Microstructure and texture evolution during tensile deformation of symmetric/asymmetric-rolled low carbon microalloyed steel

Cai, Minghui, Wei, Xing, Rolfe, Bernard and Hodgson, Peter D. 2015, Microstructure and texture evolution during tensile deformation of symmetric/asymmetric-rolled low carbon microalloyed steel, Materials science and engineering A, vol. 641, pp. 297-304, doi: 10.1016/j.msea.2015.06.062.

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Title Microstructure and texture evolution during tensile deformation of symmetric/asymmetric-rolled low carbon microalloyed steel
Author(s) Cai, Minghui
Wei, Xing
Rolfe, BernardORCID iD for Rolfe, Bernard orcid.org/0000-0001-8516-6170
Hodgson, Peter D.
Journal name Materials science and engineering A
Volume number 641
Start page 297
End page 304
Total pages 8
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2015-08-12
ISSN 0921-5093
Keyword(s) Asymmetric rolling
Deformation behavior
Fracture mechanism
Gradient structure
Micromechanical modeling
Ultrafine ferrite
Summary The deformation and fracture mechanisms of a low carbon microalloyed steel processed by asymmetric rolling (AsR) and symmetric rolling (SR) were compared by microstructural and texture evolutions during uniaxial tensile deformation. A realistic microstructure-based micromechanical modeling was involved as well. AsR provides more effective grain refinement and beneficial shear textures, leading to higher ductility and extraordinary strain hardening with improved yield and ultimate tensile stresses as well as promoting the occurrence of ductile fracture. This was verified and further explained by means of the different fracture modes during quasi-static uniaxial deformation, the preferred void nucleation sites and crack propagation behavior, and the change in the dislocation density based on the kernel average misorientation (KAM) distribution. The equivalent strain/stress partitioning during tensile deformation of AsR and SR specimens was modeled based on a two-dimensional (2D) representative volume element (RVE) approach. The trend of strain/stress partitioning in the ferrite matrix agrees well with the experimental results.
Language eng
DOI 10.1016/j.msea.2015.06.062
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 861205 Sheet Metal Products
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30074735

Document type: Journal Article
Collections: Institute for Frontier Materials
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