ANSTO Publications Online >
Journal Publications >
Journal Articles >

Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/8500

Title: Analysis of the residual stress and bonding mechanism in the cold spray technique using experimental and numerical methods
Authors: Saleh, M
Luzin, V
Spencer, K
Keywords: NEUTRON DIFFRACTION
RESIDUAL STRESSES
NUMERICAL SOLUTION
PHYSICAL PROPERTIES
SUBSTRATES
CLADDING
Issue Date: 15-Aug-2014
Publisher: Elsevier
Citation: Saleh, Michael, Luzin, Vladimir, & Spencer, Kevin. (2014). Analysis of the residual stress and bonding mechanism in the cold spray technique using experimental and numerical methods. Surface and Coatings Technology, 252, 15-28.
Abstract: In the current study, numerical solutions were used to simulate multi-particle deposition in the cold spray (CS) process, and to investigate some of the physical attributes of the deposition process of AA-6061-T6 particles deposited on an AA-6061-T6 substrate. Earlier experimental results are presented, with varying substrate and cladding combination; a subset of these results is analysed using single particle impact simulation, a more traditional approach in simulations of cold spray, and the smooth particle hydrodynamic (SPH) formulation to simulate multi-particle deposition. In a single particle impact simulation, a strong correlation between temperature and plastic deformation of the CS particles during the deposition process was found. The authors were able to correlate the onset of adiabatic shear instability with pronounced reduction in the flow stress with an inversely proportional relation exhibited for both temperature rise and plastic deformation. In the simulation of multiple particle impact, 400 particles, several bulk characteristics were extracted as through-thickness functions: density, equivalent plastic strain and stress profile. Stress profile from the simulation was contrasted against neutron diffraction measurements of residual stress, along with the analytical model of Tsui and Clyne, and is shown to achieve good correlation and providing validation of the results of simulations. Furthermore it was found that these stresses originate from a delicate balance between (a) the strain rate hardening and thermal softening and (b) the shot peening effects induced by the impact of CS particles. Analysis of particle morphologies in the simulation suggests a strong influence of temperature rise at the periphery of CS particles during deposition and dynamic recrystallization with the strong jetting of molten metal allowing for inter particle mixing and substrate adhesion. Copyright © 2017 Elsevier B.V.
URI: http://dx.doi.org/10.1016/j.surfcoat.2014.04.059
http://apo.ansto.gov.au/dspace/handle/10238/8500
ISSN: 0257-8972
Appears in Collections:Journal Articles

Files in This Item:

There are no files associated with this item.

Items in APO are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback