系列示波冲击断口三维形貌几何特征和断裂性能  

3D TOPOGRAPHY OF FRACTURED SURFACES AND MECHANICAL PROPERTIES UNDER INSTRUMENTED IMPACT LOADING

作　　者：朱平[1] 陈丙森[1] 

机构地区：[1]清华大学机械工程系,北京100084

出　　处：《金属学报》1998年第1期63-69,共7页Acta Metallurgica Sinica

基　　金：国家自然科学基金!59375224

摘　　要：应用示波冲击试验技术测量了P460NLl钢不同温度系列下的动态断裂性能.利用扫描电镜立体对技术、图像处理与分析和计算机视觉方法对示波冲击断口形貌进行了三维重建和定量分析结果表明，断口三维粗糙度指数Rs，Rq和Rmax与示波冲击裂纹扩展功有很好的对应关系，显示了它们良好的应用前景断面虽然表现出分形行为。The dynamic fracture properties of P460NLl steel were tested under instrumented impact loading at different test temperatures. The 3D topography of fractured surfaces was reconstructed and quantified by the means of SEM stereo pairs, image processing and analysis, and computer vision. It was shown that measured 3D roughness indexes Rs, Rq and Rmax have good positive relations to the crack propagation part of absorbed impact energy. Although fractal behavior had been checked out on the fractured surfaces, the fractal dimension was found nonsensitive to the fracture mode and mechanical properties. The geometric characteristics of fractal fractured surfaces should be quantified in fractal dimension together with absolute parameters.

关 键 词：示波冲击 三维形貌 断裂性能 焊接结构钢 

分 类 号：TG142.41[一般工业技术—材料科学与工程] TG111.91[金属学及工艺—金属材料]