Effect of Deformation Parameters on Thermomechanical Behaviour of GH500 Superalloy
Different parameters such as deformation temperature and deformation rate were set for thermal compression tests， using the Thermecmastor-Z thermal simulation testing machine. The stress-strain curves and metallographic structures were analyzed to systematically study the high-temperature thermal de...
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Editorial Office of Special Steel
2025-05-01
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| Series: | Teshugang |
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| Online Access: | https://www.specialsteeljournal.com/fileup/1003-8620/PDF/2024-00270.pdf |
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| author | Fu Hao, Wang Minshi, Dai Pengchao |
| author_facet | Fu Hao, Wang Minshi, Dai Pengchao |
| author_sort | Fu Hao, Wang Minshi, Dai Pengchao |
| collection | DOAJ |
| description | Different parameters such as deformation temperature and deformation rate were set for thermal compression tests， using the Thermecmastor-Z thermal simulation testing machine. The stress-strain curves and metallographic structures were analyzed to systematically study the high-temperature thermal deformation behavior and morphological evolution of the GH500 superalloy. The results showed that the stress-strain curves exhibited characteristics of work hardening， dynamic recovery， and dynamic recrystallization， with stress significantly increasing as the deformation temperature decreased and the deformation rate increased. At a deformation rate of 1 s-1， as the deformation temperature increased， the microstructure of the alloy evolved from deformed grains and small clusters of grains into fully recrystallized grains. When the deformation temperature was ≥1 130 ℃， the volume fraction and size of the dynamic recrystallized grains of the alloy significantly increased with the rise in deformation rate. At a deformation temperature of 1 180 ℃ and a deformation rate of 1 s-1， the alloy underwent complete dynamic recrystallization with no deformed grains， resulting in fine and uniform grains. Based on the stress-strain curves and microstructural evolution obtained from hot compression tests， suitable forging processes have been explored. The heating temperature was set between 1 130 ℃ and 1 150 ℃， and the reduction speed was 10 mm/s to 15 mm/s with the deformation rate betweem 0.04s-1 and 0.06 s-1 during the forging process. The produced disc alloy exhibit a basically uniform grain structure. After standard heat treatment， the room temperature tensile strength， hardness， and high-temperature durability of disc alloy meet the standard requirements. |
| format | Article |
| id | doaj-art-8bc4d9129fc44db9be4566b3168ce4b2 |
| institution | OA Journals |
| issn | 1003-8620 |
| language | zho |
| publishDate | 2025-05-01 |
| publisher | Editorial Office of Special Steel |
| record_format | Article |
| series | Teshugang |
| spelling | doaj-art-8bc4d9129fc44db9be4566b3168ce4b22025-08-20T02:32:25ZzhoEditorial Office of Special SteelTeshugang1003-86202025-05-0146310210510.20057/j.1003-8620.2024-00270Effect of Deformation Parameters on Thermomechanical Behaviour of GH500 SuperalloyFu Hao, Wang Minshi, Dai Pengchao0（Technology Center， Baowu Special Metallury Co.， Ltd.， Shanghai 200940，China）Different parameters such as deformation temperature and deformation rate were set for thermal compression tests， using the Thermecmastor-Z thermal simulation testing machine. The stress-strain curves and metallographic structures were analyzed to systematically study the high-temperature thermal deformation behavior and morphological evolution of the GH500 superalloy. The results showed that the stress-strain curves exhibited characteristics of work hardening， dynamic recovery， and dynamic recrystallization， with stress significantly increasing as the deformation temperature decreased and the deformation rate increased. At a deformation rate of 1 s-1， as the deformation temperature increased， the microstructure of the alloy evolved from deformed grains and small clusters of grains into fully recrystallized grains. When the deformation temperature was ≥1 130 ℃， the volume fraction and size of the dynamic recrystallized grains of the alloy significantly increased with the rise in deformation rate. At a deformation temperature of 1 180 ℃ and a deformation rate of 1 s-1， the alloy underwent complete dynamic recrystallization with no deformed grains， resulting in fine and uniform grains. Based on the stress-strain curves and microstructural evolution obtained from hot compression tests， suitable forging processes have been explored. The heating temperature was set between 1 130 ℃ and 1 150 ℃， and the reduction speed was 10 mm/s to 15 mm/s with the deformation rate betweem 0.04s-1 and 0.06 s-1 during the forging process. The produced disc alloy exhibit a basically uniform grain structure. After standard heat treatment， the room temperature tensile strength， hardness， and high-temperature durability of disc alloy meet the standard requirements.https://www.specialsteeljournal.com/fileup/1003-8620/PDF/2024-00270.pdfdeformation temperature； deformation rate； dynamic recrystallization； microstructure |
| spellingShingle | Fu Hao, Wang Minshi, Dai Pengchao Effect of Deformation Parameters on Thermomechanical Behaviour of GH500 Superalloy Teshugang deformation temperature； deformation rate； dynamic recrystallization； microstructure |
| title | Effect of Deformation Parameters on Thermomechanical Behaviour of GH500 Superalloy |
| title_full | Effect of Deformation Parameters on Thermomechanical Behaviour of GH500 Superalloy |
| title_fullStr | Effect of Deformation Parameters on Thermomechanical Behaviour of GH500 Superalloy |
| title_full_unstemmed | Effect of Deformation Parameters on Thermomechanical Behaviour of GH500 Superalloy |
| title_short | Effect of Deformation Parameters on Thermomechanical Behaviour of GH500 Superalloy |
| title_sort | effect of deformation parameters on thermomechanical behaviour of gh500 superalloy |
| topic | deformation temperature； deformation rate； dynamic recrystallization； microstructure |
| url | https://www.specialsteeljournal.com/fileup/1003-8620/PDF/2024-00270.pdf |
| work_keys_str_mv | AT fuhaowangminshidaipengchao effectofdeformationparametersonthermomechanicalbehaviourofgh500superalloy |