Effects of hot isostatic pressing temperature on casting shrinkage densification and microstructure of Ti6Al4V alloy
The Ti6Al4V alloy castings were produced by the investment casting process, and the hot isostatic pressing (HIP) was used to remove shrinkage from castings. The processing pressure and holding time for HIP were 150 MPa and 20 min, respectively. Four different HIP temperatures were tested, including...
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| Format: | Article |
| Language: | English |
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Foundry Journal Agency
2017-11-01
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| Series: | China Foundry |
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| Online Access: | http://ff.foundryworld.com/uploadfile/2017110133154505.pdf |
| _version_ | 1811306915994533888 |
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| author | Qian Xu Jian-xin Zhou Hai Nan |
| author_facet | Qian Xu Jian-xin Zhou Hai Nan |
| author_sort | Qian Xu |
| collection | DOAJ |
| description | The Ti6Al4V alloy castings were produced by the investment casting process, and the hot isostatic pressing (HIP) was used to remove shrinkage from castings. The processing pressure and holding time for HIP were 150 MPa and 20 min, respectively. Four different HIP temperatures were tested, including 750 ºC, 850 ºC, 920 ºC and 950 ºC. To evaluate the effects of temperature on densification and microstructure of Ti6Al4V alloy treated by HIP, non-destructive testing and metallographic observation was performed. The experimental results show that the shrinkage was completely closed at 920 ºC and 950 ºC. The densification of Ti6Al4V alloy increased as the HIP temperature increased below 920 ºC. The lamellae were more uniform, the thickness of lamellae was obviously broadened and the structure was coarsen. Besides, the Norton creep equation was used to simulate the effect of different temperatures on the densification of Ti6Al4V alloy during HIP. The simulation results were in good agreement with the experimental results. It was also found that 920 ºC is a suitable temperature for HIP for Ti6Al4V alloy. |
| first_indexed | 2024-04-13T08:54:11Z |
| format | Article |
| id | doaj.art-29317e500d6a49de98c35fb1fb7532bd |
| institution | Directory Open Access Journal |
| issn | 1672-6421 1672-6421 |
| language | English |
| last_indexed | 2024-04-13T08:54:11Z |
| publishDate | 2017-11-01 |
| publisher | Foundry Journal Agency |
| record_format | Article |
| series | China Foundry |
| spelling | doaj.art-29317e500d6a49de98c35fb1fb7532bd2022-12-22T02:53:22ZengFoundry Journal AgencyChina Foundry1672-64211672-64212017-11-0114542943410.1007/s41230-017-7178-8Effects of hot isostatic pressing temperature on casting shrinkage densification and microstructure of Ti6Al4V alloyQian Xu0Jian-xin Zhou1Hai Nan2State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaState Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaBeijing Institute of Aeronautical Materials, Aviation Industry of China, Beijing 100095, ChinaThe Ti6Al4V alloy castings were produced by the investment casting process, and the hot isostatic pressing (HIP) was used to remove shrinkage from castings. The processing pressure and holding time for HIP were 150 MPa and 20 min, respectively. Four different HIP temperatures were tested, including 750 ºC, 850 ºC, 920 ºC and 950 ºC. To evaluate the effects of temperature on densification and microstructure of Ti6Al4V alloy treated by HIP, non-destructive testing and metallographic observation was performed. The experimental results show that the shrinkage was completely closed at 920 ºC and 950 ºC. The densification of Ti6Al4V alloy increased as the HIP temperature increased below 920 ºC. The lamellae were more uniform, the thickness of lamellae was obviously broadened and the structure was coarsen. Besides, the Norton creep equation was used to simulate the effect of different temperatures on the densification of Ti6Al4V alloy during HIP. The simulation results were in good agreement with the experimental results. It was also found that 920 ºC is a suitable temperature for HIP for Ti6Al4V alloy.http://ff.foundryworld.com/uploadfile/2017110133154505.pdfTi6Al4V alloyhot isostatic pressingtemperaturecasting shrinkagedensificationmicrostructure |
| spellingShingle | Qian Xu Jian-xin Zhou Hai Nan Effects of hot isostatic pressing temperature on casting shrinkage densification and microstructure of Ti6Al4V alloy China Foundry Ti6Al4V alloy hot isostatic pressing temperature casting shrinkage densification microstructure |
| title | Effects of hot isostatic pressing temperature on casting shrinkage densification and microstructure of Ti6Al4V alloy |
| title_full | Effects of hot isostatic pressing temperature on casting shrinkage densification and microstructure of Ti6Al4V alloy |
| title_fullStr | Effects of hot isostatic pressing temperature on casting shrinkage densification and microstructure of Ti6Al4V alloy |
| title_full_unstemmed | Effects of hot isostatic pressing temperature on casting shrinkage densification and microstructure of Ti6Al4V alloy |
| title_short | Effects of hot isostatic pressing temperature on casting shrinkage densification and microstructure of Ti6Al4V alloy |
| title_sort | effects of hot isostatic pressing temperature on casting shrinkage densification and microstructure of ti6al4v alloy |
| topic | Ti6Al4V alloy hot isostatic pressing temperature casting shrinkage densification microstructure |
| url | http://ff.foundryworld.com/uploadfile/2017110133154505.pdf |
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