Effect of Heat Treatment on Microstructure and Mechanical Properties of ODS Nickel-Based Superalloy via Strengthening Mechanism

被引：6
|
作者：
Wang, Guowei [1 ,2 ,3 ]
Huang, Lan [1 ,2 ,3 ]
Zhao, Pengyang [4 ]
Zhan, Xin [1 ,2 ,3 ]
Qin, Zijun [1 ,2 ,3 ]
He, Wuqiang [1 ,2 ,3 ]
Liu, Feng [1 ,2 ,3 ]
Nie, Yan [5 ]
机构：
[1] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
[2] Cent South Univ, Powder Met Res Inst, Changsha 410083, Peoples R China
[3] Cent South Univ, High Temp Mat Res Inst, Changsha 410083, Peoples R China
[4] Shanghai Jiao Tong Univ, Dept Engn Mech, 800 Dongchuan Rd, Shanghai 200240, Peoples R China
[5] Yuanmeng Precis Technol Shenzhen Inst, Shenzhen, Peoples R China
来源：
JOM | 2020年 / 72卷 / 09期
关键词：
FLOW-STRESS; PRECIPITATION; DISLOCATIONS; SIZE;
D O I：
10.1007/s11837-020-04220-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure and mechanical properties of oxide-dispersion-strengthened nickel-based superalloy (ODSN) are related to its thermal stability and pose an essential challenge in modeling. This study focuses on the relationship between the microstructure and yield strength of heat-treated ODSN. Through a comprehensive description of the microstructure as investigated by electron-backscatter diffraction analysis and transmission electron microscopy, the contributions to the yield strength arising from various strengthening mechanisms in heat-treated ODSN specimens are addressed. The yield strength calculated using the characterized microstructure parameters in combination with different strengthening models are compared with the measured yield strength. This comparison reveals that grain-boundary strengthening, followed by dispersion and dislocation strengthening, is the significant contributor, while a root-sum-square superposition model reproduces the measured yield strength of heat-treated ODSN within the experimental scatter.
引用
收藏
页码：3279 / 3287
页数：9
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