Early evolution of δ phase and coarse γ′ phase in Inconel 718 alloy with high temperature ageing

被引：38
作者：
Le, Wei [1 ,2 ]
Chen, Zhongwei [1 ]
Yan, Kang [1 ]
Naseem, Sufyan [1 ]
Zhao, Yanni [1 ]
Zhang, Haolan [1 ]
Zhang, Zhe [3 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China
[2] Langu Inst Mat Anal Co Ltd, Weihai 264207, Shandong, Peoples R China
[3] Xian Technol Univ, Sch Mat & Chem Engn, Xian 710021, Shaanxi, Peoples R China
来源：
MATERIALS CHARACTERIZATION | 2021年 / 180卷
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
Inconel; 718; alloy; delta phase; Coarse gamma ' phase; Hardness; DELTA-NI3NB PHASE; PRECIPITATION; NICKEL; DEFORMATION; BEHAVIOR; SHAPE;
D O I：
10.1016/j.matchar.2021.111403
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The early evolution of the delta phase and coarse gamma ' phase in aged Inconel 718 alloy was studied by transmission electron microscope. The results show that the needle-like delta phase first nucleates at the grain boundary and then grows into the grain interior. It is found that two delta phases with different orientations were combined to form one delta phase as the ageing time extended to 4 h. In addition, the delta phase maintains a good orientation relationship with the matrix during ageing. The coarse gamma ' phase nucleates at the dislocation, and the increase in size leads to the loss of coherence with the matrix, in which the strengthening effect is not obvious.
引用
收藏
页数：9
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