Eliminating embrittlement of GH4065A superalloy at intermediate temperature by a novel grain boundary strengthening mechanism

被引：4
|
作者：
Bai, Yingbo [1 ,2 ]
Zhang, Rui [1 ]
Cui, Chuanyong [1 ]
Zhou, Yizhou [1 ]
Sun, Xiaofeng [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
[2] Univ Sci & Technol China, Sch Mat Sci & Engn, 96 Jinzhai Rd, Hefei 230026, Peoples R China
来源：
MATERIALS LETTERS | 2023年 / 335卷
关键词：
Superalloy GH4065A; Embrittlement; Long -term aging; Deformation and fracture; Diffusion; NI; MICROSTRUCTURE;
D O I：
10.1016/j.matlet.2022.133798
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Intermediate temperature embrittlement (ITE) exists widely in Ni-based superalloys, which seriously restricts the processing and service properties of alloys. The ITE of a Ni-based wrought superalloy GH4065A was eliminated by long-term aging treatment. With the extension of aging time, the fracture characteristics of the alloy changed from intergranular fracture to dimple. EDS and AES observations showed that the intergranular diffusion and segregation of W and Mo elements increased the grain boundary strength of the long-term aging alloy. Intergranular M6C carbide precipitates have also been shown to be beneficial for plastic deformation.
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页数：5
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