High Temperature Fatigue Behavior and Failure Mechanism of Ti-45Al-4Nb-1Mo-0.15B Alloy
Strain-controlled low cycle fatigue experiments were carried out on the TiAl alloy Ti-45Al-4Nb-1Mo-0.15B at 400 °C and 750 °C to reveal the cyclic mechanical behavior and failure mechanism. The TiAl alloy presents stable cyclic characteristics under fatigue loading at elevated temperatures. No obvio...
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| Format: | Article |
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MDPI AG
2022-11-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/12/11/1669 |
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| author | Kanghe Jiang Wei Li Jingwei Chen Li Ma Wu Zeng Junjie Yang |
| author_facet | Kanghe Jiang Wei Li Jingwei Chen Li Ma Wu Zeng Junjie Yang |
| author_sort | Kanghe Jiang |
| collection | DOAJ |
| description | Strain-controlled low cycle fatigue experiments were carried out on the TiAl alloy Ti-45Al-4Nb-1Mo-0.15B at 400 °C and 750 °C to reveal the cyclic mechanical behavior and failure mechanism. The TiAl alloy presents stable cyclic characteristics under fatigue loading at elevated temperatures. No obvious cyclic softening or cyclic hardening was manifested during experiments. The cyclic stress–strain relationship is well described by the Ramberg–Osgood equation. The fatigue lifetime at different temperatures has a log-linear relationship with the total strain ranges. The fracture morphology indicates the main fracture mode of fatigue specimens at 400 °C is a brittle fracture, while there is a ductile fracture at 750 °C. Meanwhile, the trans-lamellar fracture is dominant for the lamellar microstructure and the percentages of the inter-lamellar fracture decreases with the strain amplitude. |
| first_indexed | 2024-03-09T18:24:58Z |
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| id | doaj.art-f57007e1abc84586aa70c6f3182a46e1 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-09T18:24:58Z |
| publishDate | 2022-11-01 |
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| series | Crystals |
| spelling | doaj.art-f57007e1abc84586aa70c6f3182a46e12023-11-24T08:02:44ZengMDPI AGCrystals2073-43522022-11-011211166910.3390/cryst12111669High Temperature Fatigue Behavior and Failure Mechanism of Ti-45Al-4Nb-1Mo-0.15B AlloyKanghe Jiang0Wei Li1Jingwei Chen2Li Ma3Wu Zeng4Junjie Yang5Hunan Aviation Powerplant Research Institute, Aero Engine (Group) Corporation of China, Zhuzhou 412002, ChinaHunan Aviation Powerplant Research Institute, Aero Engine (Group) Corporation of China, Zhuzhou 412002, ChinaHunan Aviation Powerplant Research Institute, Aero Engine (Group) Corporation of China, Zhuzhou 412002, ChinaHunan Aviation Powerplant Research Institute, Aero Engine (Group) Corporation of China, Zhuzhou 412002, ChinaInstitute of Engineering Thermophysics, Chinses Academy of Sciences, Beijing 100083, ChinaInstitute for Aero Engine, Tsinghua University, Beijing 100084, ChinaStrain-controlled low cycle fatigue experiments were carried out on the TiAl alloy Ti-45Al-4Nb-1Mo-0.15B at 400 °C and 750 °C to reveal the cyclic mechanical behavior and failure mechanism. The TiAl alloy presents stable cyclic characteristics under fatigue loading at elevated temperatures. No obvious cyclic softening or cyclic hardening was manifested during experiments. The cyclic stress–strain relationship is well described by the Ramberg–Osgood equation. The fatigue lifetime at different temperatures has a log-linear relationship with the total strain ranges. The fracture morphology indicates the main fracture mode of fatigue specimens at 400 °C is a brittle fracture, while there is a ductile fracture at 750 °C. Meanwhile, the trans-lamellar fracture is dominant for the lamellar microstructure and the percentages of the inter-lamellar fracture decreases with the strain amplitude.https://www.mdpi.com/2073-4352/12/11/1669TiAl alloystrain-controlled fatigue behaviorcyclic stress–strain relationshipfailure mechanismfracture morphology |
| spellingShingle | Kanghe Jiang Wei Li Jingwei Chen Li Ma Wu Zeng Junjie Yang High Temperature Fatigue Behavior and Failure Mechanism of Ti-45Al-4Nb-1Mo-0.15B Alloy Crystals TiAl alloy strain-controlled fatigue behavior cyclic stress–strain relationship failure mechanism fracture morphology |
| title | High Temperature Fatigue Behavior and Failure Mechanism of Ti-45Al-4Nb-1Mo-0.15B Alloy |
| title_full | High Temperature Fatigue Behavior and Failure Mechanism of Ti-45Al-4Nb-1Mo-0.15B Alloy |
| title_fullStr | High Temperature Fatigue Behavior and Failure Mechanism of Ti-45Al-4Nb-1Mo-0.15B Alloy |
| title_full_unstemmed | High Temperature Fatigue Behavior and Failure Mechanism of Ti-45Al-4Nb-1Mo-0.15B Alloy |
| title_short | High Temperature Fatigue Behavior and Failure Mechanism of Ti-45Al-4Nb-1Mo-0.15B Alloy |
| title_sort | high temperature fatigue behavior and failure mechanism of ti 45al 4nb 1mo 0 15b alloy |
| topic | TiAl alloy strain-controlled fatigue behavior cyclic stress–strain relationship failure mechanism fracture morphology |
| url | https://www.mdpi.com/2073-4352/12/11/1669 |
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