University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Experimental study of high velocity oxy-fuel sprayed WC-17Co coatings applied on complex geometries. Part A: Influence of kinematic spray parameters on thickness, porosity, residual stresses and microhardness

Katranidis, Vasileios, Gu, Sai, Allcock, B and Kamnis, S (2017) Experimental study of high velocity oxy-fuel sprayed WC-17Co coatings applied on complex geometries. Part A: Influence of kinematic spray parameters on thickness, porosity, residual stresses and microhardness Surface & Coatings Technology.

[img]
Preview
Text
1-s2.0-S0257897217300166-main.pdf - Version of Record

Download (2MB) | Preview
[img]
Preview
Text (licence)
SRI_deposit_agreement.pdf
Available under License : See the attached licence file.

Download (33kB) | Preview
[img] Text
Paper 1 Vasilis Katranidis.pdf - Accepted version Manuscript
Restricted to Repository staff only
Available under License : See the attached licence file.

Download (2MB)

Abstract

When a complex geometry is rotated in front of the thermal spray gun, the following kinematic parameters vary in a coupled fashion dictated by the geometry: Stand-off distance, spray angle and gun traverse speed. These fluctuations affect the conditions of particle impact with major implications on the coating’s properties. This work aims to probe into the interplay and isolated effect of these parameters on vital coating characteristics in applications requiring variable stand-off distance and spray angles. WC-17Co powders are sprayed via HVOF on steel substrates in a set of experiments that simulates the spray process of a non-circular cross section, while it allows for individual control of the kinematic parameters. Comprehensive investigation of their influence is made on deposition rate, residual stresses, porosity and microhardness of the final coating. It was determined that oblique spray angles and long stand-off distances compromise the coating properties but in some cases, the interplay of the kinematic parameters produced non-linear behaviours. Microhardness is related negatively with oblique spray angles at short distances while a positive correlation emerges as the stand-off distance is increased. Porosity and residual stresses are sensitive to the spray angle only in relatively short stand-off distances.

Item Type: Article
Subjects : Chemical & Process Engineering
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
NameEmailORCID
Katranidis, Vasileiosv.katranidis@surrey.ac.ukUNSPECIFIED
Gu, Saisai.gu@surrey.ac.ukUNSPECIFIED
Allcock, BUNSPECIFIEDUNSPECIFIED
Kamnis, SUNSPECIFIEDUNSPECIFIED
Date : 7 January 2017
Identification Number : 10.1016/j.surfcoat.2017.01.015
Copyright Disclaimer : © 2017. This manuscript version is made available under the CC-BY 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords : HVOF, WC-Co, deposition rate, residual stresses, porosity, microhardness
Depositing User : Symplectic Elements
Date Deposited : 11 Jan 2017 18:01
Last Modified : 19 Jul 2017 07:53
URI: http://epubs.surrey.ac.uk/id/eprint/813270

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800