Effect of temperature on mechanical behaviour of high manganese TWIP steel

Shterner, Vadim, Timokhina, Ilana, Beladi, Hossein and Hodgson, Peter 2014, Effect of temperature on mechanical behaviour of high manganese TWIP steel, Materials science forum, vol. 773-774, pp. 257-262, doi: 10.4028/www.scientific.net/MSF.773-774.257.

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Title Effect of temperature on mechanical behaviour of high manganese TWIP steel
Author(s) Shterner, Vadim
Timokhina, IlanaORCID iD for Timokhina, Ilana orcid.org/0000-0003-1989-0835
Beladi, HosseinORCID iD for Beladi, Hossein orcid.org/0000-0003-0131-707X
Hodgson, Peter
Journal name Materials science forum
Volume number 773-774
Start page 257
End page 262
Total pages 6
Publisher Trans Tech Publications
Place of publication Zurich, Switzerland
Publication date 2014
ISSN 0255-5476
Keyword(s) Deformation mechanism
Deformation temperature
Mechanical twinning
TWIP steel
Summary The aim of the present study was to investigate the role of deformation temperature on the active deformation mechanisms in a 0.6C-18Mn-1.5Al (wt%) TWIP steel. The tensile testing was performed at different temperatures, ranging from ambient to 400°C at a constant strain rate of 10-3 S-1. The microstructure characterization was carried out using a scanning electron microscopy. The deformation temperature revealed a significant effect on the active deformation mechanisms (i.e. slip versus twinning), resulting in different microstructure evolution and mechanical properties. At the room temperature, the mechanical twinning was the dominant deformation mechanism, enhancing both the strength and ductility. Dynamic strain aging (DSA) effect was observed at different deformation temperatures, though it was more pronounced at higher temperatures. The volume fraction of deformation twins significantly reduced with an increase in the deformation temperature, deteriorating the mechanical behavior. There was a transition temperature (~300°C), above which the mechanical twinning was hardly observed in the microstructure even at fracture, resulting in low ductility and strength. The current observation can be explained through the change in the stacking fault energy with the deformation temperature. © (2014) Trans Tech Publications, Switzerland.
Language eng
DOI 10.4028/www.scientific.net/MSF.773-774.257
Field of Research 091299 Materials Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, Trans Tech Publications
Persistent URL http://hdl.handle.net/10536/DRO/DU:30070099

Document type: Journal Article
Collections: Institute for Frontier Materials
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