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Title: An investigation of the simultaneous spray deposition and peening of metals
Author: Ahmed, M. B.
Awarding Body: University College of Swansea
Current Institution: Swansea University
Date of Award: 1980
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Simultaneous spray deposition and peening of metals is a novel technique for building up thick, highly dense deposits strongly bonded to their substrates. The investigation is mainly concerned with the feasibility and potential of the technique employing a flame spraying method for deposition and an airless method for peening. The literature review is, therefore, taken from the fields of thermal spraying, shot peening and their derivatives. In the initial studies, a single-shot equipment was. used to study and provide quantitative information on the hot-deformation of either deposits on uncoated metals by the impact of single balls at high velocities. The data gained were used in constructing an equipment for the spray-peening technique. This equipment was used to produce either Al/Al, Al/mild steel or Cu/mild steel combinations. A detailed study was made of the porosity, structure and adhesion of these spray-peened deposits compared with those produced without employing the peening process, i.e. in the as-deposited condition. The total volume, size and distribution of pores were measured using a Q.T.M. whereas a S.E.M. and an optical microscope were used in studying the structure. The pull-off adhesion test method was used to determine the bond strength and an attempt was made to study the failure interfaces. The results indicate that the technique is capable of producing deposits having high density and cohesion, and reasonably good adhesion. It has considerable potential for development.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available