Correcting for contact area changes in nanoindentation using surface acoustic waves

被引：33

作者：

Beck, Christian E. ^{[1
]}

Hofmann, Felix ^{[2
]}

Eliason, Jeffrey K. ^{[3
,4
]}

Maznev, Alexei. A. ^{[3
]}

Nelson, Keith A. ^{[3
]}

Armstrong, David E. J. ^{[1
]}

机构：

[1] Univ Oxford, Dept Mat, Parks Rd, Oxford OX1 3PH, England

[2] Univ Oxford, Dept Engn Sci, Parks Rd, Oxford OX1 3PJ, England

[3] MIT, Dept Chem, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[4] Univ Minnesota, Dept Chem Engn & Mat Sci, 421 Washington Ave SE, Minneapolis, MN 55455 USA

来源：

SCRIPTA MATERIALIA | 2017年 / 128卷

基金：

英国工程与自然科学研究理事会; 美国国家科学基金会;

关键词：

Nanoindentation; Pile-up; Ion implantation; Irradiation; Surface acoustic waves; IMPLANTED TUNGSTEN; MODULUS; HARDNESS; HELIUM; LOAD;

D O I：

10.1016/j.scriptamat.2016.09.037

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Nanoindentation is extensively used to quantify nano-scale mechanical behaviour. A widely-used assumption is that a well-defined, material-independent relationship exists between the indentation depth and indenter contact area. Here we demonstrate that this assumption is violated by ion-implanted tungsten, where pileup around the indenter tip leads to substantial changes in contact area. Using high accuracy surface acoustic wave measurements of elastic modulus, we are able to correct for this effect. Importantly we demonstrate that a priori knowledge of elastic properties can be readily used to compensate for pileup effects in nanoindentation without the need for any further measurements. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：83 / 86

页数：4

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