Extraordinary plastic behaviour of the γ′ precipitate in a directionally solidified nickel-based superalloy

被引：19
|
作者：
Zhang, Peng [1 ]
Ma, Lifeng [2 ]
Yang, Gongxian [3 ]
Song, Xiaolong [1 ]
机构：
[1] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian, Peoples R China
[2] Xi An Jiao Tong Univ, Dept Engn Mech, S&V Lab, Xian, Peoples R China
[3] Dongfang Turbine Co Ltd, Long Life High Temp Mat Key Lab Sichuan Prov, Deyang, Peoples R China
来源：
PHILOSOPHICAL MAGAZINE LETTERS | 2016年 / 96卷 / 01期
关键词：
Ni-based superalloy; precipitate; shear bands; dislocations; plasticity; TEMPERATURE; DEFORMATION; NI3AL; SUPERPLASTICITY; MICROSTRUCTURE; DEPENDENCE; ALLOYS; SLIP;
D O I：
10.1080/09500839.2015.1134832
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The deformation behaviour of the precipitate in a directionally solidified nickel-based superalloy is investigated using microscopic observations after tensile testing at room temperature. It is found that coarse precipitates (604nm) are sheared by strongly coupled dislocations, and some precipitates are elongated to approximately 3-6 times of their original lengths. It reveals that, at room temperature, the precipitate within the experimental superalloy has a significant plastic deformation capacity in comparison with Ni3Al bulk alloys. Based on the experimental observations, the extraordinary plastic behaviour of the precipitate is analysed.
引用
收藏
页码：19 / 26
页数：8
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