金光灿,罗一平,李锦

• 1:上海工程技术大学汽车工程学院

摘要(Abstract)：

利用透射电镜和EBSD技术对拉伸过程中800 MPa热镀锌双相钢的微观变形行为进行了研究,主要分析了不同变形量下的形变位错组态、铁素体形貌、马氏体形貌、铁素体晶粒尺寸和微观晶粒取向。研究结果表明:随着变形量的增加,铁素体晶粒内位错密度不断增加,进而产生缠结并形成位错胞;此后随着变形量的继续增大,位错胞数量增多,尺寸变小。随着变形量的增加,铁素体晶粒尺寸不断变小,当变形量为11%时,铁素体晶粒不再是规则的等轴形状,大部分的晶粒尺寸不到1μm;拉伸过程中,越来越多的位错塞积将大的铁素体晶粒分割成许多小尺寸的位错胞,导致大角度晶界比例下降,小角度晶界比例上升。

关键词(KeyWords)： 冷轧热镀锌双相钢;微观变形;位错;位错胞

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 金光灿,罗一平,李锦

DOI: 10.13289/j.issn.1009-6264.2015.09.025

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