Effect of heat treatment on microstructure and mechanical properties of TiAl/Ti<sub>2</sub>AlNb joint by spark plasma diffusion bonding
TiAl/Ti<sub>2</sub>AlNb dissimilar alloys were successfully bonded together by spark plasma diffusion bonding. The joints were subjected to post-weld heat treatment at different temperatures. The microstructure of the welded joint was analyzed and the tensile strength and microhardness o...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | zho |
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Journal of Materials Engineering
2021-09-01
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| Series: | Cailiao gongcheng |
| Subjects: | |
| Online Access: | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2019.000866 |
| _version_ | 1797968704914325504 |
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| author | LYU Yan-long HE Jian-chao HOU Jin-bao ZHANG Bo-xian |
| author_facet | LYU Yan-long HE Jian-chao HOU Jin-bao ZHANG Bo-xian |
| author_sort | LYU Yan-long |
| collection | DOAJ |
| description | TiAl/Ti<sub>2</sub>AlNb dissimilar alloys were successfully bonded together by spark plasma diffusion bonding. The joints were subjected to post-weld heat treatment at different temperatures. The microstructure of the welded joint was analyzed and the tensile strength and microhardness of the joint were tested. The results indicate that after heat treatment, the microstructure of Ti<sub>2</sub>AlNb base metal, TiAl base metal and interface has no obvious change. In the Ti<sub>2</sub>AlNb heat affected zone(HAZ), most B2 phase gradually turns into O phase, due to the precipitation of acicular O phase, the microhardness increases significantly compared to as welded condition. With the increase of heat treatment temperature, the microhardness of the Ti<sub>2</sub>AlNb HAZ gradually decreases, meanwhile, the tensile strength of the joint at room temperature shows an evident increase compared to as welded. The maximum tensile strength of the joint reaches 376 MPa at heat treatment temperature of 900℃. After heat treatment, the fracture mode of the joint is brittle fracture. |
| first_indexed | 2024-04-11T02:50:59Z |
| format | Article |
| id | doaj.art-87cb4c6d6d274402b866ea2e68acea43 |
| institution | Directory Open Access Journal |
| issn | 1001-4381 |
| language | zho |
| last_indexed | 2024-04-11T02:50:59Z |
| publishDate | 2021-09-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj.art-87cb4c6d6d274402b866ea2e68acea432023-01-02T16:33:54ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43812021-09-01499879310.11868/j.issn.1001-4381.2019.00086620210909Effect of heat treatment on microstructure and mechanical properties of TiAl/Ti<sub>2</sub>AlNb joint by spark plasma diffusion bondingLYU Yan-long0HE Jian-chao1HOU Jin-bao2ZHANG Bo-xian3Aeronautical Key Laboratory for Welding and Joining Technologies, AVIC Manufacturing Technology Institute, Beijing 100024, ChinaAeronautical Key Laboratory for Welding and Joining Technologies, AVIC Manufacturing Technology Institute, Beijing 100024, ChinaAeronautical Key Laboratory for Welding and Joining Technologies, AVIC Manufacturing Technology Institute, Beijing 100024, ChinaSchool of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, Liaoning, ChinaTiAl/Ti<sub>2</sub>AlNb dissimilar alloys were successfully bonded together by spark plasma diffusion bonding. The joints were subjected to post-weld heat treatment at different temperatures. The microstructure of the welded joint was analyzed and the tensile strength and microhardness of the joint were tested. The results indicate that after heat treatment, the microstructure of Ti<sub>2</sub>AlNb base metal, TiAl base metal and interface has no obvious change. In the Ti<sub>2</sub>AlNb heat affected zone(HAZ), most B2 phase gradually turns into O phase, due to the precipitation of acicular O phase, the microhardness increases significantly compared to as welded condition. With the increase of heat treatment temperature, the microhardness of the Ti<sub>2</sub>AlNb HAZ gradually decreases, meanwhile, the tensile strength of the joint at room temperature shows an evident increase compared to as welded. The maximum tensile strength of the joint reaches 376 MPa at heat treatment temperature of 900℃. After heat treatment, the fracture mode of the joint is brittle fracture.http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2019.000866spark plasma diffusion bondingtialti<sub>2</sub>alnbtensile strengthmicrohardness |
| spellingShingle | LYU Yan-long HE Jian-chao HOU Jin-bao ZHANG Bo-xian Effect of heat treatment on microstructure and mechanical properties of TiAl/Ti<sub>2</sub>AlNb joint by spark plasma diffusion bonding Cailiao gongcheng spark plasma diffusion bonding tial ti<sub>2</sub>alnb tensile strength microhardness |
| title | Effect of heat treatment on microstructure and mechanical properties of TiAl/Ti<sub>2</sub>AlNb joint by spark plasma diffusion bonding |
| title_full | Effect of heat treatment on microstructure and mechanical properties of TiAl/Ti<sub>2</sub>AlNb joint by spark plasma diffusion bonding |
| title_fullStr | Effect of heat treatment on microstructure and mechanical properties of TiAl/Ti<sub>2</sub>AlNb joint by spark plasma diffusion bonding |
| title_full_unstemmed | Effect of heat treatment on microstructure and mechanical properties of TiAl/Ti<sub>2</sub>AlNb joint by spark plasma diffusion bonding |
| title_short | Effect of heat treatment on microstructure and mechanical properties of TiAl/Ti<sub>2</sub>AlNb joint by spark plasma diffusion bonding |
| title_sort | effect of heat treatment on microstructure and mechanical properties of tial ti sub 2 sub alnb joint by spark plasma diffusion bonding |
| topic | spark plasma diffusion bonding tial ti<sub>2</sub>alnb tensile strength microhardness |
| url | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2019.000866 |
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