X80管线钢中M/A岛的EBSD结构表征

EBSD characterization on the structure of M/A islands of X80 pipeline steel

借助电子背散射衍射(EBSD)技术研究了X80管线钢中M/A岛的微观结构。结果表明,M/A岛的微观结构存在着三种组成形式,可以是单独的马氏体相,奥氏体相,以及马氏体与奥氏体的混合相,不同的组成形式对钢的韧性有着较大的影响。

M/A islands of X80 pipeline steel were studied by means of electron back-scatter diffraction （EBSD）. The results show that thephase structure of M/A islands have 3 forms： single phase of martensite, phase of austenite , and mixed martensite and austenite phase. The form of M/A islands has a great impact on the toughness of pipeline steel.