不同应力状态下45钢断口形貌分析  

Fracture topography analysis of C45 steel under different stress state

作　　者：吴彦骏[1,2] 庄新村[3] 赵震[3] 

机构地区：[1]宝山钢铁股份有限公司研究院,上海201900 [2]汽车用钢开发与应用技术国家重点实验室(宝钢),上海201900 [3]上海交通大学塑性成形技术与装备研究院,上海200030

出　　处：《塑性工程学报》2013年第3期106-110,共5页Journal of Plasticity Engineering

摘　　要：与传统的宏观断裂力学不同,细观损伤力学侧重于研究材料内细观损伤的演化对于材料宏观断裂的影响。该文以完全球化退火处理的45钢为对象,对设计的不同几何形状试件进行拉伸、压缩、扭转和精密冲裁试验,以获得不同应力三轴度条件下的断口形貌;通过数值模拟,并结合扫描电镜对不同应力状态下发生损伤和断裂的机理进行分析。Comparing with the traditional macro-scale fracture mechanics, meso-scale mechanics focus on researching the effect of the inner damage evolution on the macro fracture of material. In this study, specimens of different geometry were designed with C45 steel, and used to perform tensile, compression, torsion and fine-blanking test as well, so as to obtain the fracture topogra phy under different stress triaxiality. With the aid of numerical simulation and SEM, the mechanism of damage and ductile frac rare in different stress state was investigated.

关 键 词：细观损伤 应力三轴度 断口形貌 

分 类 号：TG115.5[金属学及工艺—物理冶金]