Atomic-scale insights into the strength and plasticity enhancement of Ni-based superalloys with refinement dispersion of precipitates

被引：0

作者：

Yin, Yihui ^{[1
]}

Lu, Shiqing ^{[1
]}

Wang, Lusheng ^{[1
]}

Song, Kun ^{[1
]}

Huang, Xia ^{[1
]}

Ding, Jun ^{[1
]}

Yan, Siliang ^{[2
]}

机构：

[1] School of Mechanical Engineering, Chongqing University of Technology, Banan,400054, China

[2] School of Materials Science and Engineering, Hefei University of Technology, Hefei,230009, China

来源：

Chemical Physics Letters | 2025年 / 861卷

基金：

中国国家自然科学基金;

关键词：

Brinell Hardness - Crack propagation - Dispersions - Plasticity - Stress concentration - Superalloys;

D O I：

10.1016/j.cplett.2024.141837

中图分类号：

学科分类号：

摘要：

The effect of dispersion distribution of the precipitated phase (γ’ phase) on strength and plasticity at atomic scale in Ni-based superalloys with 15 % volume fraction of γ’ phase and diameters of 10 and 30 nm at room-temperature were revealed by molecular dynamics simulation. The γ’ phase dispersion refinement can effectively suppress crack propagation, and enhances its strength and plasticity. The increased number of phase boundaries for dislocation nucleation has improved its strength. The small-sized γ’ phase boundaries promote dislocation nucleation and emission to reduce the stress concentration. Additionally, the competitive mechanism ISF and phase transition can further enhance the plasticity. © 2024

引用

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