The effect of particle shape on ductility of SiCp reinforced 6061 Al matrix composites

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	The effect of particle shape on ductility of SiCp reinforced 6061 Al matrix composites
	S. Y. Qin ; C. R. Chen ; G. D. Zhang ; W. L. Wang ; Z. G. Wang
刊名	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
	1999
卷号	272 期号:2 页码:363-370
关键词	metal matrix composite ductility particle shape finite element method thermal residual stress mechanical-properties fracture-toughness stress-strain particulate microstructure behavior deformation alloy size
ISSN号	0921-5093
中文摘要	To study the effect of particle shape on thermal residual stress and strain distributions in composites, five two-dimension SiCp/6061Al model composites reinforced with spherical, hexagon, square, triangle and shuttle-shaped particles, respectively were analyzed by finite element method (FEM). The results showed that the particle shape has a great effect on thermal residual stress and strain fields in composites. There are a residual plastic strain concentration in the matrix around a pointed particle corner and a serious residual stress concentration in the pointed particle corner. The two concentrations increase with decreasing pointed corner degree. When an external stress is applied, the plastic strain concentration in the matrix around the pointed particle corner and the serious stress concentration in the pointed particle corner which will fracture on a relative low level of applied stress can decrease ductility of the composite. Two 6061 aluminium alloy matrix composites reinforced with general SiC particles and blunted SiC particles were studied on the basis of the FEM analyses. It was found that most very pointed particle corners are eliminated after SiC particles being blunted. Replacing general SiC particles with blunted ones can reduce residual plastic strain concentrations in the matrix and serious residual stress concentration in the particle. Therefore, blunted SiC particles reinforced composite shows a higher ductility than general one. (C) 1999 Elsevier Science S.A. All rights reserved.
原文出处	://WOS:000083785900016
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/37476]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	S. Y. Qin,C. R. Chen,G. D. Zhang,et al. The effect of particle shape on ductility of SiCp reinforced 6061 Al matrix composites[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,1999,272(2):363-370.
APA	S. Y. Qin,C. R. Chen,G. D. Zhang,W. L. Wang,&Z. G. Wang.(1999).The effect of particle shape on ductility of SiCp reinforced 6061 Al matrix composites.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,272(2),363-370.
MLA	S. Y. Qin,et al."The effect of particle shape on ductility of SiCp reinforced 6061 Al matrix composites".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 272.2(1999):363-370.