Strength-hardness correlations of thermal-exposed oxide dispersion strengthened nickel-based superalloy with different grain size distributions
Strength-hardness correlations of thermal-exposed oxide dispersion strengthened nickel-based superalloy with different grain size distributions
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DOI：
10.1016/j.matchar.2021.111178
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发表时间：
2021-05
影响因子：
4.7
通讯作者：
Guowei Wang;Lan Huang;Xin Zhan;Liming Tan;Zijun Qin;Wuqiang He;Feng Liu
中科院分区：
文献类型：
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作者：
Guowei Wang;Lan Huang;Xin Zhan;Liming Tan;Zijun Qin;Wuqiang He;Feng Liu
The determination of mechanical properties of oxide dispersion strengthened (ODS) nickel-based superalloys has certain challenges because of the irradiation and high-temperatures in nuclear industry. In this study, the microstructure and mechanical properties of ODS nickel-based superalloy with different grain size distributions were investigated using electron backscatter diffraction, transmission electron microscopy, tensile strength, and Vickers hardness. Besides, the correlation of hardness and yield strength was obtained using thermal-exposed samples. The results showed that the relationship between the hardness and yield strength mainly came from microstructure and anisotropy, especially the grain size distributions, the texture, and the tested plane. This allowed Vickers hardness tests rather than the tensile tests to evaluate the changes in strength, which is especially useful for the study of thermal stability of ODS nickel-based superalloys in nuclear industry.
