Low cycle fatigue of SiCp reinforced AA2009 composites

IMR OpenIR

	Low cycle fatigue of SiCp reinforced AA2009 composites
	M. J. Luk; F. A. Mirza; D. L. Chen; D. R. Ni; B. L. Xiao; Z. Y. Ma
	2015
发表期刊	Materials & Design
ISSN	0261-3069
卷号	66 页码:274-283
摘要	Strain-controlled low cycle fatigue (LCF) characteristics of an extruded Al-Cu-Mg aluminum alloy reinforced with SiC particles (SiCp/AA2009 composite) in the T4 and T6 heat treatment conditions were investigated. In comparison with the T6 condition with Al2CuMg precipitates, the composite in the T4 condition had a higher ductility and equivalent ultimate tensile strength despite a lower yield strength, leading to a higher strain hardening exponent and hardening capacity. Unlike the extruded magnesium alloys, the SiCp/AA2009 composite exhibited symmetrical hysteresis loops in tension and compression due to the dislocation slip-dominated deformation in the aluminum matrix. Cyclic hardening occurred at higher strain amplitudes with a more pronounced hardening in the T4 condition, and cyclic stabilization remained at lower strain amplitudes (0.1-0.3%). Fatigue life in both conditions was equivalent, which can be well described by the Coffin-Manson law and Basquin's equation. Strain ratio significantly affected cyclic deformation characteristics of the composites in both conditions, with a large amount of plastic deformation observed in the tensile phase of the first cycle of hysteresis loops at zero or positive strain ratios. A mean stress relaxation was observed. Fatigue crack was observed to initiate from the specimen surface and crack propagation was characterized predominantly by particle cracking along with debonding. (C) 2014 Elsevier Ltd. All rights reserved.
部门归属	[luk, m. j. ; mirza, f. a. ; chen, d. l.] ryerson univ, dept mech & ind engn, toronto, on m5b 2k3, canada. [ni, d. r. ; xiao, b. l. ; ma, z. y.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; chen, dl (reprint author), ryerson univ, dept mech & ind engn, 350 victoria st, toronto, on m5b 2k3, canada. ; dchen@ryerson.ca ; zyma@imr.ac.cn
关键词	Metal-matrix Composites Low Cycle Fatigue Cyclic Deformation Strain Ratio Mean Stress Extruded Magnesium Alloy Metal-matrix Composites Strain-hardening Behavior Aluminum-alloy Fracture-behavior Mechanical-properties Silicon-carbide Microstructural Evolution Deformation-behavior Climate-change
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73331
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	M. J. Luk,F. A. Mirza,D. L. Chen,et al. Low cycle fatigue of SiCp reinforced AA2009 composites[J]. Materials & Design,2015,66:274-283.
APA	M. J. Luk,F. A. Mirza,D. L. Chen,D. R. Ni,B. L. Xiao,&Z. Y. Ma.(2015).Low cycle fatigue of SiCp reinforced AA2009 composites.Materials & Design,66,274-283.
MLA	M. J. Luk,et al."Low cycle fatigue of SiCp reinforced AA2009 composites".Materials & Design 66(2015):274-283.