| SiC／Al复合材料的微观结构对裂纹扩展的影响 |
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| 引用本文： | 金玲,潘家祯.SiC／Al复合材料的微观结构对裂纹扩展的影响[J].华东理工大学学报(自然科学版),1996,22(6):743-748. |
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| 作者姓名： | 金玲 潘家祯 |
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| 作者单位： | [1]上海化工高等专科学校 [2]华东理工大学化工机械研究所 |
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| 摘 要： | 借助高倍光学显微镜和扫描电子显微镜，研究了ＳｉＣ颗业体积分数分别为０．１和０．２的ＳｉＣ／Ａｌ复合材料单边缺口试样拉伸断裂过程中材料的微观结构对细观裂纹扩展的影响。结果表明：对复合材料中原有微缺口的敏感性，前者比后者高，导致产生断裂裂纹的细观裂纹的萌生，扩展行为不仅受宏观主应力的影响，而且受细观裂纹尖端前方的微观组织结构的控制。
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| 关 键 词： | 复合材料 微观结构 碳化硅 铝 裂纹扩展 |
Effects of Microstructure to Cracking and Propagating in SiC/Al Composite Material |
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| Jin Ling.Effects of Microstructure to Cracking and Propagating in SiC/Al Composite Material[J].Journal of East China University of Science and Technology,1996,22(6):743-748. |
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| Authors: | Jin Ling |
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| Abstract: | This paper investigates the effects of microstructures to the initiation and propagation of cracks in SiCparticle Al composite materials by optical microscope and scanning electron microscope,10% and 20% volume percentages SiC_p/Al composite are usedResults show that the 10% volume percentage SiC_p/Al is more sensitive to the micro-notch than the 20%one. The cracking and propagating behavior are not only affected by themacroscopic remote stresses, but also controlled by microstructures ahead of the crack. SiC particle defects can either prohibit crack propagation,or change the cracking path.Microstructural defects can increase crack growth rates,The propagation is non-uniform. |
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| Keywords: | composite materials SiC particle crack microstructure tensile test |
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