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Effects of Crystalline Anisotropy and Indenter Size on Nanoindentation by Multiscale Simulation
Nanoindentation processes in single crystal Ag thin film under different crystallographic orientations and various indenter widths are simulated by the quasicontinuum method. The nanoindentation deformation processes under influences of crystalline anisotropy and indenter size are investigated about...
Autores principales: | , , , |
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Formato: | Texto |
Lenguaje: | English |
Publicado: |
Springer
2009
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2894216/ https://www.ncbi.nlm.nih.gov/pubmed/20672077 http://dx.doi.org/10.1007/s11671-009-9500-x |
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author | Li, Junwan Ni, Yushan Wang, Hongsheng Mei, Jifa |
author_facet | Li, Junwan Ni, Yushan Wang, Hongsheng Mei, Jifa |
author_sort | Li, Junwan |
collection | PubMed |
description | Nanoindentation processes in single crystal Ag thin film under different crystallographic orientations and various indenter widths are simulated by the quasicontinuum method. The nanoindentation deformation processes under influences of crystalline anisotropy and indenter size are investigated about hardness, load distribution, critical load for first dislocation emission and strain energy under the indenter. The simulation results are compared with previous experimental results and Rice-Thomson (R-T) dislocation model solution. It is shown that entirely different dislocation activities are presented under the effect of crystalline anisotropy during nanoindentation. The sharp load drops in the load–displacement curves are caused by the different dislocation activities. Both crystalline anisotropy and indenter size are found to have distinct effect on hardness, contact stress distribution, critical load for first dislocation emission and strain energy under the indenter. The above quantities are decreased at the indenter into Ag thin film along the crystal orientation with more favorable slip directions that easy trigger slip systems; whereas those will increase at the indenter into Ag thin film along the crystal orientation with less or without favorable slip directions that hard trigger slip systems. The results are shown to be in good agreement with experimental results and R-T dislocation model solution. |
format | Text |
id | pubmed-2894216 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2009 |
publisher | Springer |
record_format | MEDLINE/PubMed |
spelling | pubmed-28942162010-07-28 Effects of Crystalline Anisotropy and Indenter Size on Nanoindentation by Multiscale Simulation Li, Junwan Ni, Yushan Wang, Hongsheng Mei, Jifa Nanoscale Res Lett Nano Express Nanoindentation processes in single crystal Ag thin film under different crystallographic orientations and various indenter widths are simulated by the quasicontinuum method. The nanoindentation deformation processes under influences of crystalline anisotropy and indenter size are investigated about hardness, load distribution, critical load for first dislocation emission and strain energy under the indenter. The simulation results are compared with previous experimental results and Rice-Thomson (R-T) dislocation model solution. It is shown that entirely different dislocation activities are presented under the effect of crystalline anisotropy during nanoindentation. The sharp load drops in the load–displacement curves are caused by the different dislocation activities. Both crystalline anisotropy and indenter size are found to have distinct effect on hardness, contact stress distribution, critical load for first dislocation emission and strain energy under the indenter. The above quantities are decreased at the indenter into Ag thin film along the crystal orientation with more favorable slip directions that easy trigger slip systems; whereas those will increase at the indenter into Ag thin film along the crystal orientation with less or without favorable slip directions that hard trigger slip systems. The results are shown to be in good agreement with experimental results and R-T dislocation model solution. Springer 2009-11-27 /pmc/articles/PMC2894216/ /pubmed/20672077 http://dx.doi.org/10.1007/s11671-009-9500-x Text en Copyright © 2009 The Author(s) https://creativecommons.org/licenses/by-nc/4.0/ This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited. |
spellingShingle | Nano Express Li, Junwan Ni, Yushan Wang, Hongsheng Mei, Jifa Effects of Crystalline Anisotropy and Indenter Size on Nanoindentation by Multiscale Simulation |
title | Effects of Crystalline Anisotropy and Indenter Size on Nanoindentation by Multiscale Simulation |
title_full | Effects of Crystalline Anisotropy and Indenter Size on Nanoindentation by Multiscale Simulation |
title_fullStr | Effects of Crystalline Anisotropy and Indenter Size on Nanoindentation by Multiscale Simulation |
title_full_unstemmed | Effects of Crystalline Anisotropy and Indenter Size on Nanoindentation by Multiscale Simulation |
title_short | Effects of Crystalline Anisotropy and Indenter Size on Nanoindentation by Multiscale Simulation |
title_sort | effects of crystalline anisotropy and indenter size on nanoindentation by multiscale simulation |
topic | Nano Express |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2894216/ https://www.ncbi.nlm.nih.gov/pubmed/20672077 http://dx.doi.org/10.1007/s11671-009-9500-x |
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