当前位置: X-MOL 学术Intermetallics › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Compression deformation behavior of silicide coating on Nb-Si based alloy
Intermetallics ( IF 4.4 ) Pub Date : 2022-06-02 , DOI: 10.1016/j.intermet.2022.107615
Yanqiang Qiao, Weiping Zhang, Wenxu Ran, Xiping Guo

The aim of this work is to investigate the compression deformation behavior of the Nb–Si based alloy with an Al–Y modified silicide coating at different conditions, including the height reduction, deformation temperature, strain rate and oxidation. The results showed that the silicide coating and substrate have a good coordinated deformation at a higher temperature or at a lower strain rate. While at a lower deformation temperature (1100 °C, 1200 °C) or a higher strain rate (0.005 s−1), the silicide coating shows a barrier effect on the deformation of substrate. At 1350 °C, the grains of NbSi2 phase in the coating were coarsened significantly. During the high temperature compression process, the coating can undergo a certain degree of plastic deformation, and NbSi2 phase in the coating would form sub-grain and a small amount of recrystallized grains. The crack initiation and propagation in the coating and substrate during compression deformation have also been discussed. The big cracks produced in the process of oxidation can be pressed gradually with the increase of the height reduction. The oxidation of the coating has no significant effect on the compressive properties of the alloy.



中文翻译:

Nb-Si基合金硅化物涂层的压缩变形行为,Nb-Si基合金硅化物涂层的压缩变形行为

The aim of this work is to investigate the compression deformation behavior of the Nb–Si based alloy with an Al–Y modified silicide coating at different conditions, including the height reduction, deformation temperature, strain rate and oxidation. The results showed that the silicide coating and substrate have a good coordinated deformation at a higher temperature or at a lower strain rate. While at a lower deformation temperature (1100 °C, 1200 °C) or a higher strain rate (0.005 s−1), the silicide coating shows a barrier effect on the deformation of substrate. At 1350 °C, the grains of NbSi2 phase in the coating were coarsened significantly. During the high temperature compression process, the coating can undergo a certain degree of plastic deformation, and NbSi2涂层中的相会形成亚晶粒和少量的再结晶晶粒。还讨论了压缩变形过程中涂层和基材中的裂纹萌生和扩展。氧化过程中产生的大裂纹可以随着高度降低的增加而逐渐被压制。涂层的氧化对合金的压缩性能没有显着影响。

,

这项工作的目的是研究具有 Al-Y 改性硅化物涂层的 Nb-Si 基合金在不同条件下的压缩变形行为,包括高度减少、变形温度、应变速率和氧化。结果表明,硅化物涂层和基体在较高温度或较低应变速率下具有良好的协调变形。而在较低的变形温度(1100°C,1200°C)或较高的应变率(0.005 s -1)下,硅化物涂层对基底的变形显示出阻挡作用。在1350 ℃时,涂层中NbSi 2相的晶粒明显粗化。在高温压缩过程中,涂层会发生一定程度的塑性变形,NbSi 2涂层中的相会形成亚晶粒和少量的再结晶晶粒。还讨论了压缩变形过程中涂层和基材中的裂纹萌生和扩展。氧化过程中产生的大裂纹可以随着高度降低的增加而逐渐被压制。涂层的氧化对合金的压缩性能没有显着影响。

更新日期:2022-06-04
down
wechat
bug