Effects of heat treatment process and hot isostatic pressing on microstructural evolution of high-niobium TiAl alloy
In this paper, the vacuum induction levitation melting method was adopted to prepare high-niobium TiAl-based alloys. The microstructure of the alloys was analyzed by means of optical microscopy, scanning electron microscopy, and other means, and the influence of heat treatment/hot isostatic pressing...
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AIP Publishing LLC
2025-03-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0257247 |
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| author | Ziqi Gong Ziyong Chen |
| author_facet | Ziqi Gong Ziyong Chen |
| author_sort | Ziqi Gong |
| collection | DOAJ |
| description | In this paper, the vacuum induction levitation melting method was adopted to prepare high-niobium TiAl-based alloys. The microstructure of the alloys was analyzed by means of optical microscopy, scanning electron microscopy, and other means, and the influence of heat treatment/hot isostatic pressing on the microstructure evolution of the alloys was studied. The research findings are as follows: During annealing at 1250 °C, with the increase in holding time, the content of the β phase in the alloy gradually decreased, while the number of α2 laths increased and the α2 lamellae became finer. After heat treatment at 1280 °C for 4 h, only a small amount of the β phase remained in the microstructure. When the holding time was increased to 8 h, the β phase in the alloy matrix was basically eliminated, and the size of the lamellar colonies in the microstructure increased. Hot isostatic pressing treatment at 1250 °C/200 MPa for 4 h could eliminate the β phase in the alloy, and both the grain size and the lamellar spacing of the alloy were significantly reduced compared with those after heat treatment at 1250 °C for 4 h. Hot isostatic pressing treatment at 1280 °C/200 MPa for 4 h could eliminate the β phase in the alloy while causing the α2 lamellae in the microstructure to coarsen. |
| format | Article |
| id | doaj-art-86e7d63dd4f94ac0a43e093aa356e724 |
| institution | DOAJ |
| issn | 2158-3226 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | AIP Publishing LLC |
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| series | AIP Advances |
| spelling | doaj-art-86e7d63dd4f94ac0a43e093aa356e7242025-08-20T03:03:07ZengAIP Publishing LLCAIP Advances2158-32262025-03-01153035151035151-710.1063/5.0257247Effects of heat treatment process and hot isostatic pressing on microstructural evolution of high-niobium TiAl alloyZiqi Gong0Ziyong Chen1School of Mechanical Engineering, Tianjin Sino-Gernan University of Applied Scientes, Tianjin 300350, ChinaSchool of Material science and Engineering, Beijing University of Technology, Beijing 100124, ChinaIn this paper, the vacuum induction levitation melting method was adopted to prepare high-niobium TiAl-based alloys. The microstructure of the alloys was analyzed by means of optical microscopy, scanning electron microscopy, and other means, and the influence of heat treatment/hot isostatic pressing on the microstructure evolution of the alloys was studied. The research findings are as follows: During annealing at 1250 °C, with the increase in holding time, the content of the β phase in the alloy gradually decreased, while the number of α2 laths increased and the α2 lamellae became finer. After heat treatment at 1280 °C for 4 h, only a small amount of the β phase remained in the microstructure. When the holding time was increased to 8 h, the β phase in the alloy matrix was basically eliminated, and the size of the lamellar colonies in the microstructure increased. Hot isostatic pressing treatment at 1250 °C/200 MPa for 4 h could eliminate the β phase in the alloy, and both the grain size and the lamellar spacing of the alloy were significantly reduced compared with those after heat treatment at 1250 °C for 4 h. Hot isostatic pressing treatment at 1280 °C/200 MPa for 4 h could eliminate the β phase in the alloy while causing the α2 lamellae in the microstructure to coarsen.http://dx.doi.org/10.1063/5.0257247 |
| spellingShingle | Ziqi Gong Ziyong Chen Effects of heat treatment process and hot isostatic pressing on microstructural evolution of high-niobium TiAl alloy AIP Advances |
| title | Effects of heat treatment process and hot isostatic pressing on microstructural evolution of high-niobium TiAl alloy |
| title_full | Effects of heat treatment process and hot isostatic pressing on microstructural evolution of high-niobium TiAl alloy |
| title_fullStr | Effects of heat treatment process and hot isostatic pressing on microstructural evolution of high-niobium TiAl alloy |
| title_full_unstemmed | Effects of heat treatment process and hot isostatic pressing on microstructural evolution of high-niobium TiAl alloy |
| title_short | Effects of heat treatment process and hot isostatic pressing on microstructural evolution of high-niobium TiAl alloy |
| title_sort | effects of heat treatment process and hot isostatic pressing on microstructural evolution of high niobium tial alloy |
| url | http://dx.doi.org/10.1063/5.0257247 |
| work_keys_str_mv | AT ziqigong effectsofheattreatmentprocessandhotisostaticpressingonmicrostructuralevolutionofhighniobiumtialalloy AT ziyongchen effectsofheattreatmentprocessandhotisostaticpressingonmicrostructuralevolutionofhighniobiumtialalloy |