The effect of pulsed current on the shear deformation behavior of Ti-6Al-4V alloy

Pulse current-assisted forming is a new technology to improve the plastic deformability of titanium alloy. In this work, Shearing tests of Ti-6Al-4V alloy were conducted using hat-shaped specimens under pulsed current (electroplastic shearing) and constant temperature (isothermal shearing). The actu...

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Autores principales: Zhao, Zhiyong, Wang, Guofeng, Hou, Hongliang, Zhang, Yanling, Wang, Yaoqi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6170433/
https://www.ncbi.nlm.nih.gov/pubmed/30282976
http://dx.doi.org/10.1038/s41598-018-32857-6
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author Zhao, Zhiyong
Wang, Guofeng
Hou, Hongliang
Zhang, Yanling
Wang, Yaoqi
author_facet Zhao, Zhiyong
Wang, Guofeng
Hou, Hongliang
Zhang, Yanling
Wang, Yaoqi
author_sort Zhao, Zhiyong
collection PubMed
description Pulse current-assisted forming is a new technology to improve the plastic deformability of titanium alloy. In this work, Shearing tests of Ti-6Al-4V alloy were conducted using hat-shaped specimens under pulsed current (electroplastic shearing) and constant temperature (isothermal shearing). The actual deformation in shear zone of electroplastic shearing was larger than that of isothermal shearing. The shear load is also decreased by the pulsed current. Microstructure variation in the shear zone was investigated by scanning electron microscopy. An evident straight shear band was observed in the electroplastic shearing specimens. The deformation model of shear zone was established. Intracrystalline deformation was markedly easier for the grains with the pulsed current and induced larger deformation of the grains along the shear direction. Microcracks were observed in the shear zone of isothermal shearing, but none were found in the shear zone of electroplastic shearing. Evident crack healing was found in the crack tip of the shear zone of electroplastic shearing.
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spelling pubmed-61704332018-10-05 The effect of pulsed current on the shear deformation behavior of Ti-6Al-4V alloy Zhao, Zhiyong Wang, Guofeng Hou, Hongliang Zhang, Yanling Wang, Yaoqi Sci Rep Article Pulse current-assisted forming is a new technology to improve the plastic deformability of titanium alloy. In this work, Shearing tests of Ti-6Al-4V alloy were conducted using hat-shaped specimens under pulsed current (electroplastic shearing) and constant temperature (isothermal shearing). The actual deformation in shear zone of electroplastic shearing was larger than that of isothermal shearing. The shear load is also decreased by the pulsed current. Microstructure variation in the shear zone was investigated by scanning electron microscopy. An evident straight shear band was observed in the electroplastic shearing specimens. The deformation model of shear zone was established. Intracrystalline deformation was markedly easier for the grains with the pulsed current and induced larger deformation of the grains along the shear direction. Microcracks were observed in the shear zone of isothermal shearing, but none were found in the shear zone of electroplastic shearing. Evident crack healing was found in the crack tip of the shear zone of electroplastic shearing. Nature Publishing Group UK 2018-10-03 /pmc/articles/PMC6170433/ /pubmed/30282976 http://dx.doi.org/10.1038/s41598-018-32857-6 Text en © The Author(s) 2018 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
Zhao, Zhiyong
Wang, Guofeng
Hou, Hongliang
Zhang, Yanling
Wang, Yaoqi
The effect of pulsed current on the shear deformation behavior of Ti-6Al-4V alloy
title The effect of pulsed current on the shear deformation behavior of Ti-6Al-4V alloy
title_full The effect of pulsed current on the shear deformation behavior of Ti-6Al-4V alloy
title_fullStr The effect of pulsed current on the shear deformation behavior of Ti-6Al-4V alloy
title_full_unstemmed The effect of pulsed current on the shear deformation behavior of Ti-6Al-4V alloy
title_short The effect of pulsed current on the shear deformation behavior of Ti-6Al-4V alloy
title_sort effect of pulsed current on the shear deformation behavior of ti-6al-4v alloy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6170433/
https://www.ncbi.nlm.nih.gov/pubmed/30282976
http://dx.doi.org/10.1038/s41598-018-32857-6
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