EFFECT OF FREQUENCY ON CYCLIC CREEP OF POLYCRYSTALLINE ALUMINUM AT ROOM-TEMPERATURE

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	EFFECT OF FREQUENCY ON CYCLIC CREEP OF POLYCRYSTALLINE ALUMINUM AT ROOM-TEMPERATURE
	Z. A. Yang ; Z. G. Wang
刊名	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
	1991
卷号	142 期号:1 页码:25-33
关键词	ambient-temperature oxide dispersion stress rupture copper behavior acceleration alloy
ISSN号	0921-5093
中文摘要	A study was made of the effect of cyclic frequencies from zero to 1 Hz on the cyclic creep behaviour with different extents of unloading in commercial purity aluminium. There exists an optimum frequency corresponding to the lowest steady state creep rate, the value of which exhibits the trend of decreasing with attenuating stress amplitude at a given cyclic peak stress. Both the cyclic frequency and the stress amplitude strongly affect the threshold stress for the transition from cyclic creep acceleration to retardation but do not change the average internal stress. Expression for the threshold stress were derived as a function of thermal activation parameters. When the value of V(c) is near that of V(s) (V(c) and V(s) are the apparent activation volume of cyclic and static creep, respectively) the threshold stress varies inversely as (V(c)/V(s)-1); otherwise, it is inversely proportional to 1-V(s)/V(c). The effect of grain size on cyclic creep is also discussed.
原文出处	://WOS:A1991GD45100003
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/39491]
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	Z. A. Yang,Z. G. Wang. EFFECT OF FREQUENCY ON CYCLIC CREEP OF POLYCRYSTALLINE ALUMINUM AT ROOM-TEMPERATURE[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,1991,142(1):25-33.
APA	Z. A. Yang,&Z. G. Wang.(1991).EFFECT OF FREQUENCY ON CYCLIC CREEP OF POLYCRYSTALLINE ALUMINUM AT ROOM-TEMPERATURE.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,142(1),25-33.
MLA	Z. A. Yang,et al."EFFECT OF FREQUENCY ON CYCLIC CREEP OF POLYCRYSTALLINE ALUMINUM AT ROOM-TEMPERATURE".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 142.1(1991):25-33.