Static and cyclic creep behaviour of SiC whisker reinforced aluminium composite

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	Static and cyclic creep behaviour of SiC whisker reinforced aluminium composite
	S. C. Tjong; Z. Y. Ma; Z. G. Wang
	1999
发表期刊	Materials Science and Technology
ISSN	0267-0836
卷号	15 期号:6 页码:666-672
摘要	Static and cyclic creep tests were carried out in tension at 573-673 K on a 20 vol.-%SiC whisker reinforced aluminium (Al/SiCw) composite. The Al/SiCw composite exhibited an appaient str ess exponent of 18.1-19.0 at 573-673 K and an apparent activation energy of 325 kJ mol(-1) for static creep, whereas an apparent stress exponent of 19.6 at 623 K and an apparent activation energy of 376 kJ mol(-1) were observed for cyclic creep. A cyclic creep retardation (CCR) behaviour was observed for the Al/SiCw composite. The steady state creep rate for cyclic creep was three orders of magnitude lower than that for. static creep. Furthermore, the steady state creep I rates of the composite tended to clear ease continuously with increasing percentage unloading amount. The static creep data of the Al/SiCw coinposite were rationalised by the substructure invariant model with a true stress exponent of 8 together with a threshold stress. The CCR behaviour can be explained by the storage of anelastic strain delaying non-recoverable creep during the onload cycles.
部门归属	city univ hong kong, dept phys & mat sci, kowloon, hong kong. chinese acad sci, inst met res, state key lab fatigue & fracture mat, shenyang, peoples r china.;tjong, sc (reprint author), city univ hong kong, dept phys & mat sci, 83 tat chee ave, kowloon, hong kong
关键词	High-temperature Creep Matrix Composites Al Composite Stress Alloy Microstructure Rupture
URL	查看原文
WOS记录号	WOS:000081278600009
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/37511
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. C. Tjong,Z. Y. Ma,Z. G. Wang. Static and cyclic creep behaviour of SiC whisker reinforced aluminium composite[J]. Materials Science and Technology,1999,15(6):666-672.
APA	S. C. Tjong,Z. Y. Ma,&Z. G. Wang.(1999).Static and cyclic creep behaviour of SiC whisker reinforced aluminium composite.Materials Science and Technology,15(6),666-672.
MLA	S. C. Tjong,et al."Static and cyclic creep behaviour of SiC whisker reinforced aluminium composite".Materials Science and Technology 15.6(1999):666-672.