摘要
采用自制平面应力拉伸装置,通过扫描电镜,透射电子显微镜等分析测试方法对15CrMnMoV钢的淬火-回火组织和淬火-冷轧组织的断裂行为进行了研究。实验结果表明:具有冷轧组织试样的断裂阻力明显高于原始组织试样。利用复型的方法精确测定出裂纹长度,并计算得出能量释放率D-△a的关系曲线,轧制试样在△a=40μm时出现峰值,显微组织分析表明峰值产生的原因是弱界面开裂的结果。
Planar stress tensile equipment made by myself is applied. The .crack propagation of tempered and coldrolled microstructure of 15CrMnMoV steel is studied by SEM and TEM etc. The results show： the crack resistance of the cold-rolled specimens is higher than that of the original specimens. The crack lengths are measured accurately by complex method, and the relationships of D-△a are plotted. The peak appear at the curve of the cold-rolled （△a =40 um） due to fracture of weak interface.
出处
《物理测试》
CAS
2008年第5期9-11,16,共4页
Physics Examination and Testing
