Creep behavior of mullite short fiber reinforced ZL109 alloy composites at high temperature

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	Creep behavior of mullite short fiber reinforced ZL109 alloy composites at high temperature; Creep behavior of mullite short fiber reinforced ZL109 alloy composites at high temperature
	S. L. Wang; B. L. Shen; S. J. Gao; D. Li; M. J. Tu; W. C. Yu; G. Yao
	2001 ; 2001
发表期刊	Journal of Materials Science & Technology ; Journal of Materials Science & Technology
ISSN	1005-0302 ; 1005-0302
卷号	17 期号:4 页码:429-432
摘要	The creep behavior of Al2O3. SiO2 fiber reinforced ZL109 composites has been investigated at four temperatures ranging from 553 to 623 K. The results show high stress exponent and high apparent creep activation energy. A good correlation between the normalized creep rate and normalized effective stress means that the true stress exponent of minimum creep strain rate of the composite is very close to 5, and the minimum creep strain rate is matrix lattice diffusion controlled. The threshold stress decreases with increasing temperature linearly and disappears at a temperature close to 623 K. It is assumed that the long range internal back stresses generated in creep reduce the load transfer to fibers and the interaction between dislocations and strengthening precipitates decreases at high temperature. At a high temperature where the long range internal back stresses is very close to the applied stress, the threshold stress disappears.; The creep behavior of Al2O3. SiO2 fiber reinforced ZL109 composites has been investigated at four temperatures ranging from 553 to 623 K. The results show high stress exponent and high apparent creep activation energy. A good correlation between the normalized creep rate and normalized effective stress means that the true stress exponent of minimum creep strain rate of the composite is very close to 5, and the minimum creep strain rate is matrix lattice diffusion controlled. The threshold stress decreases with increasing temperature linearly and disappears at a temperature close to 623 K. It is assumed that the long range internal back stresses generated in creep reduce the load transfer to fibers and the interaction between dislocations and strengthening precipitates decreases at high temperature. At a high temperature where the long range internal back stresses is very close to the applied stress, the threshold stress disappears.
部门归属	chinese acad sci, state key lab fatigue & fracture mat, inst met res, shenyang 110016, peoples r china.;wang, sl (reprint author), chinese acad sci, state key lab fatigue & fracture mat, inst met res, shenyang 110016, peoples r china ; chinese acad sci, state key lab fatigue & fracture mat, inst met res, shenyang 110016, peoples r china.;wang, sl (reprint author), chinese acad sci, state key lab fatigue & fracture mat, inst met res, shenyang 110016, peoples r china
关键词	Metal-matrix Composites Metal-matrix Composites Solid-solution Solid-solution Aluminum Aluminum Stress Stress
URL	查看原文 ; 查看原文
WOS记录号	WOS:000170191000009 ; WOS:000170191000009
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/321006/36830
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. L. Wang,B. L. Shen,S. J. Gao,et al. Creep behavior of mullite short fiber reinforced ZL109 alloy composites at high temperature, Creep behavior of mullite short fiber reinforced ZL109 alloy composites at high temperature[J]. Journal of Materials Science & Technology, Journal of Materials Science & Technology,2001, 2001,17, 17(4):429-432, 429-432.
APA	S. L. Wang.,B. L. Shen.,S. J. Gao.,D. Li.,M. J. Tu.,...&G. Yao.(2001).Creep behavior of mullite short fiber reinforced ZL109 alloy composites at high temperature.Journal of Materials Science & Technology,17(4),429-432.
MLA	S. L. Wang,et al."Creep behavior of mullite short fiber reinforced ZL109 alloy composites at high temperature".Journal of Materials Science & Technology 17.4(2001):429-432.