Deformation mechanism and microstructure evolution of hot extruded GH738 alloy fabricated by spray forming
The research on hot deformation including flow behavior, microstructure evolution via EBSD method and the constitutive characteristic model of hot extruded GH738 alloy fabricated by spray forming was conducted by using Gleeble-3500TM simulator at the temperature range of 950~1150 ℃, strain rate rang...
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| Format: | Article |
| Language: | zho |
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Journal of Aeronautical Materials
2020-04-01
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| Series: | Journal of Aeronautical Materials |
| Subjects: | |
| Online Access: | http://jam.biam.ac.cn/article/doi/10.11868/j.issn.1005-5053.2019.000085 |
| _version_ | 1819320260250042368 |
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| author | WANG Yue XU Wenyong LIU Na ZHENG Liang YUAN Hua LI Zhou ZHANG Guoqing |
| author_facet | WANG Yue XU Wenyong LIU Na ZHENG Liang YUAN Hua LI Zhou ZHANG Guoqing |
| author_sort | WANG Yue |
| collection | DOAJ |
| description | The research on hot deformation including flow behavior, microstructure evolution via EBSD method and the constitutive characteristic model of hot extruded GH738 alloy fabricated by spray forming was conducted by using Gleeble-3500TM simulator at the temperature range of 950~1150 ℃, strain rate range of 0.001~1 s–1 and engineering strain of 50%. The results show that the flow stress decreases with increasing of the deformation temperature and decreasing of the strain rate. The peak flow stress of coarse grain GH738 is higher than that of fine grain within the extruded GH738 alloy. The activation energy Q of extruded GH738 alloy is 651.08 kJ·mol–1. The hot deformation activation energy Q of GH738 alloy is tending to increasing with the decreasing of the original average grain size. The microstructure evolutes from original stretched grain to equiaxed grain with the increasing deformation temperature through the onset of recrystallization. The full dynamic recrystallization microstructure is obtained at the temperature above 1000 ℃ and the microstructure tend to coarsen with the higher deformation temperature. |
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| institution | Directory Open Access Journal |
| issn | 1005-5053 1005-5053 |
| language | zho |
| last_indexed | 2024-12-24T11:16:45Z |
| publishDate | 2020-04-01 |
| publisher | Journal of Aeronautical Materials |
| record_format | Article |
| series | Journal of Aeronautical Materials |
| spelling | doaj.art-8aedc5e811ab4c5b99571b520de8c1da2022-12-21T16:58:21ZzhoJournal of Aeronautical MaterialsJournal of Aeronautical Materials1005-50531005-50532020-04-014021710.11868/j.issn.1005-5053.2019.0000852019-0085Deformation mechanism and microstructure evolution of hot extruded GH738 alloy fabricated by spray formingWANG Yue0XU Wenyong1LIU Na2ZHENG Liang3YUAN Hua4LI Zhou5ZHANG Guoqing6Science and Technology on Advanced High Temperature Structural Materials Laboratory，AECC Beijing Institute of Aeronautical Materials，Beijing 100095，ChinaScience and Technology on Advanced High Temperature Structural Materials Laboratory，AECC Beijing Institute of Aeronautical Materials，Beijing 100095，ChinaScience and Technology on Advanced High Temperature Structural Materials Laboratory，AECC Beijing Institute of Aeronautical Materials，Beijing 100095，ChinaScience and Technology on Advanced High Temperature Structural Materials Laboratory，AECC Beijing Institute of Aeronautical Materials，Beijing 100095，ChinaScience and Technology on Advanced High Temperature Structural Materials Laboratory，AECC Beijing Institute of Aeronautical Materials，Beijing 100095，ChinaScience and Technology on Advanced High Temperature Structural Materials Laboratory，AECC Beijing Institute of Aeronautical Materials，Beijing 100095，ChinaScience and Technology on Advanced High Temperature Structural Materials Laboratory，AECC Beijing Institute of Aeronautical Materials，Beijing 100095，ChinaThe research on hot deformation including flow behavior, microstructure evolution via EBSD method and the constitutive characteristic model of hot extruded GH738 alloy fabricated by spray forming was conducted by using Gleeble-3500TM simulator at the temperature range of 950~1150 ℃, strain rate range of 0.001~1 s–1 and engineering strain of 50%. The results show that the flow stress decreases with increasing of the deformation temperature and decreasing of the strain rate. The peak flow stress of coarse grain GH738 is higher than that of fine grain within the extruded GH738 alloy. The activation energy Q of extruded GH738 alloy is 651.08 kJ·mol–1. The hot deformation activation energy Q of GH738 alloy is tending to increasing with the decreasing of the original average grain size. The microstructure evolutes from original stretched grain to equiaxed grain with the increasing deformation temperature through the onset of recrystallization. The full dynamic recrystallization microstructure is obtained at the temperature above 1000 ℃ and the microstructure tend to coarsen with the higher deformation temperature.http://jam.biam.ac.cn/article/doi/10.11868/j.issn.1005-5053.2019.000085gh738 superalloyspray forminghot extrusionconstitutive modelrecrystallization microstructure |
| spellingShingle | WANG Yue XU Wenyong LIU Na ZHENG Liang YUAN Hua LI Zhou ZHANG Guoqing Deformation mechanism and microstructure evolution of hot extruded GH738 alloy fabricated by spray forming Journal of Aeronautical Materials gh738 superalloy spray forming hot extrusion constitutive model recrystallization microstructure |
| title | Deformation mechanism and microstructure evolution of hot extruded GH738 alloy fabricated by spray forming |
| title_full | Deformation mechanism and microstructure evolution of hot extruded GH738 alloy fabricated by spray forming |
| title_fullStr | Deformation mechanism and microstructure evolution of hot extruded GH738 alloy fabricated by spray forming |
| title_full_unstemmed | Deformation mechanism and microstructure evolution of hot extruded GH738 alloy fabricated by spray forming |
| title_short | Deformation mechanism and microstructure evolution of hot extruded GH738 alloy fabricated by spray forming |
| title_sort | deformation mechanism and microstructure evolution of hot extruded gh738 alloy fabricated by spray forming |
| topic | gh738 superalloy spray forming hot extrusion constitutive model recrystallization microstructure |
| url | http://jam.biam.ac.cn/article/doi/10.11868/j.issn.1005-5053.2019.000085 |
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