Cargando…
The mechanism for the different effects of texture on yield strength and hardness of Mg alloys
A study regarding the effect of texture on tensile yield strength and hardness of an extruded Mg-15Gd-0.5Zr rod was performed, with a great emphasis laid on the relevant mechanisms. A 7% pre-tension along the extrusion direction (ED) in the solid solution condition was used to transform the texture...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5561024/ https://www.ncbi.nlm.nih.gov/pubmed/28819311 http://dx.doi.org/10.1038/s41598-017-08966-z |
_version_ | 1783257756805890048 |
---|---|
author | Guo, Feilong Yu, Huihui Wu, Chenyu Xin, Yunchang He, Cong Liu, Qing |
author_facet | Guo, Feilong Yu, Huihui Wu, Chenyu Xin, Yunchang He, Cong Liu, Qing |
author_sort | Guo, Feilong |
collection | PubMed |
description | A study regarding the effect of texture on tensile yield strength and hardness of an extruded Mg-15Gd-0.5Zr rod was performed, with a great emphasis laid on the relevant mechanisms. A 7% pre-tension along the extrusion direction (ED) in the solid solution condition was used to transform the texture from a broad distribution of basal poles with a peak approximately 45° with respect to the ED into a texture with basal poles largely perpendicular to the ED. This texture variation enhances the yield strength of peak aged sample by approximately 103 MPa, while hardly increases the peak hardness. The analysis about the ratio of the critical resolved shear stress (CRSS) to Schmid factor shows that this texture variation results in a larger fraction of grains favoring prismatic slip with a higher activation stress under tension along the ED. In contrast, the complex stress state during hardness test initiates multiple deformation modes, which renders the value of hardness insensitive to the texture variation. This different dependence of deformation modes on texture mainly accounts for the different increments in hardness and tensile yield strength. |
format | Online Article Text |
id | pubmed-5561024 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-55610242017-08-18 The mechanism for the different effects of texture on yield strength and hardness of Mg alloys Guo, Feilong Yu, Huihui Wu, Chenyu Xin, Yunchang He, Cong Liu, Qing Sci Rep Article A study regarding the effect of texture on tensile yield strength and hardness of an extruded Mg-15Gd-0.5Zr rod was performed, with a great emphasis laid on the relevant mechanisms. A 7% pre-tension along the extrusion direction (ED) in the solid solution condition was used to transform the texture from a broad distribution of basal poles with a peak approximately 45° with respect to the ED into a texture with basal poles largely perpendicular to the ED. This texture variation enhances the yield strength of peak aged sample by approximately 103 MPa, while hardly increases the peak hardness. The analysis about the ratio of the critical resolved shear stress (CRSS) to Schmid factor shows that this texture variation results in a larger fraction of grains favoring prismatic slip with a higher activation stress under tension along the ED. In contrast, the complex stress state during hardness test initiates multiple deformation modes, which renders the value of hardness insensitive to the texture variation. This different dependence of deformation modes on texture mainly accounts for the different increments in hardness and tensile yield strength. Nature Publishing Group UK 2017-08-17 /pmc/articles/PMC5561024/ /pubmed/28819311 http://dx.doi.org/10.1038/s41598-017-08966-z Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Guo, Feilong Yu, Huihui Wu, Chenyu Xin, Yunchang He, Cong Liu, Qing The mechanism for the different effects of texture on yield strength and hardness of Mg alloys |
title | The mechanism for the different effects of texture on yield strength and hardness of Mg alloys |
title_full | The mechanism for the different effects of texture on yield strength and hardness of Mg alloys |
title_fullStr | The mechanism for the different effects of texture on yield strength and hardness of Mg alloys |
title_full_unstemmed | The mechanism for the different effects of texture on yield strength and hardness of Mg alloys |
title_short | The mechanism for the different effects of texture on yield strength and hardness of Mg alloys |
title_sort | mechanism for the different effects of texture on yield strength and hardness of mg alloys |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5561024/ https://www.ncbi.nlm.nih.gov/pubmed/28819311 http://dx.doi.org/10.1038/s41598-017-08966-z |
work_keys_str_mv | AT guofeilong themechanismforthedifferenteffectsoftextureonyieldstrengthandhardnessofmgalloys AT yuhuihui themechanismforthedifferenteffectsoftextureonyieldstrengthandhardnessofmgalloys AT wuchenyu themechanismforthedifferenteffectsoftextureonyieldstrengthandhardnessofmgalloys AT xinyunchang themechanismforthedifferenteffectsoftextureonyieldstrengthandhardnessofmgalloys AT hecong themechanismforthedifferenteffectsoftextureonyieldstrengthandhardnessofmgalloys AT liuqing themechanismforthedifferenteffectsoftextureonyieldstrengthandhardnessofmgalloys AT guofeilong mechanismforthedifferenteffectsoftextureonyieldstrengthandhardnessofmgalloys AT yuhuihui mechanismforthedifferenteffectsoftextureonyieldstrengthandhardnessofmgalloys AT wuchenyu mechanismforthedifferenteffectsoftextureonyieldstrengthandhardnessofmgalloys AT xinyunchang mechanismforthedifferenteffectsoftextureonyieldstrengthandhardnessofmgalloys AT hecong mechanismforthedifferenteffectsoftextureonyieldstrengthandhardnessofmgalloys AT liuqing mechanismforthedifferenteffectsoftextureonyieldstrengthandhardnessofmgalloys |