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Feasibility study of partial recrystallisation in multi-pass hot deformation process and application to calculation of mean flow stress

Choi, Sangwoo, Lee, Youngseog, Hodgson, Peter and Woo, Jong Soo 2002, Feasibility study of partial recrystallisation in multi-pass hot deformation process and application to calculation of mean flow stress, Journal of materials processing technology, vol. 125, no. 126, pp. 63-71, doi: 10.1016/S0924-0136(02)00286-8.

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Title Feasibility study of partial recrystallisation in multi-pass hot deformation process and application to calculation of mean flow stress
Author(s) Choi, Sangwoo
Lee, Youngseog
Hodgson, Peter
Woo, Jong Soo
Journal name Journal of materials processing technology
Volume number 125
Issue number 126
Start page 63
End page 71
Publisher Elsevier Science BV
Place of publication Amsterdam, Netherlands
Publication date 2002-09-09
ISSN 0924-0136
1873-4774
Keyword(s) modelling
numerical simulation
partial recrystallisation
recrystallised fraction
mean flow stress
Summary A feasibility study for handling the partial recrystallisation in multi-pass hot deformation where the heterogeneity of microstructure of deformed austenite is inherently accompanied is presented. The proposed model is based on modification of the conventional model in which the microstructure of deformed austenite at each pass is simply taken as being homogeneous during the multi-pass deformation. The usefulness of the modified model has been demonstrated by applying it to a four-pass oval–round (or round–oval) rod rolling sequence. The recrystallised fraction, austenite grain size (AGS) and mean flow stress at each pass computed from the modified model has been compared with those from the conventional model. The result showed that the recrystallisation behaviour and evolution of AGS at a given pass were dependent on the modelling method of the partial recrystallisation in the multi-pass rolling for the case studied. As the rolling speed increased, the difference between the mean flow stresses calculated by the conventional model and the proposed model was gradually larger in accordance with the contribution of partial recrystallisation.
Language eng
DOI 10.1016/S0924-0136(02)00286-8
Field of Research 091207 Metals and Alloy Materials
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2002, Elsevier Science B.V
Persistent URL http://hdl.handle.net/10536/DRO/DU:30008549

Document type: Journal Article
Collection: School of Engineering and Technology
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