Effect of post-weld heat treatment on microstructure and mechanical properties of linear friction welded TC11 titanium alloy joints
Post-weld heat treatment(PWHT) could improve the microstructure and properties of linear friction welded joints. The linear friction welded joints of TC11 titanium alloy were double annealed at 950 ℃ and 530 ℃. The effect of double annealing on the microstructure of the joints was studied by microsc...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | zho |
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Journal of Materials Engineering
2023-10-01
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| Series: | Cailiao gongcheng |
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| Online Access: | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2022.000663 |
| _version_ | 1827365862906003456 |
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| author | WANG Xuyang LI Ju TAO Jun JIN Junlong LI Wenya |
| author_facet | WANG Xuyang LI Ju TAO Jun JIN Junlong LI Wenya |
| author_sort | WANG Xuyang |
| collection | DOAJ |
| description | Post-weld heat treatment(PWHT) could improve the microstructure and properties of linear friction welded joints. The linear friction welded joints of TC11 titanium alloy were double annealed at 950 ℃ and 530 ℃. The effect of double annealing on the microstructure of the joints was studied by microscopic analysis techniques such as optical microscopy(OM) and scanning electron microscopy(SEM). The results show that the dynamic recrystallization grains in the weld zone(WZ) completely disappear after PWHT, and are replaced by coarse needle, strip, and spherical α-phase grains; the degree of deformation of the thermos-mechanically affected zone(TMAZ) decreases. The grains grow, and some α structures are spheroidized. The secondary α phase in the base metal(BM) grows up in the shape of coarse needle and short rod. The grain orientation of the WZ and the TMAZ is more random after heat treatment, and the preferred orientation is significantly reduced. The mechanical properties tests indicate that the double annealing treatment after welding eliminates the high hardness zone in the center of the joint, and the center hardness is about 50HV lower than that of the as-welded joint. The hardness of TMAZ is about 30HV higher than that of the as-welded joint. No significant decrease in tensile strength presents after PWHT. The impact toughness of the joint reaches 61.3 J·cm-2 after PWHT, about 80% higher than that of the as-welded joint and close to that of the BM. |
| first_indexed | 2024-03-08T08:37:50Z |
| format | Article |
| id | doaj.art-e98b6488bdb348879e7921aaeb6211fb |
| institution | Directory Open Access Journal |
| issn | 1001-4381 |
| language | zho |
| last_indexed | 2024-03-08T08:37:50Z |
| publishDate | 2023-10-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj.art-e98b6488bdb348879e7921aaeb6211fb2024-02-02T00:40:05ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43812023-10-01511011812510.11868/j.issn.1001-4381.2022.00066320231013Effect of post-weld heat treatment on microstructure and mechanical properties of linear friction welded TC11 titanium alloy jointsWANG Xuyang0LI Ju1TAO Jun2JIN Junlong3LI Wenya4Shaanxi Key Laboratory of Friction Welding Technologies, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, 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, ChinaAeronautical Key Laboratory for Welding and Joining Technologies, AVIC Manufacturing Technology Institute, Beijing 100024, ChinaShaanxi Key Laboratory of Friction Welding Technologies, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, ChinaPost-weld heat treatment(PWHT) could improve the microstructure and properties of linear friction welded joints. The linear friction welded joints of TC11 titanium alloy were double annealed at 950 ℃ and 530 ℃. The effect of double annealing on the microstructure of the joints was studied by microscopic analysis techniques such as optical microscopy(OM) and scanning electron microscopy(SEM). The results show that the dynamic recrystallization grains in the weld zone(WZ) completely disappear after PWHT, and are replaced by coarse needle, strip, and spherical α-phase grains; the degree of deformation of the thermos-mechanically affected zone(TMAZ) decreases. The grains grow, and some α structures are spheroidized. The secondary α phase in the base metal(BM) grows up in the shape of coarse needle and short rod. The grain orientation of the WZ and the TMAZ is more random after heat treatment, and the preferred orientation is significantly reduced. The mechanical properties tests indicate that the double annealing treatment after welding eliminates the high hardness zone in the center of the joint, and the center hardness is about 50HV lower than that of the as-welded joint. The hardness of TMAZ is about 30HV higher than that of the as-welded joint. No significant decrease in tensile strength presents after PWHT. The impact toughness of the joint reaches 61.3 J·cm-2 after PWHT, about 80% higher than that of the as-welded joint and close to that of the BM.http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2022.000663tc11 titanium alloylinear friction weldingpost-weld heat treatmentmicrostructuremechanical property |
| spellingShingle | WANG Xuyang LI Ju TAO Jun JIN Junlong LI Wenya Effect of post-weld heat treatment on microstructure and mechanical properties of linear friction welded TC11 titanium alloy joints Cailiao gongcheng tc11 titanium alloy linear friction welding post-weld heat treatment microstructure mechanical property |
| title | Effect of post-weld heat treatment on microstructure and mechanical properties of linear friction welded TC11 titanium alloy joints |
| title_full | Effect of post-weld heat treatment on microstructure and mechanical properties of linear friction welded TC11 titanium alloy joints |
| title_fullStr | Effect of post-weld heat treatment on microstructure and mechanical properties of linear friction welded TC11 titanium alloy joints |
| title_full_unstemmed | Effect of post-weld heat treatment on microstructure and mechanical properties of linear friction welded TC11 titanium alloy joints |
| title_short | Effect of post-weld heat treatment on microstructure and mechanical properties of linear friction welded TC11 titanium alloy joints |
| title_sort | effect of post weld heat treatment on microstructure and mechanical properties of linear friction welded tc11 titanium alloy joints |
| topic | tc11 titanium alloy linear friction welding post-weld heat treatment microstructure mechanical property |
| url | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2022.000663 |
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