Atomic simulation of crystal orientation effect on coating surface generation mechanisms in cold spray

[Display omitted] Cold spray (CS) as a new surface modification method is widely applied in improving surface quality. The effect of crystal orientation of powder particles on coating surface generation mechanisms in cold spray is systematically investigated by molecular dynamics (MD) simulations in...

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Published inComputational materials science Vol. 184; p. 109859
Main Authors Zhao, Pengyue, Zhang, Qi, Guo, Yongbo, Liu, Huan, Deng, Zongquan
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.11.2020
Subjects
Cold spray
Crystal orientation
Jetting
Molecular dynamics
Plastic deformation
Surface generation
Jetting
Molecular dynamics
Surface generation
Plastic deformation
Crystal orientation
Cold spray
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Summary:[Display omitted] Cold spray (CS) as a new surface modification method is widely applied in improving surface quality. The effect of crystal orientation of powder particles on coating surface generation mechanisms in cold spray is systematically investigated by molecular dynamics (MD) simulations in this work. The amorphization tendency and temperature distribution in the jetting region in our simulation are consistent with previous experimental results. In particular, our results show that crystal orientation affects the interactions between the powder particles and the surface of the substrate dramatically, leading to different atomic stress distribution, dislocation density evolution and microstructure evolution processes in the particle/substrate interface region for powder particles with different crystal orientations. The coating surface generation mechanism related to the slip plane system will be discussed.
ISSN:0927-0256
1879-0801
DOI:10.1016/j.commatsci.2020.109859