Abstract
The variation of adhesive bond strength of cold sprayed 7075 and 7050 aluminium alloy coatings on 7050-T7351 Al alloy substrate with coating thickness was determined through shear and tensile tests. Generally, without heating the substrate, the shear bond strength decreases with the increase in cold sprayed coating thickness. The thickest 7075 cold sprayed coating produced on rectangular substrates, which were used to measure the shear bond strength, was 1.6mm. Although thicker coating was produced on the end of the cylindrical substrates, which was used to measure the tensile bond strength in accordance with the ASTM C633 standard, increasing the coating thickness from 1.2mm to 2.9mm led to reduction in tensile bond strength from 10MPa to 5.1MPa. However, further increasing the coating thickness to 3.7mm improved the bond strength due to the heating effect resulted from impact of the late stage spray on the pre-formed coating layers. When the rectangular substrates were heated at 175°C during cold spray, not only much thicker coatings were produced, the shear bond strength was also significantly increased. Hence, heating cold sprayed substrate is considered as an effective approach to produce thick and highly bonded coatings.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
