期刊
SCRIPTA MATERIALIA
卷 189, 期 -, 页码 135-139出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2020.08.014
关键词
Orientation-dependence; Tungsten; Nano-indentation; HR-ESBD
类别
资金
- Leverhulme Trust [RPG-2016-190]
- Engineering and Physical Sciences Research Council [EP/N007239/1]
- EPSRC [EP/N007239/1] Funding Source: UKRI
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.
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