Effect of heat treatment on the microstructure and recrystallization of an SLM nickel-based superalloy
文献类型：期刊论文
| 作者 | Zhou, Shuheng1; Liu, Lirong1; Yang, Yanhong2; Lv, Peisen1 |
| 刊名 | MATERIALS TODAY COMMUNICATIONS
 |
| 出版日期 | 2024-06-01 |
| 卷号 | 39页码:12 |
| 关键词 | Nickel-based superalloy Selective laser melting Heat treatment Microstructure Recrystallization |
| DOI | 10.1016/j.mtcomm.2024.109253 |
| 通讯作者 | Liu, Lirong(lrliu@sut.edu.cn) ; Yang, Yanhong(yhyang@imr.ac.cn) |
| 英文摘要 | Heat treatment is essential for selective laser melting (SLM) of nickel-based superalloys. However, the conventional solution heat treatment method of cast superalloys usually leads to serious recrystallization in the samples. The recrystallized grain boundaries under high-temperature conditions reduce the strength of the alloy, which hinders their widespread applications in aerospace. In this work, a nickel-based superalloy with high gamma ' content fabricated by SLM was heat-treated at different solution temperatures. The microstructure of the alloy in different heat-treated states was also characterised. A sub-solvus heat treatment was proposed, which can effectively reduce residual stress and inhibit recrystallization. The microstructure showed that the dislocation density was significantly reduced and recrystallized after the solution heat treatment at 1285 degrees C/2 h+1290 degrees C/2 h+1295 degrees C/4 h and 1250 degrees C/0.5 h, and the proportion of recrystallization were 60.0 % and 42.9 %, respectively. However, after sub-solvus heat treatment at 1240 degrees C/0.5 h, the sample dislocation density decreased and the volume fraction of recrystallization (3.2 %) was slightly higher than that of the as-SLM sample (2.5 %). The sample maintained a strong cubic texture in the build direction. After sub-solvus + aging heat treatment, the microstructure maintained a columnar grain structure. The gamma/gamma ' interfacial dislocation networks and dislocations pile-up were the main dislocation configurations. |
| 资助项目 | National Science and Tech-nology Major Project[Y2019-VII-0011-0151] ; Science Center for Gas Turbine Project[HT-P2022-C-IV-002-001] |
| WOS研究方向 | Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001299007400001 |
| 出版者 | ELSEVIER |
| 资助机构 | National Science and Tech-nology Major Project ; Science Center for Gas Turbine Project |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Liu, Lirong; Yang, Yanhong |
| 作者单位 | 1.Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Liaoning, Peoples R China 2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Shuheng,Liu, Lirong,Yang, Yanhong,et al. Effect of heat treatment on the microstructure and recrystallization of an SLM nickel-based superalloy[J]. MATERIALS TODAY COMMUNICATIONS,2024,39:12. |
| APA | Zhou, Shuheng,Liu, Lirong,Yang, Yanhong,&Lv, Peisen.(2024).Effect of heat treatment on the microstructure and recrystallization of an SLM nickel-based superalloy.MATERIALS TODAY COMMUNICATIONS,39,12. |
| MLA | Zhou, Shuheng,et al."Effect of heat treatment on the microstructure and recrystallization of an SLM nickel-based superalloy".MATERIALS TODAY COMMUNICATIONS 39(2024):12. |
入库方式： OAI收割
来源：金属研究所
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