Non-monotonic evolution of microstructure and fatigue properties of round bar–plate rotary friction welding joints in 304 austenitic stainless steel
In this study, the structure and fatigue properties of a new type asymmetric round bar–plate rotary friction welding (RFW) joints with three kinds of welding time, 0.8 s, 1.2 s and 3.6 s, were investigated. The results show that the RFW processing evolves from the heat stage to the quasi-steady stag...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127522010231 |
| _version_ | 1811292514174369792 |
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| author | Kejin Zhang Xusheng Qian Jieshi Chen Junmei Chen Hao Lu |
| author_facet | Kejin Zhang Xusheng Qian Jieshi Chen Junmei Chen Hao Lu |
| author_sort | Kejin Zhang |
| collection | DOAJ |
| description | In this study, the structure and fatigue properties of a new type asymmetric round bar–plate rotary friction welding (RFW) joints with three kinds of welding time, 0.8 s, 1.2 s and 3.6 s, were investigated. The results show that the RFW processing evolves from the heat stage to the quasi-steady stage with a trade-off of dynamic recrystallization (DRX) and grain boundary sliding (GBS). From 0 s for the base metal (BM) to 3.6 s, the DRX intensity changes from strong to weak relative to the GBS intensity, resulting in the non-monotonic evolution of the microstructure, e.g., the texture, the average grain size and the geometrically necessary dislocation, with welding time. The evolution results in non-monotonic evolution of the fatigue properties: specimens with welding time of 0.8 s, 1.2 s and 3.6 s, have fatigue lives of approximately 150,000, 200,000, and 100,000 cycles, respectively. The microstructure evolves with the welding time through the texture strength, grain size, and dislocation density, affecting the dislocation and slip mobility. This evolution not only directly affects the rates of crack initiation and extension, but also makes the initiation point of fatigue crack change on the fillet, which affects the fatigue life. |
| first_indexed | 2024-04-13T04:46:35Z |
| format | Article |
| id | doaj.art-02bd8f9aab9643da958f433974f6aa28 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-13T04:46:35Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-02bd8f9aab9643da958f433974f6aa282022-12-22T03:01:49ZengElsevierMaterials & Design0264-12752022-12-01224111400Non-monotonic evolution of microstructure and fatigue properties of round bar–plate rotary friction welding joints in 304 austenitic stainless steelKejin Zhang0Xusheng Qian1Jieshi Chen2Junmei Chen3Hao Lu4Shanghai Key Laboratory of Materials Laser Processing and Modification, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaShanghai Key Laboratory of Materials Laser Processing and Modification, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaShanghai Key Laboratory of Materials Laser Processing and Modification, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201602, ChinaShanghai Key Laboratory of Materials Laser Processing and Modification, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Corresponding authors.Shanghai Key Laboratory of Materials Laser Processing and Modification, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Corresponding authors.In this study, the structure and fatigue properties of a new type asymmetric round bar–plate rotary friction welding (RFW) joints with three kinds of welding time, 0.8 s, 1.2 s and 3.6 s, were investigated. The results show that the RFW processing evolves from the heat stage to the quasi-steady stage with a trade-off of dynamic recrystallization (DRX) and grain boundary sliding (GBS). From 0 s for the base metal (BM) to 3.6 s, the DRX intensity changes from strong to weak relative to the GBS intensity, resulting in the non-monotonic evolution of the microstructure, e.g., the texture, the average grain size and the geometrically necessary dislocation, with welding time. The evolution results in non-monotonic evolution of the fatigue properties: specimens with welding time of 0.8 s, 1.2 s and 3.6 s, have fatigue lives of approximately 150,000, 200,000, and 100,000 cycles, respectively. The microstructure evolves with the welding time through the texture strength, grain size, and dislocation density, affecting the dislocation and slip mobility. This evolution not only directly affects the rates of crack initiation and extension, but also makes the initiation point of fatigue crack change on the fillet, which affects the fatigue life.http://www.sciencedirect.com/science/article/pii/S0264127522010231304 stainless steelsRound bar–plate type rotary friction weldingWelding timeMicrostructureFatigue lifeFatigue crack initiation point |
| spellingShingle | Kejin Zhang Xusheng Qian Jieshi Chen Junmei Chen Hao Lu Non-monotonic evolution of microstructure and fatigue properties of round bar–plate rotary friction welding joints in 304 austenitic stainless steel Materials & Design 304 stainless steels Round bar–plate type rotary friction welding Welding time Microstructure Fatigue life Fatigue crack initiation point |
| title | Non-monotonic evolution of microstructure and fatigue properties of round bar–plate rotary friction welding joints in 304 austenitic stainless steel |
| title_full | Non-monotonic evolution of microstructure and fatigue properties of round bar–plate rotary friction welding joints in 304 austenitic stainless steel |
| title_fullStr | Non-monotonic evolution of microstructure and fatigue properties of round bar–plate rotary friction welding joints in 304 austenitic stainless steel |
| title_full_unstemmed | Non-monotonic evolution of microstructure and fatigue properties of round bar–plate rotary friction welding joints in 304 austenitic stainless steel |
| title_short | Non-monotonic evolution of microstructure and fatigue properties of round bar–plate rotary friction welding joints in 304 austenitic stainless steel |
| title_sort | non monotonic evolution of microstructure and fatigue properties of round bar plate rotary friction welding joints in 304 austenitic stainless steel |
| topic | 304 stainless steels Round bar–plate type rotary friction welding Welding time Microstructure Fatigue life Fatigue crack initiation point |
| url | http://www.sciencedirect.com/science/article/pii/S0264127522010231 |
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