Critical dimension for the dislocation structure in deformed copper micropillars

Zhao, X. X.1; Wu, J.1; Chiu, Y. L.1; Jones, I. P.1; Gu, R.2; Ngan, A. H. W.3

2019-04

10.1016/j.scriptamat.2019.01.020

SCRIPTA MATERIALIA   影响因子和分区

1359-6462

Although the effect of specimen size on strength has been well documented for metal micro-samples significantly larger than similar to 1 mu m, less is known about the deformation induced dislocation structure, especially just above the size at which dislocation starvation happens. Here, uniaxial compression tests were performed on cylindrical [011] oriented copper micropillars with diameters of 1 mu m, 3 mu m and 5 mu m. Dislocation cells formed in a fractal geometry in the 3 mu m and 5 mu m pillars, while dislocations were not retained in the 1 mu m pillars. The effects of strain and strain rate on cell formation were also investigated. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Copper Micropillar Dislocation cell Fractal Focussed ion beam (FIB)

SCI ; EI

英语

其他

China Scholarship Council[2009612011]

Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000458940000029

PERGAMON-ELSEVIER SCIENCE LTD

20190406411184

Cellular manufacturing ; Compression testing ; Copper ; Fractals ; Ion beams

Copper:544.1 ; Cellular Manufacturing:913.4.3 ; Mathematics:921 ; High Energy Physics:932.1

MATERIALS SCIENCE

Web of Science

1.Univ Birmingham, Sch Met & Mat, Birmingham B15 2TT, W Midlands, England
2.Southern Univ Sci & Technol, Mat Characterizat & Preparat Ctr, 1088 Xueyuan Rd, Shenzhen, Guangdong, Peoples R China
3.Univ Hong Kong, Dept Mech Engn, Pokfulam Rd, Hong Kong, Peoples R China

Zhao, X. X.,Wu, J.,Chiu, Y. L.,et al. Critical dimension for the dislocation structure in deformed copper micropillars[J]. SCRIPTA MATERIALIA,2019,163:137-141.

Zhao, X. X.,Wu, J.,Chiu, Y. L.,Jones, I. P.,Gu, R.,&Ngan, A. H. W..(2019).Critical dimension for the dislocation structure in deformed copper micropillars.SCRIPTA MATERIALIA,163,137-141.

Zhao, X. X.,et al."Critical dimension for the dislocation structure in deformed copper micropillars".SCRIPTA MATERIALIA 163(2019):137-141.