Evolution of residual stress and microstructure in single crystal superalloys via directed energy deposition
文献类型：期刊论文
| 作者 | Guo, Yimo1,2,3; Lu, Nannan1; Yang, Yanhong1; Liang, Jingjing1; Zhang, Guangrui1; Li, Jinguo1; Zhou, Yizhou1; Sun, Xiaofeng1 |
| 刊名 | OPTICS AND LASER TECHNOLOGY
 |
| 出版日期 | 2025-08-01 |
| 卷号 | 186页码:12 |
| 关键词 | Residual stress Recrystallization Directed energy deposition Single crystal superalloy |
| ISSN号 | 0030-3992 |
| DOI | 10.1016/j.optlastec.2025.112775 |
| 通讯作者 | Lu, Nannan(nnlu@imr.ac.cn) ; Liang, Jingjing(jjliang@imr.ac.cn) |
| 英文摘要 | Residual stress (RS) was the main driving force for recrystallization during subsequent heat treatment in single crystal (SX) superalloys repaired by directed energy deposition (DED). Understanding RS distribution was the key to avoid recrystallization after heat treatment. In this work, a second-generation SX superalloy DD432 was investigated. Both the primary dendrite arm spacing (PDAS) increased and gamma ' coarsened gradually as the deposition proceeded, due to cooling rate diminution. Stray grains (SGs) and (gamma + gamma ') eutectic were detected in the middle and top regions. Along the build direction, the RS exhibited an increasing trend along with the deposition height, thanks to the layer-by-layer accumulation of RS during DED. Along the horizontal direction, RS distribution was symmetrical. Considering the uneven distribution of the temperature field at the fusion interface, there was compression RS near the edge of both ends, and tensile RS at the remaining positions, which presented an approximately M-shaped symmetrical distribution. The recrystallization distribution after high temperature annealing further verified the relationship between RS and deposition height. This work served as potential guidance for the additive repair of SX turbine blades and their post-treatment. |
| 资助项目 | National Key Research and Development Program[2023YFB4604000] ; Defense Industrial Tech-nology Development Program[JCKY2020130C024] ; Na-tional Key R & D Program of China[2017YFA0700704] ; China Postdoctoral Science Foundation[2022M723211] |
| WOS研究方向 | Optics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001445261900001 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | National Key Research and Development Program ; Defense Industrial Tech-nology Development Program ; Na-tional Key R & D Program of China ; China Postdoctoral Science Foundation |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Lu, Nannan; Liang, Jingjing |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Superalloys Div, Shenyang 110016, Liaoning, Peoples R China 2.Northeastern Univ, Sch Mat & Engn, Shenyang 110819, Liaoning, Peoples R China 3.Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110178, Liaoning, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Yimo,Lu, Nannan,Yang, Yanhong,et al. Evolution of residual stress and microstructure in single crystal superalloys via directed energy deposition[J]. OPTICS AND LASER TECHNOLOGY,2025,186:12. |
| APA | Guo, Yimo.,Lu, Nannan.,Yang, Yanhong.,Liang, Jingjing.,Zhang, Guangrui.,...&Sun, Xiaofeng.(2025).Evolution of residual stress and microstructure in single crystal superalloys via directed energy deposition.OPTICS AND LASER TECHNOLOGY,186,12. |
| MLA | Guo, Yimo,et al."Evolution of residual stress and microstructure in single crystal superalloys via directed energy deposition".OPTICS AND LASER TECHNOLOGY 186(2025):12. |
入库方式： OAI收割
来源：金属研究所
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