Carbide precipitation in a Ni-based superalloy fabricated by DED and cast after long-term thermal exposure

被引：0
|
作者：
Zhang, Xue [1 ,2 ]
Liang, Jingjing [2 ]
Zhao, Yusong [1 ,3 ]
Mu, Yahang [1 ,2 ]
Zhang, Huan [2 ,3 ]
Li, Jinguo [2 ]
机构：
[1] Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
[3] Shenyang Aerosp Univ, Sch Mat Sci & Engn, Shenyang 110136, Peoples R China
来源：
MATERIALS LETTERS | 2025年 / 384卷
关键词：
Carbides; Microstructure stability; Ni-based superalloy; DED;
D O I：
10.1016/j.matlet.2025.138061
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The present work investigates the effect of carbide precipitation on microstructure stability in a Ni-based superalloy fabricated by directed energy deposition (DED) and cast. Long-term thermal exposure was employed for evaluating the microstructure stability. The results show that needle-like M6C carbides with the size of more than 15 mu m and rod-like MC carbides with the size of about 2 mu m are precipitated in cast, and DED Ni-based superalloy, respectively. These carbides are rich W, Mo, and Re. The microstructure stability of DED Ni-based superalloys is better due to less severe dendrite segregation. Ni-based superalloys fabricated by DED can accommodate more refractory elements. These results would offer a valuable reference for designing composition of DED Ni-based superalloys.
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页数：5
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