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Size effect of deformation nanotwin bundles on their strengthening and toughening in heterogeneous nanostructured Cu

文献类型：期刊论文

作者You Zesheng2; Luo Shusen1; Lu Lei1
刊名SCIENCE CHINA-TECHNOLOGICAL SCIENCES
出版日期2020-05-11
页码9
关键词fracture toughness nanotwins J-integral size effect toughening mechanism
ISSN号1674-7321
DOI10.1007/s11431-020-1584-6
通讯作者You Zesheng(zsyou@njust.edu.cn) ; Lu Lei(llu@imr.ac.cn)
英文摘要Herein, we fabricated a heterogeneous nanostructured Cu with deformation nanotwin bundles (NTBs) embedded in a matrix of nanograins by means of dynamic plastic deformation at liquid nitrogen temperature. We conducted fracture mechanical measurements to investigate the effect of longitudinal length of the NTBs on their strengthening and toughening. Results suggest that an increase in the NTB length had a marginal influence on the tensile strength; however, it remarkably promoted both fracture initiation toughness and crack growth toughness. Longer NTBs are more effective not only in intrinsically enhancing crack tip plasticity by suppressing the strain localization and void nucleation but also in serving as crack bridges behind the crack front to extrinsically resist the fracture by shielding the crack tip.
资助项目National Key R&D Program of China[2017YFA0204403] ; National Natural Science Foundation of China[U1608257] ; National Natural Science Foundation of China[51931010] ; Key Research Program of Frontier Science and the International Partnership Program[GJHZ2029] ; Chinese Academy of Sciences ; Liaoning Revitalization Talents Program[XLYC1802026]
WOS研究方向Engineering ; Materials Science
语种英语
WOS记录号WOS:000532654000001
出版者SCIENCE PRESS
资助机构National Key R&D Program of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Science and the International Partnership Program ; Chinese Academy of Sciences ; Liaoning Revitalization Talents Program
源URL[http://ir.imr.ac.cn/handle/321006/138750]  
专题金属研究所_中国科学院金属研究所
通讯作者You Zesheng; Lu Lei
作者单位1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
2.Nanjing Univ Sci & Technol, Herbert Gleiter Inst Nanosci, Nanjing 210094, Peoples R China
推荐引用方式
GB/T 7714		 You Zesheng,Luo Shusen,Lu Lei. Size effect of deformation nanotwin bundles on their strengthening and toughening in heterogeneous nanostructured Cu[J]. SCIENCE CHINA-TECHNOLOGICAL SCIENCES,2020:9.
APA You Zesheng,Luo Shusen,&Lu Lei.(2020).Size effect of deformation nanotwin bundles on their strengthening and toughening in heterogeneous nanostructured Cu.SCIENCE CHINA-TECHNOLOGICAL SCIENCES,9.
MLA You Zesheng,et al."Size effect of deformation nanotwin bundles on their strengthening and toughening in heterogeneous nanostructured Cu".SCIENCE CHINA-TECHNOLOGICAL SCIENCES (2020):9.

入库方式： OAI收割

来源：金属研究所

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