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Friction surfacing: A tool for surface crack repair
Surface & Coatings Technology ( IF 5.4 ) Pub Date : 2021-07-03 , DOI: 10.1016/j.surfcoat.2021.127482
R. Damodaram 1 , Pranav Rai 2 , S. Cyril Joseph Daniel 1 , Ranjit Bauri 3 , Devinder Yadav 2
Affiliation  

The present work demonstrates the feasibility of friction surfacing as a tool to repair surface cracks. An artificial crack, made on Inconel 718 plate was repaired by depositing a self-mating coating by friction surfacing. The crack was completely filled and the coating exhibited sound bonding with the substrate. For complete filling of the crack, the optimized process parameters depends on the crack dimensions. The coating microstructure was characterized by equiaxed fine grains with an average grain size of 1–3 μm and with a high fraction (>78%) of high angle grain boundaries. The microstructure in the coating evolves through dynamic recrystallization process, driven by combination of high strain rate and high temperature during friction surfacing. The method opens up a new way of repairing surface cracks and enhancing the service life of engineering components.



中文翻译:

摩擦堆焊:一种修复表面裂纹的工具

目前的工作证明了摩擦堆焊作为修复表面裂纹的工具的可行性。在 Inconel 718 板上制造的人工裂纹通过摩擦堆焊沉积自配合涂层进行修复。裂纹被完全填满,涂层与基体结合良好。为了完全填充裂纹,优化的工艺参数取决于裂纹尺寸。涂层显微组织的特征是等轴细晶粒,平均晶粒尺寸为 1-3 μm,并且具有高比例 (>78%) 的大角度晶界。在摩擦堆焊过程中高应变率和高温的共同驱动下,涂层中的微观结构通过动态再结晶过程演变。

更新日期:2021-07-23
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