%0 Journal Article
%T Deformation and fracture characteristics of ferrite/bainite dual-phase steels<br>铁素体/贝氏体双相钢的变形和断裂特性
%A CAI Minghui~ DING Hua~ ZHANG Jiansu~ LI Long~ TANG Zhengyou~ School of Materials
%A Metallurgy
%A Northeastern University
%A Shenyang Technology Center
%A Baoshan Iron & Steel Group Co
%A Shanghai National Institute for Materials Science
%A Japan
%A Tsukuba -
%A <br>蔡明晖
%A 丁桦
%A 张建苏
%A 李龙
%A 唐正友
%J 材料研究学报
%D 2009
%I 
%X 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.
%K metallic materials
%K ferrite/bainite dual--phase steel
%K uniaxial tension
%K deformation behavior
%K fracture characteristics<br>金属材料
%K 铁素体/贝氏体双相钢
%K 单轴拉伸
%K 变形行为
%K 断裂特性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=C101C4C04993B4D94FCD8446E6CBEB3B&aid=6872E577FAA4AD973CEF9100204ABFF6&yid=DE12191FBD62783C&vid=EA389574707BDED3&iid=CA4FD0336C81A37A&sid=06EA2770E96C5402&eid=7E8E8B150580E4AB&journal_id=1005-3093&journal_name=材料研究学报&referenced_num=0&reference_num=15