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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MDPI AG
2020-09-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/19/4332 |
| _version_ | 1797552263011500032 |
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| author | Haiyang Jiang Jianyang Zhang Bijun Xie Zhangxun He Hao Zhang Bing Wang Bin Xu Yuxi Wu Mingyue Sun |
| author_facet | Haiyang Jiang Jianyang Zhang Bijun Xie Zhangxun He Hao Zhang Bing Wang Bin Xu Yuxi Wu Mingyue Sun |
| author_sort | Haiyang Jiang |
| collection | DOAJ |
| 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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| format | Article |
| id | doaj.art-12e7a6dec7474ae19ec61cf9cef7f6e1 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T15:57:31Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-12e7a6dec7474ae19ec61cf9cef7f6e12023-11-20T15:29:50ZengMDPI AGMaterials1996-19442020-09-011319433210.3390/ma13194332Impact Toughness Anisotropy of TA31 Titanium Alloy Cylindrical Shell after Ring RollingHaiyang Jiang0Jianyang Zhang1Bijun Xie2Zhangxun He3Hao Zhang4Bing Wang5Bin Xu6Yuxi Wu7Mingyue Sun8Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaKey Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaKey Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaWuhan Second Ship Design and Research Institute, Wuhan 430064, ChinaWuhan Second Ship Design and Research Institute, Wuhan 430064, ChinaKey Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaKey Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaKey Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaKey Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaThe 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.https://www.mdpi.com/1996-1944/13/19/4332TA31 titanium alloy cylindrical shellring rollingimpact toughness anisotropymicrostructureα phase orientation |
| spellingShingle | Haiyang Jiang Jianyang Zhang Bijun Xie Zhangxun He Hao Zhang Bing Wang Bin Xu Yuxi Wu Mingyue Sun Impact Toughness Anisotropy of TA31 Titanium Alloy Cylindrical Shell after Ring Rolling Materials TA31 titanium alloy cylindrical shell ring rolling impact toughness anisotropy microstructure α phase orientation |
| 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 | TA31 titanium alloy cylindrical shell ring rolling impact toughness anisotropy microstructure α phase orientation |
| url | https://www.mdpi.com/1996-1944/13/19/4332 |
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