The effect of heat treatment on tensile properties of the cold-compacted nano crystalline Al

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	The effect of heat treatment on tensile properties of the cold-compacted nano crystalline Al
	X. K. Sun; H. T. Cong; M. Sun; M. C. Yang
	1999
发表期刊	Nanostructured Materials
ISSN	0965-9773
卷号	11 期号:7 页码:917-923
摘要	The present work studied the effect of heat treatment on tensile properties of bulk nanocrystalline Al (nano-Al) cold-compacted from nano-Al powder. The nano-Al powder synthesized by the active H plasma evaporation was compacted under 1.42 GPa pressure at room temperature into disks with 25 mm diameter and 2 mm thickness. The cold-compacted disks were heat-treated at temperature range from 540 degrees C to 635 degrees C, then machined into the tensile specimens with 25 mm total length. The results indicated that the grain size of the cold-compacted nano-Al heat-heated at 635 degrees C is basically consistent with the primary powder. The tensile specimens heat-treated at temperatures lower than 600 degrees C are broken prematurely in the elastic deformation region during the tensile test process with a brittle intergranular fracture. The specimens heat-treated at temperatures higher than 600 degrees C give the complete stress-strain curves, the yield strengths sigma(0.2) and tensile strengths sigma(b) are 12-16 times and 5-6 times those of annealed coarse-grained Al respectively, the elongations-to-failure are all 4%, and the mechanism of failure is transgranular shear fracture with a ductile dimples fracture. (C) 1999 Acta Metallurgica Inc.
部门归属	chinese acad sci, inst met res, state key lab rsa, shenyang 110015, peoples r china. china med univ, dept phys, shenyang 110001, peoples r china.;sun, xk (reprint author), chinese acad sci, inst met res, state key lab rsa, 72 wenhua rd, shenyang 110015, peoples r china
关键词	Nanocrystalline Aluminum Mechanical-properties Melting Behavior Grain-size Palladium
URL	查看原文
WOS记录号	WOS:000084281300012
引用统计	被引频次：19[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/321006/37497
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. K. Sun,H. T. Cong,M. Sun,et al. The effect of heat treatment on tensile properties of the cold-compacted nano crystalline Al[J]. Nanostructured Materials,1999,11(7):917-923.
APA	X. K. Sun,H. T. Cong,M. Sun,&M. C. Yang.(1999).The effect of heat treatment on tensile properties of the cold-compacted nano crystalline Al.Nanostructured Materials,11(7),917-923.
MLA	X. K. Sun,et al."The effect of heat treatment on tensile properties of the cold-compacted nano crystalline Al".Nanostructured Materials 11.7(1999):917-923.