NUMERICAL INVESTIGATION ON ENERGY BALANCE AND DEPOSITION BEHAVIOR DURING COLD SPRAYING
Received date: 2009-09-16
Revised date: 2010-03-18
Online published: 2010-04-11
Supported by
Supported by National Natural Science Foundation of China (Nos.50871019 and 50874009)
In this paper, the physical process during the impact of a cold spraying spherical particle with an infinite homogencous substrate was simulated using the finite element method (FEM). The effects of the impact vlocity, the particle and substrate materials on thimpact bebvior were invesigated. The results show that a significant amount of the initial total kinetic energy of the particle is dissipated due to the plastc deformation of particle and substrate, finally transforming to ther nternal energies. An energy partition coefficient K, defined as the ratio of the enegies distributed in the particle and substrate, has been introduced, which is closely related to the iniiatotakinetic enery of the particle and the deformability of the particle and substratduring the impactIt is fond that it is difficult to make a particle with hight K and a substrate with low K cohere strongly.
ZHOU Xiang-Lin , WU Xiang-Kun , YU Jian-Guo , ZHANG Ji-Shan . NUMERICAL INVESTIGATION ON ENERGY BALANCE AND DEPOSITION BEHAVIOR DURING COLD SPRAYING[J]. Acta Metall Sin, 2010 , 46(4) : 385 -389 . DOI: 10.3724/SP.J.1037.2009.00620
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