Thermal Stability of GH4065A Superalloy Based on Microstructural and Performance Evolution Following Long-Term Aging
文献类型：期刊论文
| 作者 | Bai, Yingbo1,2; Zhang, Rui2; Cui, Chuanyong2; Zhou, Yizhou2; Sun, Xiaofeng2 |
| 刊名 | METALS AND MATERIALS INTERNATIONAL
 |
| 出版日期 | 2023-08-27 |
| 页码 | 15 |
| 关键词 | Superalloy GH4065A Long-term aging Deformation and fracture M6C carbide |
| ISSN号 | 1598-9623 |
| DOI | 10.1007/s12540-023-01510-x |
| 通讯作者 | Zhang, Rui(rzhang@imr.ac.cn) ; Cui, Chuanyong(chycui@imr.ac.cn) |
| 英文摘要 | This study investigates the thermal stability of a GH4065A superalloy at intermediate temperatures by conducting long-term aging treatments for 100-6000 h at 700-800 degrees C. Secondary gamma'-phase coarsening and intergranular M6C carbide precipitation occurred during aging. The activation energy for secondary gamma'-phase coarsening was 259.89 +/- 25.45 kJ mol(-1), suggesting that this process was predominantly controlled by elemental diffusion. The tensile strength at a testing temperature of 700 degrees C was stably above 1200 MPa for the alloys aged at 700 degrees C but continuously declined as the aging temperature increased, with a direct correlation identified between the secondary gamma'-phase coarsening and strength reduction upon aging. Increasing the aging temperature transitioned the deformation mechanism from Orowan bowing around the gamma' phase to dislocation slip through the broadened matrix channels, leading to decreased strength. Long-term aging effectively eliminated intermediatetemperature intergranular brittle fracture. The elongation to failure at a testing temperature of 700 degrees C increased by approximately 35% after aging at 800 degrees C for 6000 h, attributed to grain-boundary diffusion of W and Mo and intragranular softening, which improved the deformation coordination ability at the grain boundaries. Finally, the precipitation of intergranular M6C particles after prolonged aging promoted plastic deformation via micropore aggregation. |
| 资助项目 | National Key R& D Program of China[2019YFA0705300] ; National Key R& D Program of China[2017YFA0700703] ; IMR Innovation Fund[2021-PY09] ; National Science and Technology Major Project of China[2019VI-0006-0120] ; Doctoral Start- up Foundation of Liaoning Province[2020-BS-007] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001063724600001 |
| 出版者 | KOREAN INST METALS MATERIALS |
| 资助机构 | National Key R& D Program of China ; IMR Innovation Fund ; National Science and Technology Major Project of China ; Doctoral Start- up Foundation of Liaoning Province |
| 源URL | [http://ir.imr.ac.cn/handle/321006/179216]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Zhang, Rui; Cui, Chuanyong |
| 作者单位 | 1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Bai, Yingbo,Zhang, Rui,Cui, Chuanyong,et al. Thermal Stability of GH4065A Superalloy Based on Microstructural and Performance Evolution Following Long-Term Aging[J]. METALS AND MATERIALS INTERNATIONAL,2023:15. |
| APA | Bai, Yingbo,Zhang, Rui,Cui, Chuanyong,Zhou, Yizhou,&Sun, Xiaofeng.(2023).Thermal Stability of GH4065A Superalloy Based on Microstructural and Performance Evolution Following Long-Term Aging.METALS AND MATERIALS INTERNATIONAL,15. |
| MLA | Bai, Yingbo,et al."Thermal Stability of GH4065A Superalloy Based on Microstructural and Performance Evolution Following Long-Term Aging".METALS AND MATERIALS INTERNATIONAL (2023):15. |
入库方式： OAI收割
来源：金属研究所
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