| 基于声发射技术的30CrMnSi钢断裂机理研究 |
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| 引用本文： | 龙宪海,阳能军,王汉功.基于声发射技术的30CrMnSi钢断裂机理研究[J].材料工程,2011(1):17-22. |
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| 作者姓名： | 龙宪海 阳能军 王汉功 |
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| 作者单位： | 第二炮兵工程学院,西安,710025 |
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| 摘 要： | 采用三点弯曲试样加载过程声发射监测实验,结合断口SEM观察及X射线能谱分析,考察了30CrMnSi合金钢延性断裂的整个物理过程.结果表明:30CrMnSi钢的断裂过程从宏观上可以分为裂尖塑性变形、裂纹亚临界扩展和裂纹失稳扩展三个阶段.其机理如下:裂尖塑性变形过程是位错的滑移、堆积而引起的孔洞形核和长大;裂纹亚临界扩展过...
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| 关 键 词： | 高强度合金钢 声发射 断裂机理 断裂韧度 |
Fracture Mechanism for 30CrMnSi Steel Based on Acoustic Emission Technology |
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| LONG Xian-hai,YANG Neng-jun,WANG Han-gong.Fracture Mechanism for 30CrMnSi Steel Based on Acoustic Emission Technology[J].Journal of Materials Engineering,2011(1):17-22. |
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| Authors: | LONG Xian-hai YANG Neng-jun WANG Han-gong |
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| Affiliation: | LONG Xian-hai,YANG Neng-jun,WANG Han-gong(The Second Artillery Engineering College,Xi'an 710025,China) |
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| Abstract: | The whole physics process of ductile fracture in 30CrMnSi steel was investigated by the experiment of three-point bending specimen,which was monitored by acoustic emission system and the analysis of fracture by SEM and X-ray spectrometer.The results indicate that the whole process of the fracture includes there stages: the plastic deformation of crack tip,the crack pre-critical propagation and the crack critical propagation.The process of plastic deformation of crack tip is the formation and growth of cavit... |
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| Keywords: | high strength steel acoustic emission fracture mechanism fracture toughness |
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