High temperature creep deformation of an Al-Fe-V-Si alloy

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	High temperature creep deformation of an Al-Fe-V-Si alloy
	L. M. Peng ; S. J. Zhu ; Z. Y. Ma ; J. Bi ; H. R. Chen ; F. G. Wang
刊名	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
	1999
卷号	259 期号:1 页码:25-33
关键词	dispersion-strengthened aluminum alloys creep stress exponent activation energy threshold stress dislocation detachment relaxation parameter dislocation climb matrix composites powder-metallurgy threshold stress behavior aluminum particles strength model
ISSN号	0921-5093
中文摘要	The creep behavior of dispersion-strengthened Al-8.5Fe-1.3V-1.7Si (8009 Al) has been investigated in the temperature range of 573-723 K. The results exhibit a high apparent stress exponent (14-18) and a high apparent activation energy for creep (296 kJ mol(-1)). The creep data were analyzed by incorporating a threshold stress into the power-law creep equation, which leads to a stress exponent of 5 indicating dislocation-climb mechanism. Traditional dislocation creep theories neither lead to correct values nor explain the origin or temperature dependence of the threshold stress, which is much stronger than that attributable to the shear modulus. A good correlation between experimental and theoretical prediction using the dislocation detachment model was obtained by adjusting the structure factor in the creep equation because the dislocation density is not well known. Dislocation/particle interactions as well as dislocation networks and subgrains are frequently observed after creep tests at different conditions. (C) 1999 Elsevier Science S.A. All rights reserved.
原文出处	://WOS:000078049400004
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/37468]
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	L. M. Peng,S. J. Zhu,Z. Y. Ma,et al. High temperature creep deformation of an Al-Fe-V-Si alloy[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,1999,259(1):25-33.
APA	L. M. Peng,S. J. Zhu,Z. Y. Ma,J. Bi,H. R. Chen,&F. G. Wang.(1999).High temperature creep deformation of an Al-Fe-V-Si alloy.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,259(1),25-33.
MLA	L. M. Peng,et al."High temperature creep deformation of an Al-Fe-V-Si alloy".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 259.1(1999):25-33.