Correlation of Residual Stresses and Coating Properties in Arc-Sprayed Coatings on Different Substrates for Maritime App
- PDF / 1,167,765 Bytes
- 11 Pages / 595.276 x 790.866 pts Page_size
- 113 Downloads / 181 Views
PEER REVIEWED
Correlation of Residual Stresses and Coating Properties in ArcSprayed Coatings on Different Substrates for Maritime Applications Miche´l Hauer1 • Sebastian Krebs2 • Werner Kroemmer3 • Knuth-Michael Henkel4
Submitted: 14 November 2019 / in revised form: 2 February 2020 Ó The Author(s) 2020
Abstract Arc spraying is a cost-effective technology, which is determined by a few key factors. It is already established for corrosion protection of large structures and thus considered for restoration of eroded ship rudders and propellers by depositing typical propeller materials. The main parameters like arc current, gas type/flow or process kinematics strongly influence the residual stresses in these coatings, which in turn affect coating properties. In past investigations, it was shown that this impact could be modified by using alternative gas mixtures or changing the heat input in the process. However, the mentioned studies neglect the influence of the substrate, since solely steel substrates were used. In consequence, propeller alloys CuAl9Ni5Fe4Mn (Ni-Al bronze) and CuMn13Al8Fe3Ni2 (Mn-Al bronze) were now arc-sprayed onto bronze substrates while using the same parameters and kinematics as
in the past. For reproducible results, the residual stresses within the coatings were measured by novel incremental hole drilling method based on electronic speckle pattern interferometry (ESPI) and correlated with the other coating properties. In comparison with spraying onto steel, the same conditions led to reduced Young’s moduli, lower tensile stresses and improved cavitation erosion resistance, while other properties like hardness and electrical conductivity showed varying trends. Keywords aluminum bronze cavitation-resistant coatings electronic speckle pattern interferometry marine components residual stress determination substrate coating interaction wire arc spray
Introduction This article is part of a special topical focus in the Journal of Thermal Spray Technology on Advanced Residual Stress Analysis in Thermal Spray and Cold Spray Processes. This issue was organized by Dr. Vladimir Luzin, Australian Centre for Neutron Scattering; Dr. Seiji Kuroda, National Institute of Materials Science; Dr. Shuo Yin, Trinity College Dublin; and Dr. Andrew Ang, Swinburne University of Technology. & Miche´l Hauer [email protected]; [email protected] 1
Fraunhofer Institute for Large Structures in Production Engineering IGP - Welding Engineering, Rostock, Germany
2
Helmut-Schmidt University, University of the Federal Armed Forces Hamburg - Material Science, Hamburg, Germany
3
Linde AG – Linde Gases Division, Unterschleissheim, Germany
4
Chair of Joining Technology, University of Rostock, Rostock, Germany
Propellers of high-speed ships experience severe damages by wear, which are mainly caused by corrosion and erosion within aggressive saltwater and dissolved sediments. In particular, cavitation erosion plays an important role regarding erosion (Ref 1). The phenomenon is describe
Data Loading...
