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Impact Toughness Anisotropy of TA31 Titanium Alloy Cylindrical Shell after Ring Rolling

The impact toughness of a TA31 titanium alloy cylindrical shell was investigated systemically after ring rolling. The impact toughness of specimens with different notch orientations shows obvious anisotropy. The microstructure of the cylindrical shell and the impact fracture were characterized by an...

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Autores principales: Jiang, Haiyang, Zhang, Jianyang, Xie, Bijun, He, Zhangxun, Zhang, Hao, Wang, Bing, Xu, Bin, Wu, Yuxi, Sun, Mingyue
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7579025/
https://www.ncbi.nlm.nih.gov/pubmed/33003403
http://dx.doi.org/10.3390/ma13194332
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author Jiang, Haiyang
Zhang, Jianyang
Xie, Bijun
He, Zhangxun
Zhang, Hao
Wang, Bing
Xu, Bin
Wu, Yuxi
Sun, Mingyue
author_facet Jiang, Haiyang
Zhang, Jianyang
Xie, Bijun
He, Zhangxun
Zhang, Hao
Wang, Bing
Xu, Bin
Wu, Yuxi
Sun, Mingyue
author_sort Jiang, Haiyang
collection PubMed
description The impact toughness of a TA31 titanium alloy cylindrical shell was investigated systemically after ring rolling. The impact toughness of specimens with different notch orientations shows obvious anisotropy. The microstructure of the cylindrical shell and the impact fracture were characterized by an optical microscope and scanning electron microscope. The results show that cracks are easier to propagate in the equiaxed α phase than the elongated α phase. This is because the expanding cracking path in the equiaxed α phase is shorter than that in the elongated α phase, and thereby the cracks are easier to propagate in the equiaxed α phase than the elongated α phase. More specifically, the α phase on the RD-TD plane was obviously isotropic, which makes it easy for the cracks to propagate along α grains in the same direction. However, the α phase on the RD-ND plane has a layered characteristic, and the direction of the α phase varies from layer to layer, thus it requires higher energy for cracks to propagate across this layered α phase. Therefore, the cracks propagating in the same α phase orientation take easier than that in the layered α phase, so it has lower impact toughness.
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spelling pubmed-75790252020-10-29 Impact Toughness Anisotropy of TA31 Titanium Alloy Cylindrical Shell after Ring Rolling Jiang, Haiyang Zhang, Jianyang Xie, Bijun He, Zhangxun Zhang, Hao Wang, Bing Xu, Bin Wu, Yuxi Sun, Mingyue Materials (Basel) Article The impact toughness of a TA31 titanium alloy cylindrical shell was investigated systemically after ring rolling. The impact toughness of specimens with different notch orientations shows obvious anisotropy. The microstructure of the cylindrical shell and the impact fracture were characterized by an optical microscope and scanning electron microscope. The results show that cracks are easier to propagate in the equiaxed α phase than the elongated α phase. This is because the expanding cracking path in the equiaxed α phase is shorter than that in the elongated α phase, and thereby the cracks are easier to propagate in the equiaxed α phase than the elongated α phase. More specifically, the α phase on the RD-TD plane was obviously isotropic, which makes it easy for the cracks to propagate along α grains in the same direction. However, the α phase on the RD-ND plane has a layered characteristic, and the direction of the α phase varies from layer to layer, thus it requires higher energy for cracks to propagate across this layered α phase. Therefore, the cracks propagating in the same α phase orientation take easier than that in the layered α phase, so it has lower impact toughness. MDPI 2020-09-29 /pmc/articles/PMC7579025/ /pubmed/33003403 http://dx.doi.org/10.3390/ma13194332 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Jiang, Haiyang
Zhang, Jianyang
Xie, Bijun
He, Zhangxun
Zhang, Hao
Wang, Bing
Xu, Bin
Wu, Yuxi
Sun, Mingyue
Impact Toughness Anisotropy of TA31 Titanium Alloy Cylindrical Shell after Ring Rolling
title Impact Toughness Anisotropy of TA31 Titanium Alloy Cylindrical Shell after Ring Rolling
title_full Impact Toughness Anisotropy of TA31 Titanium Alloy Cylindrical Shell after Ring Rolling
title_fullStr Impact Toughness Anisotropy of TA31 Titanium Alloy Cylindrical Shell after Ring Rolling
title_full_unstemmed Impact Toughness Anisotropy of TA31 Titanium Alloy Cylindrical Shell after Ring Rolling
title_short Impact Toughness Anisotropy of TA31 Titanium Alloy Cylindrical Shell after Ring Rolling
title_sort impact toughness anisotropy of ta31 titanium alloy cylindrical shell after ring rolling
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7579025/
https://www.ncbi.nlm.nih.gov/pubmed/33003403
http://dx.doi.org/10.3390/ma13194332
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