Microstructures and fracture features of cold-rolled low carbon steel sheet after annealing and mechanical stress concurrently loaded

被引:7
作者
Yang, Kun [1 ]
Gou, Huiyang [1 ]
Zhang, Bo [1 ]
Huang, Rui [1 ]
Li, Hui [1 ]
Lu, Manman [1 ]
Zhang, Xiangyi [1 ]
Zhang, Jingwu [1 ]
机构
[1] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Coll Mat Sci & Engn, Qinhuangdao 066004, Peoples R China
来源
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2009年 / 502卷 / 1-2期
基金
中国国家自然科学基金;
关键词
Cold-rolled low carbon steel; Anneal; Mechanical stress; Commixed grain structure; Delamination crack; RECRYSTALLIZATION BEHAVIOR; ENHANCED TRANSFORMATION; DEFORMATION; FERRITE;
D O I
10.1016/j.msea.2008.10.006
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The microstructure and fracture feature of a cold-rolled low carbon steel sheet after annealing under a stress were investigated by using the optical microscope (OM), scanning-electron microscopy (SEM) and transmission electron microscopy (TEM). It was found that a commixed grain structure was formed when concurrently stressed and annealed at 650 degrees C, and that both the tensile strength and hardness of the steel are still higher while the elongation is increased markedly. The dimple like fracture feature with delamination cracks was observed after tensile deformation. These superior mechanical properties were derived from the commixed grain structure composing of cold-rolled lamellar grains, fine equiaxed grains, and sub-grains as well as ultrafine carbide precipitates. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码:126 / 130
页数:5
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