Inverse Hall-Petch Behavior for Nanocrystalline Aluminum Using Molecular Dynamics
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| Formato: | Artículo científico |
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Universidad Nacional de Colombia
2023
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| _version_ | 1876479767692181504 |
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| author | Alexandre M. Barboza |
| author_facet | Alexandre M. Barboza |
| contents | Inverse Hall-Petch Behavior for Nanocrystalline Aluminum Using Molecular Dynamics Alexandre M. Barboza Luis C. R. Aliaga Ivan N. Bastos Ingeniería Hall Petch Molecular dynamics mechanical behavior nanocrystalline aluminum This work investigates the mechanical behavior of nanocrystalline aluminum, with special focus on deformation mechanisms, using molecular dynamics simulations with an interatomic potential parameterized by the authors. To this end, four nanocrystalline samples with grain sizes ranging from 8,2 to 14,2 nm were constructed, each with a volume of 15 x 15 x 20 nm3. As expected, the data from the tensile tests at a strain rate of 1,0 x 109 s-1 showed an inverse Hall-Petch relationship. The work hardening behavior revealed no significant gain in mechanical strength. The dislocation analysis indicated that perfect dislocation density decreases during tensile testing, while the Shockley partials increase. Grain boundary-mediated plasticity was evidenced with atomic diffusion along grain boundaries, as well as by grain rotation. Thus, it is concluded that the conventional plastic deformation mechanisms of metals are not preponderant for nanocrystalline aluminum. 2023 artículo científico 0120-5609 https://www.redalyc.org/articulo.oa?id=64379907010 https://www.redalyc.org/journal/643/64379907010/ https://www.redalyc.org/journal/643/64379907010/html/ https://www.redalyc.org/journal/643/64379907010/64379907010.epub https://www.redalyc.org/journal/643/64379907010/movil 10.15446/ing.investig.93635 en http://www.redalyc.org/revista.oa?id=643 Ingeniería e Investigación application/pdf Universidad Nacional de Colombia Ingeniería e Investigación (Colombia) Num.1 Vol.43 |
| format | Artículo científico |
| id | redalyc_64379907010 |
| institution | Redalyc |
| language | en |
| publishDate | 2023 |
| publisher | Universidad Nacional de Colombia |
| spellingShingle | Inverse Hall-Petch Behavior for Nanocrystalline Aluminum Using Molecular Dynamics Alexandre M. Barboza Ingeniería Hall Petch Molecular dynamics mechanical behavior nanocrystalline aluminum Inverse Hall-Petch Behavior for Nanocrystalline Aluminum Using Molecular Dynamics Alexandre M. Barboza Luis C. R. Aliaga Ivan N. Bastos Ingeniería Hall Petch Molecular dynamics mechanical behavior nanocrystalline aluminum This work investigates the mechanical behavior of nanocrystalline aluminum, with special focus on deformation mechanisms, using molecular dynamics simulations with an interatomic potential parameterized by the authors. To this end, four nanocrystalline samples with grain sizes ranging from 8,2 to 14,2 nm were constructed, each with a volume of 15 x 15 x 20 nm3. As expected, the data from the tensile tests at a strain rate of 1,0 x 109 s-1 showed an inverse Hall-Petch relationship. The work hardening behavior revealed no significant gain in mechanical strength. The dislocation analysis indicated that perfect dislocation density decreases during tensile testing, while the Shockley partials increase. Grain boundary-mediated plasticity was evidenced with atomic diffusion along grain boundaries, as well as by grain rotation. Thus, it is concluded that the conventional plastic deformation mechanisms of metals are not preponderant for nanocrystalline aluminum. 2023 artículo científico 0120-5609 https://www.redalyc.org/articulo.oa?id=64379907010 https://www.redalyc.org/journal/643/64379907010/ https://www.redalyc.org/journal/643/64379907010/html/ https://www.redalyc.org/journal/643/64379907010/64379907010.epub https://www.redalyc.org/journal/643/64379907010/movil 10.15446/ing.investig.93635 en http://www.redalyc.org/revista.oa?id=643 Ingeniería e Investigación application/pdf Universidad Nacional de Colombia Ingeniería e Investigación (Colombia) Num.1 Vol.43 |
| title | Inverse Hall-Petch Behavior for Nanocrystalline Aluminum Using Molecular Dynamics |
| topic | Ingeniería Hall Petch Molecular dynamics mechanical behavior nanocrystalline aluminum |
| url | https://www.redalyc.org/articulo.oa?id=64379907010 https://www.redalyc.org/journal/643/64379907010/ https://www.redalyc.org/journal/643/64379907010/html/ https://www.redalyc.org/journal/643/64379907010/64379907010.epub https://www.redalyc.org/journal/643/64379907010/movil |