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
	1999
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	259 期号:1 页码:25-33
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.
部门归属	dalian univ technol, dept mat engn, dalian 116023, peoples r china. acad sinica, inst met res, shenyang 110015, peoples r china.;zhu, sj (reprint author), dalian univ technol, dept mat engn, dalian 116023, peoples r china;zhu@mce.uec.ac.jp
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
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WOS记录号	WOS:000078049400004
引用统计	被引频次：29[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/321006/37468
专题	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.