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.

引用

页数：5

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