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The Customized Heat Treatment for Enhancing the High-Temperature Durability of Laser-Directed Energy Deposition-Repaired Single-Crystal Superalloys

文献类型：期刊论文

作者Guo, Yimo1,2; Lu, Nannan2; Yang, Pengfei1,2; Liang, Jingjing2; Zhang, Guangrui2; Cui, Chuanyong2; Zhang, Ting-An3; Zhou, Yizhou2; Sun, Xiaofeng2; Li, Jinguo2
刊名MATERIALS
出版日期2024-11-01
卷号17期号:22页码:15
关键词single-crystal superalloy directed energy deposition heat treatment microstructure high-temperature durability microporous fracture
DOI10.3390/ma17225665
通讯作者Lu, Nannan(nnlu@imr.ac.cn) ; Li, Jinguo(jgli@imr.ac.cn)
英文摘要The high-temperature durability performance plays a crucial role in the applications of single-crystal (SX) superalloys repaired by laser-directed energy deposition (L-DED). A specialized heat treatment process for L-DED-repaired SX superalloys was developed in this study. The effect of the newly customized heat treatment on the microstructure and high-temperature mechanical properties of DD32 SX superalloy repaired by L-DED was investigated. Results indicate that the repaired area of the newly customized heat treatment specimen still maintained a SX structure, the average size of the gamma ' phase was 236 nm, and the volume fraction was 69%. Obviously recrystallized grains were formed in the repair area of the standard heat treatment specimens, and carbide precipitated along the grain boundary. The size of the gamma ' phase was about 535 nm. The high-temperature durable life of the newly custom heat treatment specimen was about 19.09 h at 1000 degrees C/280 MPa, the fracture mode was microporous aggregation fracture, and the fracture location was in the repair area. The durable life of the standard heat treatment specimen was about 8.70 h, the fracture mode was cleavage fracture, and the fracture location was in the matrix area. The crack source of both specimens was interdendrite carbide.
资助项目National Key Research and Development Program of China ; China Postdoctoral Science Foundation[2022M723211] ; [2023YFB4604000]
WOS研究方向Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
语种英语
WOS记录号WOS:001365607400001
出版者MDPI
资助机构National Key Research and Development 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; Li, Jinguo
作者单位1.Northeastern Univ, Sch Mat & Engn, Shenyang 110819, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
3.Northeastern Univ, Key Lab Ecol Utilizat Multimet Mineral, Minist Educ, Shenyang 110819, Peoples R China
推荐引用方式
GB/T 7714		 Guo, Yimo,Lu, Nannan,Yang, Pengfei,et al. The Customized Heat Treatment for Enhancing the High-Temperature Durability of Laser-Directed Energy Deposition-Repaired Single-Crystal Superalloys[J]. MATERIALS,2024,17(22):15.
APA Guo, Yimo.,Lu, Nannan.,Yang, Pengfei.,Liang, Jingjing.,Zhang, Guangrui.,...&Li, Jinguo.(2024).The Customized Heat Treatment for Enhancing the High-Temperature Durability of Laser-Directed Energy Deposition-Repaired Single-Crystal Superalloys.MATERIALS,17(22),15.
MLA Guo, Yimo,et al."The Customized Heat Treatment for Enhancing the High-Temperature Durability of Laser-Directed Energy Deposition-Repaired Single-Crystal Superalloys".MATERIALS 17.22(2024):15.

入库方式： OAI收割

来源：金属研究所

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