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Date of Publication:2022-10-06

Journal:材料科学与工艺

Affiliation of Author(s):能源与动力学院

Issue:2

Page Number:149-152

ISSN No.:1005-0299

Abstract:When high-speed particles are spraying the part with complex bend surface, the majority of particles will intrude and cut off the surface of the part in certain angle, Non-Vertical incidence particles will have an important influence on formation and characteristic of the coating. Based on developed numerical simulation method, the non-vertical impacting behavior of copper particles colliding copper substrate in process of transforming material property was investigated. The join strength, penetration depth and condition of emerging adiabatic shear instability were discussed with single particle of uniform speed and different angles. It is revealed that the deposit effect of cold spray is deteriorating in certain angle collision comparing with the ideal vertical collision; with the increasing incidence angle, the penetration depth of particles is decreased and the join strength is weakened, even can't be embeded into the substrate and leads to the disengagement. Adiabatic shear instability will take place when the normal component of particle velocity excesses critical value.

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