摘要
15Cr Mn Mo V钢冷轧—时效后 ,钢中存在大量弱界面 ,力学性能有明显提高。应用 TEM原位拉伸方法 ,对 1 5Cr Mn Mo V钢中弱界面的开裂进行了原位观察及扫描电镜断口分析。结果表明 :弱界面有阻碍位错运动、偏转主裂纹扩展方向的作用 ,可形成分层断口。这种断裂方式使断口表面积增加 ,提高了材料的强韧性。
There are many weak interfaces when 15CrMnMoV steel is cold and rolled the mechanical properties are increased greatly Fracture of weak interface has been investigated by in situ transmission electron microscope (TEM) tensile test and SEM analyzed for 15CrMnMoV steel The result showed that the weak interface blocks the motion of the dislocations and changes the propagation direction of the main crack,and results in forming lamella fracture surface Such fracture leads to the increase of fracture area and toughness of the steel
出处
《钢铁》
CAS
CSCD
北大核心
2000年第10期55-58,71,共5页
Iron and Steel
基金
国家自然科学基金!资助项目 ( 596810 0 6)
