Document Type
Journal Article
Publication Title
Surface and Coatings Technology
Publisher
Elsevier BV
School
School of Engineering
RAS ID
28375
Funders
China Postdoctoral Science Foundation
Science and Technology Support Program of Jiangsu Province
National Natural Science Foundation of China
Abstract
Although considerable endeavors have been dedicated to investigate the microstructures of the remelting-enhanced NiCrBSi coatings, the textures in the remelted coatings, which may result in property anisotropy, are rarely studied. In this work, the recrystallized fractions, grain orientations and interphase boundaries for Ni, Ni3B and CrB in a plasma sprayed-remelted NiCrBSi coating were investigated by electron backscatter diffraction. The results demonstrate that the texture is induced by phase interaction during solidification. Cooling from the liquid, the firstly formed Ni grains possess a cube fiber texture of {001}〈001〉. The successively formed Ni3B colonies are randomly oriented and keep specific orientation relationships with the surrounding Ni grains, resulting in formation of some weak texture components of Ni. The finally formed CrB grains have a considerably high frequency (40.8%) of lattice correlation boundary of (002)Ni//(040)CrB, but no specific orientation relationships with Ni3B grains. Hence, the interaction of Ni and CrB grains leads to the formation of more texture components of Ni. As such, the phase interaction induced texture forms in the remelted NiCrBSi coating. This work would give an insight into the anisotropy in the remelted NiCrBSi coatings and provide a theoretical basis of further optimizing the remelting process technologies.
DOI
10.1016/j.surfcoat.2018.11.019
Comments
This is an Author's Accepted Manuscript of:
Chen, L. Y., Xu, T., Wang, H., Sang, P., Lu, S., Wang, Z. X., ... & Zhang, L. C. (2019). Phase interaction induced texture in a plasma sprayed-remelted NiCrBSi coating during solidification: An electron backscatter diffraction study. Surface and Coatings Technology, 358, 467-480.
https://doi.org/10.1016/j.surfcoat.2018.11.019