Fatigue Crack Initiation and Growth Behaviors of Additively Manufactured Ti-6AI-4V Alloy After Hot Isostatic Pressing Post-Process
In this study, the fatigue crack initiation and growth behaviors of an additively manufactured (AM) Ti-6AI-4V alloy were investigated, and its prospect for fatigue applications was evaluated. The AM specimens were first fabricated by selective laser melting (SLM) and then underwent a cycle of anneal...
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MDPI AG
2024-11-01
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| Online Access: | https://www.mdpi.com/2075-4701/14/12/1350 |
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| author | Tao Zang Ying Gao Yuan Zhao Pengfei Yang Shiju E Yang Liu Jun Liang Ye Zhang Jiazhen Zhang |
| author_facet | Tao Zang Ying Gao Yuan Zhao Pengfei Yang Shiju E Yang Liu Jun Liang Ye Zhang Jiazhen Zhang |
| author_sort | Tao Zang |
| collection | DOAJ |
| description | In this study, the fatigue crack initiation and growth behaviors of an additively manufactured (AM) Ti-6AI-4V alloy were investigated, and its prospect for fatigue applications was evaluated. The AM specimens were first fabricated by selective laser melting (SLM) and then underwent a cycle of annealing at 800 °C for 2 h and hot isostatic pressing (HIP) treatment at 920 °C/150 MPa/3 h followed by surface machining. Prefabricated spherical defects with different diameters (1.0 mm and 2.0 mm) were introduced to examine the efficacy of HIP treatment for eliminating the built defects. Both fracture morphology and microstructure were characterized to reveal the failure mechanism of these tested specimens. The results suggest that both the fatigue lives and fatigue crack growth resistances of most SLM+HIP-processed specimens are much higher than those of traditional wrought material, thus highlighting that the AM Ti-6AI-4V alloy can be a better candidate for future fatigue applications. However, due to the large variability in fatigue performance, the current SLM+HIP-processed Ti-6Al-4V alloy still cannot meet the demand for high safety and reliability. |
| format | Article |
| id | doaj-art-9414ae0ca3084b5ea8636d516c2683ee |
| institution | OA Journals |
| issn | 2075-4701 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
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| series | Metals |
| spelling | doaj-art-9414ae0ca3084b5ea8636d516c2683ee2025-08-20T02:00:43ZengMDPI AGMetals2075-47012024-11-011412135010.3390/met14121350Fatigue Crack Initiation and Growth Behaviors of Additively Manufactured Ti-6AI-4V Alloy After Hot Isostatic Pressing Post-ProcessTao Zang0Ying Gao1Yuan Zhao2Pengfei Yang3Shiju E4Yang Liu5Jun Liang6Ye Zhang7Jiazhen Zhang8Key Laboratory of Urban Rail Transit Intelligent Operation and Maintenance Technology & Equipment of Zhejiang Province, Zhejiang Normal University, Jinhua 321004, ChinaKey Laboratory of Urban Rail Transit Intelligent Operation and Maintenance Technology & Equipment of Zhejiang Province, Zhejiang Normal University, Jinhua 321004, ChinaKey Laboratory of Urban Rail Transit Intelligent Operation and Maintenance Technology & Equipment of Zhejiang Province, Zhejiang Normal University, Jinhua 321004, ChinaKey Laboratory of Urban Rail Transit Intelligent Operation and Maintenance Technology & Equipment of Zhejiang Province, Zhejiang Normal University, Jinhua 321004, ChinaKey Laboratory of Urban Rail Transit Intelligent Operation and Maintenance Technology & Equipment of Zhejiang Province, Zhejiang Normal University, Jinhua 321004, ChinaSchool of Mathematical Sciences, Zhejiang Normal University, Jinhua 321004, ChinaInstitute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 102488, ChinaBeijing Aeronautical Science & Technology Research Institute (BASTRI), Commercial Aircraft Corporation of China, Beijing 100094, ChinaBeijing Aeronautical Science & Technology Research Institute (BASTRI), Commercial Aircraft Corporation of China, Beijing 100094, ChinaIn this study, the fatigue crack initiation and growth behaviors of an additively manufactured (AM) Ti-6AI-4V alloy were investigated, and its prospect for fatigue applications was evaluated. The AM specimens were first fabricated by selective laser melting (SLM) and then underwent a cycle of annealing at 800 °C for 2 h and hot isostatic pressing (HIP) treatment at 920 °C/150 MPa/3 h followed by surface machining. Prefabricated spherical defects with different diameters (1.0 mm and 2.0 mm) were introduced to examine the efficacy of HIP treatment for eliminating the built defects. Both fracture morphology and microstructure were characterized to reveal the failure mechanism of these tested specimens. The results suggest that both the fatigue lives and fatigue crack growth resistances of most SLM+HIP-processed specimens are much higher than those of traditional wrought material, thus highlighting that the AM Ti-6AI-4V alloy can be a better candidate for future fatigue applications. However, due to the large variability in fatigue performance, the current SLM+HIP-processed Ti-6Al-4V alloy still cannot meet the demand for high safety and reliability.https://www.mdpi.com/2075-4701/14/12/1350additive manufacturingTi-6Al-4Vfatiguecrack growthhot isostatic pressing |
| spellingShingle | Tao Zang Ying Gao Yuan Zhao Pengfei Yang Shiju E Yang Liu Jun Liang Ye Zhang Jiazhen Zhang Fatigue Crack Initiation and Growth Behaviors of Additively Manufactured Ti-6AI-4V Alloy After Hot Isostatic Pressing Post-Process Metals additive manufacturing Ti-6Al-4V fatigue crack growth hot isostatic pressing |
| title | Fatigue Crack Initiation and Growth Behaviors of Additively Manufactured Ti-6AI-4V Alloy After Hot Isostatic Pressing Post-Process |
| title_full | Fatigue Crack Initiation and Growth Behaviors of Additively Manufactured Ti-6AI-4V Alloy After Hot Isostatic Pressing Post-Process |
| title_fullStr | Fatigue Crack Initiation and Growth Behaviors of Additively Manufactured Ti-6AI-4V Alloy After Hot Isostatic Pressing Post-Process |
| title_full_unstemmed | Fatigue Crack Initiation and Growth Behaviors of Additively Manufactured Ti-6AI-4V Alloy After Hot Isostatic Pressing Post-Process |
| title_short | Fatigue Crack Initiation and Growth Behaviors of Additively Manufactured Ti-6AI-4V Alloy After Hot Isostatic Pressing Post-Process |
| title_sort | fatigue crack initiation and growth behaviors of additively manufactured ti 6ai 4v alloy after hot isostatic pressing post process |
| topic | additive manufacturing Ti-6Al-4V fatigue crack growth hot isostatic pressing |
| url | https://www.mdpi.com/2075-4701/14/12/1350 |
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