Deformation and fracture characteristics of ferrite/bainite dual-phase steels

Cai, Minghui, Ding, Hua, Zhang, Jiansu, Li, Long and Tang, Zhengyou 2009, Deformation and fracture characteristics of ferrite/bainite dual-phase steels, Cailiao yanjiu xuebao/Chinese journal of materials research, vol. 23, no. 1, pp. 83-88.

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Title Deformation and fracture characteristics of ferrite/bainite dual-phase steels
Author(s) Cai, Minghui
Ding, Hua
Zhang, Jiansu
Li, Long
Tang, Zhengyou
Journal name Cailiao yanjiu xuebao/Chinese journal of materials research
Volume number 23
Issue number 1
Start page 83
End page 88
Total pages 6
Publisher Zhongguo Kexueyuan Jinshu Yanjiusuo
Place of publication Shenyang, China
Publication date 2009-02
ISSN 1005-3093
Keyword(s) deformation behavior
ferrite/bainite dual-phase steel
fracture characteristics
metallic materials
uniaxial tension
Summary The deformation and fracture characteristics of a low carbon Si–Mn steel with ferrite/bainite dual–phase structure were investigated by thermo–mechanical controlled process (TMCP). The results showed that the curves of the instantaneous work–hardening factor n* value versus true strain ε are made up with three stages during uniform plastic deformation: n* value is relatively higher at stage I, decreases slowly with ε in stage II, and then decreases quickly with ε in stage III. Compared tothe equiaxed ferrite/bainite dual–phase steel, the quasi–polygonal ferrite/bainite dual–phase steel shows higher tensile strength and n*value in the low strain region. The voids or micro–cracks formed not only at ferrite–bainite interfaces but also within ferrite grains in the necked region, which can improve the property of resistance to crack propagation by reducing local stress concentration of the crack tips.
Language eng
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
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Document type: Journal Article
Collections: Institute for Frontier Materials
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