Orientation dependence of the nano-indentation behaviour of pure Tungsten

被引：12

作者：

Yu, Hongbing ^{[1
]}

Das, Suchandrima ^{[1
]}

Yu, Haiyang ^{[2
]}

Karamched, Phani ^{[2
]}

Tarleton, Edmund ^{[1
]}

Hofmann, Felix ^{[1
]}

机构：

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

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

来源：

SCRIPTA MATERIALIA | 2020年 / 189卷

基金：

英国工程与自然科学研究理事会;

关键词：

Orientation-dependence; Tungsten; Nano-indentation; HR-ESBD; ELASTIC STRAIN; LATTICE ROTATIONS; NANOINDENTATION; DIFFRACTION; PLASTICITY; PATTERNS; DENSITY;

D O I：

10.1016/j.scriptamat.2020.08.014

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Coupling of nano-indentation and crystal plasticity finite element (CPFE) simulations is widely used to quantitatively probe the small-scale mechanical behaviour of materials. Earlier studies showed that CPFE can successfully reproduce the load-displacement curves and surface morphology for different crystal orientations. Here, we report the orientation dependence of residual lattice strain patterns and dislocation structures in tungsten. For orientations with one or more Burgers vectors close to parallel to the sample surface, dislocation movement and residual lattice strains are confined to long, narrow channels. CPFE is unable to reproduce this behaviour, and our analysis reveals the responsible underlying mechanisms. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：135 / 139

页数：5

共 29 条

[1] Effects of sequential tungsten and helium ion implantation on nano-indentation hardness of tungsten [J].

Armstrong, D. E. J. ;

Edmondson, P. D. ;

Roberts, S. G. .

APPLIED PHYSICS LETTERS, 2013, 102 (25)

[2] Space rocks and optimising scanning electron channelling contrast [J].

Ben Britton, T. ;

Goran, Daniel ;

Tong, Vivian S. .

MATERIALS CHARACTERIZATION, 2018, 142 :422-431

[3] High resolution electron backscatter diffraction measurements of elastic strain variations in the presence of larger lattice rotations [J].

Britton, T. B. ;

Wilkinson, A. J. .

ULTRAMICROSCOPY, 2012, 114 :82-95

[4] Measurement of residual elastic strain and lattice rotations with high resolution electron backscatter diffraction [J].

Britton, T. B. ;

Wilkinson, A. J. .

ULTRAMICROSCOPY, 2011, 111 (08) :1395-1404

[5] The effect of crystal orientation on the indentation response of commercially pure titanium: experiments and simulations [J].

Britton, T. B. ;

Liang, H. ;

Dunne, F. P. E. ;

Wilkinson, A. J. .

PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 2010, 466 (2115) :695-719

[6] The effect of helium implantation on the deformation behaviour of tungsten: X-ray micro-diffraction and nanoindentation [J].

Das, S. ;

Armstrong, D. E. J. ;

Zayachuk, Y. ;

Liu, W. ;

Xu, R. ;

Hofmann, F. .

SCRIPTA MATERIALIA, 2018, 146 :335-339

[7] Hardening and Strain Localisation in Helium-Ion-Implanted Tungsten [J].

Das, Suchandrima ;

Yu, Hongbing ;

Tarleton, Edmund ;

Hofmann, Felix .

SCIENTIFIC REPORTS, 2019, 9 (1)

[8] Orientation-dependent indentation response of helium-implanted tungsten [J].

Das, Suchandrima ;

Yu, Hongbing ;

Tarleton, Edmund ;

Hofmann, Felix .

APPLIED PHYSICS LETTERS, 2019, 114 (22)

[9] Consistent determination of geometrically necessary dislocation density from simulations and experiments [J].

Das, Suchandrima ;

Hofmann, Felix ;

Tarleton, Edmund .

INTERNATIONAL JOURNAL OF PLASTICITY, 2018, 109 :18-42

[10] Multiscale modelling of plastic flow localization in irradiated materials [J].

de la Rubia, TD ;

Zbib, HM ;

Khraishi, TA ;

Wirth, BD ;

Victoria, M ;

Caturla, MJ .

NATURE, 2000, 406 (6798) :871-874

← 1 2 3 →