Fatigue property and failure mechanism of TC4 titanium alloy in the HCF and VHCF region considering different forging processes
Based on the self-built three point bending ultrasonic fatigue test system, fatigue behavior of TC4 titanium alloy after different forging processes in high cycle fatigue (HCF) and very high cycle fatigue (VHCF) regimes was discussed in this paper. The experimental results showed that the fatigue S-...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2021-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/abf765 |
| _version_ | 1827868993254326272 |
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| author | Wenbin Cui Xuan Chen Li Cheng Junliang Ding Changkai Wang Bohan Wang |
| author_facet | Wenbin Cui Xuan Chen Li Cheng Junliang Ding Changkai Wang Bohan Wang |
| author_sort | Wenbin Cui |
| collection | DOAJ |
| description | Based on the self-built three point bending ultrasonic fatigue test system, fatigue behavior of TC4 titanium alloy after different forging processes in high cycle fatigue (HCF) and very high cycle fatigue (VHCF) regimes was discussed in this paper. The experimental results showed that the fatigue S-N curves of TC4 titanium alloy with three different structures presented different characteristics: continuous decline; double platform; linear decline. The fatigue property of TC4 titanium alloy is closely related to the content of primary α phase and β -transformed microstructure. For TC4 titanium alloy, grain refinement and certain volume fraction of the primary α phase contributed to enhancing fatigue property. The fatigue performance of bimodal structure by near β forging was obviously better than two structures by α + β forging in HCF and VHCF regime. It was found that failure mode shifted from the surface at relatively high stress to the subsurface at relatively low stress. For three kinds of structures, crack initiations were observed at the surfaces of specimens in HCF regime. Meanwhile, cracks of the three structures all originated from primary α cleavage planes in the interior. The fatigue life of VHCF is dominated by the crack initiation stage. |
| first_indexed | 2024-03-12T15:39:55Z |
| format | Article |
| id | doaj.art-1ee407981f82431e9fee1f833fcf0000 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:39:55Z |
| publishDate | 2021-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-1ee407981f82431e9fee1f833fcf00002023-08-09T16:02:02ZengIOP PublishingMaterials Research Express2053-15912021-01-018404652410.1088/2053-1591/abf765Fatigue property and failure mechanism of TC4 titanium alloy in the HCF and VHCF region considering different forging processesWenbin Cui0https://orcid.org/0000-0002-8816-3140Xuan Chen1Li Cheng2Junliang Ding3Changkai Wang4https://orcid.org/0000-0001-7590-3368Bohan Wang5https://orcid.org/0000-0003-2424-1880Aeronautics Engineering College, Air Force Engineering University , Xi’an, People’s Republic of ChinaAeronautics Engineering College, Air Force Engineering University , Xi’an, People’s Republic of ChinaAeronautics Engineering College, Air Force Engineering University , Xi’an, People’s Republic of ChinaAeronautics Engineering College, Air Force Engineering University , Xi’an, People’s Republic of ChinaAeronautics Engineering College, Air Force Engineering University , Xi’an, People’s Republic of ChinaAeronautics Engineering College, Air Force Engineering University , Xi’an, People’s Republic of ChinaBased on the self-built three point bending ultrasonic fatigue test system, fatigue behavior of TC4 titanium alloy after different forging processes in high cycle fatigue (HCF) and very high cycle fatigue (VHCF) regimes was discussed in this paper. The experimental results showed that the fatigue S-N curves of TC4 titanium alloy with three different structures presented different characteristics: continuous decline; double platform; linear decline. The fatigue property of TC4 titanium alloy is closely related to the content of primary α phase and β -transformed microstructure. For TC4 titanium alloy, grain refinement and certain volume fraction of the primary α phase contributed to enhancing fatigue property. The fatigue performance of bimodal structure by near β forging was obviously better than two structures by α + β forging in HCF and VHCF regime. It was found that failure mode shifted from the surface at relatively high stress to the subsurface at relatively low stress. For three kinds of structures, crack initiations were observed at the surfaces of specimens in HCF regime. Meanwhile, cracks of the three structures all originated from primary α cleavage planes in the interior. The fatigue life of VHCF is dominated by the crack initiation stage.https://doi.org/10.1088/2053-1591/abf765TC4 titanium alloyforging processesVHCFcrack initiation mechanism |
| spellingShingle | Wenbin Cui Xuan Chen Li Cheng Junliang Ding Changkai Wang Bohan Wang Fatigue property and failure mechanism of TC4 titanium alloy in the HCF and VHCF region considering different forging processes Materials Research Express TC4 titanium alloy forging processes VHCF crack initiation mechanism |
| title | Fatigue property and failure mechanism of TC4 titanium alloy in the HCF and VHCF region considering different forging processes |
| title_full | Fatigue property and failure mechanism of TC4 titanium alloy in the HCF and VHCF region considering different forging processes |
| title_fullStr | Fatigue property and failure mechanism of TC4 titanium alloy in the HCF and VHCF region considering different forging processes |
| title_full_unstemmed | Fatigue property and failure mechanism of TC4 titanium alloy in the HCF and VHCF region considering different forging processes |
| title_short | Fatigue property and failure mechanism of TC4 titanium alloy in the HCF and VHCF region considering different forging processes |
| title_sort | fatigue property and failure mechanism of tc4 titanium alloy in the hcf and vhcf region considering different forging processes |
| topic | TC4 titanium alloy forging processes VHCF crack initiation mechanism |
| url | https://doi.org/10.1088/2053-1591/abf765 |
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