| 系列示波冲击断口三维形貌几何特征和断裂性能 |
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| 引用本文： | 朱平,陈丙森. 系列示波冲击断口三维形貌几何特征和断裂性能[J]. 金属学报, 1998, 34(1): 63-69 |
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| 作者姓名： | 朱平 陈丙森 |
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| 作者单位： | 清华大学机械工程系!北京，100084，清华大学机械工程系!北京，100084 |
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| 基金项目： | 国家自然科学基金!59375224 |
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| 摘 要： | 应用示波冲击试验技术测量了Ｐ４６０ＮＬ１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。
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| 关 键 词： | 示波冲击 三维形貌 断裂性能 焊接结构钢 |
| 收稿时间： | 1998-01-18 |
| 修稿时间： | 1998-01-18 |
3D TOPOGRAPHY OF FRACTURED SURFACES AND MECHANICAL PROPERTIES UNDER INSTRUMENTED IMPACT LOADING |
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| ZHU Ping,CHEN Bingsen. 3D TOPOGRAPHY OF FRACTURED SURFACES AND MECHANICAL PROPERTIES UNDER INSTRUMENTED IMPACT LOADING[J]. Acta Metallurgica Sinica, 1998, 34(1): 63-69 |
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| Authors: | ZHU Ping CHEN Bingsen |
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| Affiliation: | ZHU Ping,CHEN Bingsen (Department of Mechanical Engineering,Tsinghua University,Beijing ) |
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| Abstract: | 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. |
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| Keywords: | quantitative fractography instrumented impact test 3D topography roughness fractal fracture property |
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