Mechanical Characteristics of Al-Co-Ce Coatings Produced by the Cold Spray Process

Abstract

Gas atomized feedstock particles of an Al-13Co-26Ce alloy system were sprayed using the Cold Spray deposition technique. The microstructures of the coatings produced are examined and the mechanical characteristics, in particular the bending fatigue and the bond strength, of the Al-Co-Ce coatings are reported. The results show that the Al-Co-Ce coatings improved the fatigue behavior of AA 2024-T3 specimens when compared to uncoated and Alclad specimens. During the bond strength tests, the bonding agent failed and no delamination of the coating from the substrate occurred. The microstructural features of the feedstock powder were also found in the coatings. It is suggested that the increase in the fatigue properties of the specimens can be attributed to the residual compressive stresses induced in the coatings and to the high adhesion strength of the coatings to the substrates.

Fatigue behavior of annealed cold-sprayed 316L stainless steel coating for biomedical applications

“…Unfortunately, there is very limited published literature on the fatigue behavior of cold-sprayed coatings [21][22][23]. Price et al have reported a decrease in fatigue resistance of Ti6Al4V alloy substrates when cold sprayed with pure titanium, and argued that the decrease may be explained by substrate-coating interface properties [22].…”

“…Price et al have reported a decrease in fatigue resistance of Ti6Al4V alloy substrates when cold sprayed with pure titanium, and argued that the decrease may be explained by substrate-coating interface properties [22]. Sansoucy et al [23] studied the influence of Al-Co-Ce alloy cold spray coating on the fatigue life of 2024 aluminum alloy substrate, and found notable improvement in the fatigue endurance limit. It was suggested that the increase in the fatigue behavior was attributed to the residual compressive stresses and to high bonding strength of the coatings to the substrate [23].…”

Deposition of metallic coatings on polymer surfaces using cold spray

“…On particle impact with the substrate, the high kinetic energy of the particles results in severe plastic deformation and the creation of a deposition layer. CS coatings typically show high bond strength and excellent mechanical characteristics, including metals of strong engineering interest such as aluminium, titanium and their alloys [6,7,8,9]. The deposition of thermoplastic powder has also been achieved onto metallic and non-metallic substrates [10].…”

Innovative technologies and methods of hardening dies for pressing hard-composite powder materials

“…В результате экспериментов были успешно нанесены покрытия практически из всех типов металлов (Al, Cu, Zn, Mo, Ta, Ti, Cr, Nb, Zr, Ag, Fe и многих других) и сплавов, широко применяющихся в промышлен-ности [16][17][18][19][20][21][22][23]. В качестве обобщающих характе-ристик ХГН покрытий можно выделить: 1) низкое в сравнении с другими способами порошкового напыления содержание оксидов;…”