Study on grain growth behavior of new Ni-based powder metallurgy superalloys
The grain growth behavior of the fourth generation powder metallurgy (PM) superalloys was studied. The results indicate that the grain growth range is small when the heat treatment temperature is below the γ′ solution temperature, which is similar to the initial microstructure (as-forged, 3~4 μm). H...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Powder Metallurgy Technology
2023-10-01
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| Series: | Fenmo yejin jishu |
| Subjects: | |
| Online Access: | https://pmt.ustb.edu.cn/article/doi/10.19591/j.cnki.cn11-1974/tf.2023060001 |
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| _version_ | 1846169217769930752 |
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| author | ZHANG Ming TIAN Tian WANG Yixing LIU Jiantao |
| author_facet | ZHANG Ming TIAN Tian WANG Yixing LIU Jiantao |
| author_sort | ZHANG Ming |
| collection | DOAJ |
| description | The grain growth behavior of the fourth generation powder metallurgy (PM) superalloys was studied. The results indicate that the grain growth range is small when the heat treatment temperature is below the γ′ solution temperature, which is similar to the initial microstructure (as-forged, 3~4 μm). However, the grain size greatly increases to 30~40 μm when the heat treatment temperature exceeds the γ′ solution temperature, and there is little difference in grain size at the several temperatures over the γ′ solution temperature. The grain size increases significantly at the initial stage of heat treatment, and no longer changes after a certain holding time. The influence of temperature and time on grain size is related to the pinning effect of γ′ on grain boundary migration. A new model is established by modifying the parameters such as the activation energy for boundary migration (Q), the time exponent (n), and the generalized mobility constant (A0) based on the traditional grain growth model. The determination coefficient (R2) and the mean-square error (MSE) between the predicted and the experimental values are 0.9997 and 0.12 μm, respectively, showing the high prediction accuracy, and the various characteristics of the grain growth curves can also be predicted accurately. |
| format | Article |
| id | doaj-art-b32cd0c56a5e4c3998e06b68d2314dea |
| institution | Kabale University |
| issn | 1001-3784 |
| language | zho |
| publishDate | 2023-10-01 |
| publisher | Editorial Office of Powder Metallurgy Technology |
| record_format | Article |
| series | Fenmo yejin jishu |
| spelling | doaj-art-b32cd0c56a5e4c3998e06b68d2314dea2024-11-13T05:52:41ZzhoEditorial Office of Powder Metallurgy TechnologyFenmo yejin jishu1001-37842023-10-0141542743310.19591/j.cnki.cn11-1974/tf.2023060001Study on grain growth behavior of new Ni-based powder metallurgy superalloysZHANG Ming0TIAN Tian1WANG Yixing2LIU Jiantao3GAONA Aero Material Co., Ltd., Beijing 100081, ChinaGAONA Aero Material Co., Ltd., Beijing 100081, ChinaGAONA Aero Material Co., Ltd., Beijing 100081, ChinaGAONA Aero Material Co., Ltd., Beijing 100081, ChinaThe grain growth behavior of the fourth generation powder metallurgy (PM) superalloys was studied. The results indicate that the grain growth range is small when the heat treatment temperature is below the γ′ solution temperature, which is similar to the initial microstructure (as-forged, 3~4 μm). However, the grain size greatly increases to 30~40 μm when the heat treatment temperature exceeds the γ′ solution temperature, and there is little difference in grain size at the several temperatures over the γ′ solution temperature. The grain size increases significantly at the initial stage of heat treatment, and no longer changes after a certain holding time. The influence of temperature and time on grain size is related to the pinning effect of γ′ on grain boundary migration. A new model is established by modifying the parameters such as the activation energy for boundary migration (Q), the time exponent (n), and the generalized mobility constant (A0) based on the traditional grain growth model. The determination coefficient (R2) and the mean-square error (MSE) between the predicted and the experimental values are 0.9997 and 0.12 μm, respectively, showing the high prediction accuracy, and the various characteristics of the grain growth curves can also be predicted accurately.https://pmt.ustb.edu.cn/article/doi/10.19591/j.cnki.cn11-1974/tf.2023060001powder metallurgy superalloyssolution heat treatmentgrain growthprediction model |
| spellingShingle | ZHANG Ming TIAN Tian WANG Yixing LIU Jiantao Study on grain growth behavior of new Ni-based powder metallurgy superalloys Fenmo yejin jishu powder metallurgy superalloys solution heat treatment grain growth prediction model |
| title | Study on grain growth behavior of new Ni-based powder metallurgy superalloys |
| title_full | Study on grain growth behavior of new Ni-based powder metallurgy superalloys |
| title_fullStr | Study on grain growth behavior of new Ni-based powder metallurgy superalloys |
| title_full_unstemmed | Study on grain growth behavior of new Ni-based powder metallurgy superalloys |
| title_short | Study on grain growth behavior of new Ni-based powder metallurgy superalloys |
| title_sort | study on grain growth behavior of new ni based powder metallurgy superalloys |
| topic | powder metallurgy superalloys solution heat treatment grain growth prediction model |
| url | https://pmt.ustb.edu.cn/article/doi/10.19591/j.cnki.cn11-1974/tf.2023060001 |
| work_keys_str_mv | AT zhangming studyongraingrowthbehaviorofnewnibasedpowdermetallurgysuperalloys AT tiantian studyongraingrowthbehaviorofnewnibasedpowdermetallurgysuperalloys AT wangyixing studyongraingrowthbehaviorofnewnibasedpowdermetallurgysuperalloys AT liujiantao studyongraingrowthbehaviorofnewnibasedpowdermetallurgysuperalloys |