Cargando…
Strength and ductility with {101̄1} — {101̄2} double twinning in a magnesium alloy
Based on their high specific strength and stiffness, magnesium alloys are attractive for lightweight applications in aerospace and transportation, where weight saving is crucial for the reduction of carbon dioxide emissions. Unfortunately, the ductility of magnesium alloys is usually limited. It is...
Autores principales: | , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5482718/ https://www.ncbi.nlm.nih.gov/pubmed/27040648 http://dx.doi.org/10.1038/ncomms11068 |
_version_ | 1783245619367772160 |
---|---|
author | Lentz, M. Risse, M. Schaefer, N. Reimers, W. Beyerlein, I. J. |
author_facet | Lentz, M. Risse, M. Schaefer, N. Reimers, W. Beyerlein, I. J. |
author_sort | Lentz, M. |
collection | PubMed |
description | Based on their high specific strength and stiffness, magnesium alloys are attractive for lightweight applications in aerospace and transportation, where weight saving is crucial for the reduction of carbon dioxide emissions. Unfortunately, the ductility of magnesium alloys is usually limited. It is thought that one reason for the lack of ductility is that the development of [Image: see text]—[Image: see text] double twins (DTW) cause premature failure of magnesium alloys. Here we show with a magnesium alloy containing 4 wt% lithium, that the same impressively large compression failure strains can be achieved with DTWs as without. The DTWs form stably across the microstructure and continuously throughout straining, forming three-dimensional intra-granular networks, a potential strengthening mechanism. We rationalize that relatively easier <c+a> slip characteristic of this alloy plastically relaxed the localized stress concentrations that DTWs can generate. This result may provide key insight and an alternative perspective towards designing formable and strong magnesium alloys. |
format | Online Article Text |
id | pubmed-5482718 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-54827182017-07-06 Strength and ductility with {101̄1} — {101̄2} double twinning in a magnesium alloy Lentz, M. Risse, M. Schaefer, N. Reimers, W. Beyerlein, I. J. Nat Commun Article Based on their high specific strength and stiffness, magnesium alloys are attractive for lightweight applications in aerospace and transportation, where weight saving is crucial for the reduction of carbon dioxide emissions. Unfortunately, the ductility of magnesium alloys is usually limited. It is thought that one reason for the lack of ductility is that the development of [Image: see text]—[Image: see text] double twins (DTW) cause premature failure of magnesium alloys. Here we show with a magnesium alloy containing 4 wt% lithium, that the same impressively large compression failure strains can be achieved with DTWs as without. The DTWs form stably across the microstructure and continuously throughout straining, forming three-dimensional intra-granular networks, a potential strengthening mechanism. We rationalize that relatively easier <c+a> slip characteristic of this alloy plastically relaxed the localized stress concentrations that DTWs can generate. This result may provide key insight and an alternative perspective towards designing formable and strong magnesium alloys. Nature Publishing Group 2016-04-04 /pmc/articles/PMC5482718/ /pubmed/27040648 http://dx.doi.org/10.1038/ncomms11068 Text en Copyright © 2016, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Lentz, M. Risse, M. Schaefer, N. Reimers, W. Beyerlein, I. J. Strength and ductility with {101̄1} — {101̄2} double twinning in a magnesium alloy |
title | Strength and ductility with {101̄1} — {101̄2} double twinning in a magnesium alloy |
title_full | Strength and ductility with {101̄1} — {101̄2} double twinning in a magnesium alloy |
title_fullStr | Strength and ductility with {101̄1} — {101̄2} double twinning in a magnesium alloy |
title_full_unstemmed | Strength and ductility with {101̄1} — {101̄2} double twinning in a magnesium alloy |
title_short | Strength and ductility with {101̄1} — {101̄2} double twinning in a magnesium alloy |
title_sort | strength and ductility with {101̄1} — {101̄2} double twinning in a magnesium alloy |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5482718/ https://www.ncbi.nlm.nih.gov/pubmed/27040648 http://dx.doi.org/10.1038/ncomms11068 |
work_keys_str_mv | AT lentzm strengthandductilitywith10111012doubletwinninginamagnesiumalloy AT rissem strengthandductilitywith10111012doubletwinninginamagnesiumalloy AT schaefern strengthandductilitywith10111012doubletwinninginamagnesiumalloy AT reimersw strengthandductilitywith10111012doubletwinninginamagnesiumalloy AT beyerleinij strengthandductilitywith10111012doubletwinninginamagnesiumalloy |