slow strain rate (0.5–5 s 1) conditions. It is observed that new grains nucleate predominantly at the parent austenite grain boundaries and tend to form in clusters.

Item Type:Article
Official URL/DOI:http://dx.doi.org/10.1016/j.msea.2012.07.050
Uncontrolled Keywords:Recrystallisation, Austenitic stainless steel,Coarse columnar grain, Plane strain compression
Divisions:Metal Extraction and Forming
ID Code:5891
Deposited By:Dr Gopi Kishor Mandal
Deposited On:16 Aug 2012 09:56
Last Modified:15 Jan 2014 12:41
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