Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/230469

Title

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

Author(s)

Mandal, Gopi K.;  Stanford, Nicole;  Hodgson, Peter;  Beynon, John H.

Abstract

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 °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.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Engineering and Industrial Sciences

Source

Materials Science and Engineering A, Vol. 556 (Oct 2012), pp. 685-695

Publication year

2012

FOR Code(s)

0912 Materials Engineering;  0913 Mechanical Engineering

Keyword(s)

Austenitic stainless steel;  Coarse columnar grain;  Plane strain compression;  Recrystallisation

Publisher

Elsevier

ISSN

0921-5093

Publisher URL

http://dx.doi.org/10.1016/j.msea.2012.07.050

Copyright

Copyright © 2012 Elsevier B.V. All rights reserved.

Additional information

Supported by the Australian Research Council.

Peer reviewed