Enhanced fracture toughness and strength in bulk nanocrystalline Cu with nanoscale twin bundles

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	Enhanced fracture toughness and strength in bulk nanocrystalline Cu with nanoscale twin bundles
	E. W. Qin; L. Lu; N. R. Tao; J. Tan; K. Lu
	2009
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	57 期号:20 页码:6215-6225
摘要	Bulk nanocrystalline pure Cu samples with embedded nanoscale twin bundles were prepared by means of dynamic plastic deformation (DPD) at cryogenic temperature. By adjusting the DPD parameters, we increased the volume fraction of nanotwin bundles, resulting in an increase in both tensile strength and fracture toughness. The enhanced strength is attributed to the strengthening effect of the nanotwin bundles. The highly anisotropic nanotwin lamellar structures are found to be effective in energy absorption and arresting crack propagation during fracture. Coarse and deep dimples associated with obvious recrystallization underneath were detected in the fracture surfaces, owing to the presence of the nanotwin bundles. The enhancement of fracture toughness is closely correlated with the formation of these deep dimples. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	[qin, e. w.; lu, l.; tao, n. r.; tan, j.; lu, k.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;lu, l (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;llu@imr.ac.cn
关键词	Fracture Toughness Nanostructures Nanoscale Twins Dynamic Plastic Deformation Recrystallization Dynamic Plastic-deformation Microstructural Evolution Mechanical-properties Nanostructured Metal Tensile Deformation Grain-growth Copper Behavior Ductility Nickel
URL	查看原文
WOS记录号	WOS:000272111800025
引用统计	被引频次：116[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/321006/32242
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	E. W. Qin,L. Lu,N. R. Tao,et al. Enhanced fracture toughness and strength in bulk nanocrystalline Cu with nanoscale twin bundles[J]. Acta Materialia,2009,57(20):6215-6225.
APA	E. W. Qin,L. Lu,N. R. Tao,J. Tan,&K. Lu.(2009).Enhanced fracture toughness and strength in bulk nanocrystalline Cu with nanoscale twin bundles.Acta Materialia,57(20),6215-6225.
MLA	E. W. Qin,et al."Enhanced fracture toughness and strength in bulk nanocrystalline Cu with nanoscale twin bundles".Acta Materialia 57.20(2009):6215-6225.