Detection of oxygen at the interface and its effect on strain, stress, and temperature at the interface between cold sprayed aluminum and steel substrate

KeeHyun Kim, Wenya Li, Xueping Guo

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Aluminum powder particles were deposited on medium carbon steel substrate by cold spraying process. High resolution observation showed that the particles were severely deformed in solid state, whereas the substrate was hardly deformed. Furthermore, the particles were not bonded intimately to the substrate, and most of all, oxygen as well as thin gap were clearly detected along the interface of particle/substrate. Based on the observations, the impacting behavior of a particle on a substrate as well as the influence of the oxide film was modeled. The oxides covering the surface of metallic powder particles and the substrate significantly affect the impact and deformation behaviors of particle and substrate, and consequently the values of strain, stress, and temperature at the interface in the numerical simulation.
Original languageEnglish
Pages (from-to)1720-1726
Number of pages7
JournalApplied Surface Science
Volume357
Early online date22 Oct 2015
DOIs
Publication statusPublished - 1 Dec 2015

Keywords

  • Cold spraying
  • Bonding formation
  • High resolution analysis
  • Oxide
  • Numerical simulation

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