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

doi:10.3390/ma17225665

IMR OpenIR

	The Customized Heat Treatment for Enhancing the High-Temperature Durability of Laser-Directed Energy Deposition-Repaired Single-Crystal Superalloys
	Guo, Yimo 1,2; Lu, Nannan2 ; Yang, Pengfei 1,2; Liang, Jingjing 2; Zhang, Guangrui 2; Cui, Chuanyong 2; Zhang, Ting-An 3; Zhou, Yizhou 2; Sun, Xiaofeng 2; Li, Jinguo 2
通讯作者	Lu, Nannan(nnlu@imr.ac.cn) ; Li, Jinguo(jgli@imr.ac.cn)
	2024-11-01
发表期刊	MATERIALS
卷号	17 期号:22 页码:15
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.
关键词	single-crystal superalloy directed energy deposition heat treatment microstructure high-temperature durability microporous fracture
资助者	National Key Research and Development Program of China ; China Postdoctoral Science Foundation
DOI	10.3390/ma17225665
收录类别	SCI
语种	英语
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
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:001365607400001
出版者	MDPI
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/181541
专题	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.