Non-Steady Equilibrium during Pro-Eutectoid Ferrite Formation in Fe-0.2C Alloy
Non-Steady Equilibrium during Pro-Eutectoid Ferrite Formation in Fe-0.2C Alloy作者机构：Shanghai Institute of Technology Shanghai Jiaotong University
出 版 物：《Journal of Iron and Steel Research International》 (国际钢铁研究杂志)
年 卷 期：2002年第9卷第2期
页 面：28-32页
核心收录：
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：Item Sponsored by National Natural Science Foundation of China(50075053)
主 题：duplex microstructure grain boundary allotriomorphic ferrite granular bainite high strength steel weldability
摘 要：As rolled microstructure and mechanical properties of a new kind of grain boundary allotriomorphic ferrite/granular bainite duplex steel plate and its crack propagation behavior were investigated in comparison with simple granular bainitic steel plate. These new duplex plate steels possess better combination of strength and toughness than granular bainite plate steels under the conditions of conventional rolling and air cooling. The observation of fatigue crack propagation behaviors showed that the existence of proper grain boundary allotriomorphic ferrite increases the compatible deformation ability of duplex microstructure and leads to the formation of crack branching and curving route, and it has an evidently blunting effect on microcrack tip and results in higher impact toughness. In addition, the new duplex steel plate also has good weldability as hot rolled high strength low alloy structural steel.
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