From micro- to nano-scale molding of metals: Size effect during molding of single crystal Al with rectangular strip punches

被引：18

作者：

Chen, Ke ^{[1
]}

Meng, W. J. ^{[1
]}

Mei, Fanghua ^{[2
]}

Hiller, J. ^{[3
]}

Miller, D. J. ^{[3
]}

机构：

[1] Louisiana State Univ, Dept Mech Engn, Baton Rouge, LA 70803 USA

[2] Enervana Technol LLC, Baton Rouge, LA 70820 USA

[3] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

来源：

ACTA MATERIALIA | 2011年 / 59卷 / 03期

关键词：

Mechanical properties testing; Compression test; Metal and alloys; Mechanical properties; Plastic deformation; STRAIN GRADIENT PLASTICITY; ELASTIC-MODULUS; INDENTATION; INSERTS; HARDNESS; FABRICATION;

D O I：

10.1016/j.actamat.2010.10.044

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A single crystal Al specimen was molded at room temperature with long, rectangular, strip diamond punches. Quantitative molding response curves were obtained at a series of punch widths, ranging from 5 mu m to 550 nm. A significant size effect was observed, manifesting itself in terms of significantly increasing characteristic molding pressure as the punch width decreases to 1.5 mu m and below. A detailed comparison of the present strip punch molding results was made with Berkovich pyramidal indentation on the same single crystal Al specimen. The comparison reveals distinctly different dependence of the characteristic pressure on corresponding characteristic length. The present results show the feasibility of micro-/nano-scale compression molding as a micro-/nano-fabrication technique, and offer an experimental test case for size-dependent plasticity theories. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1112 / 1120

页数：9

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