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Characterization of Adhesion Strength and Residual Stresses of HVOF Sprayed Inconel 718 for Aerospace Repair Applications

Christophe Lyphout (Institutionen för material- och tillverkningsteknik) ; Per Nylén ; Jan Wigren
Proceedings of the International Thermal Spray Conference (ITSC), Beijing, China p. 588-593. (2007)
[Konferensbidrag, övrigt]

Thermally sprayed Inconel 718 coatings have been deposited by high velocity oxy-fuel (HVOF) spraying on Inconel 718 substrates. The aim of the on-going study is to understand and control the adhesion mechanisms and the residual stress state of the deposit/substrate system, in order to build up thick coatings for maintenance purposes. The coating adhesion strength was evaluated by the standard ASTM C633 tensile test. Coating shear strength was evaluated by the recently developed prEN15340 Shear Test. A modified Layer Removal Method (MLRM) test was carried out to measure residual stresses. The work is a part of an ongoing study for evaluation of relationships between process parameters, residual stress distribution and adhesion strength.

Nyckelord: Thermal Spray, HVOF Coatings, Thick Coatings, Characterization, Adhesion Strength, Residual Stresses



Denna post skapades 2008-11-13.
CPL Pubid: 77815