Effect of initial heat treatment of A390 alloy on microstructure and tribological behavior of friction surfaced coating

In this study, the effect of the A390 alloy consumable rod's three preprocessing heat treatment conditions (homogenization, solid solution, and artificial aging treatment) on the microstructural evolution, mechanical properties, and wear resistance of the friction surfaced coating applied on a commercially pure aluminum alloy substrate was investigated. The results showed that friction surfacing using artificially aged and solid solutiontreated consumable rods results in minimum (3.45 +/- 0.35 mu m) and maximum (5.63 +/- 0.25 mu m) coating grain sizes, respectively. Friction surfacing using artificially aged treated consumable rods results in smaller, more uniformly distributed Si particles in the coating microstructure. The [111] and [101] directions of most grains in the consumable rod and coating are parallel to the consumable rod axial axis and surfacing direction, respectively. Recrystallization texture components, including Goss and Cube-Twin, are observed in coatings. Compared to the other consumable rods, the coatings fabricated using artificially aged treated consumable rod result in highest hardness (117.62 +/- 9.58 HV0.1), maximum bond strength (13.98 +/- 1.02 kN), and lowest wear rate (5.6 +/- 0.8 mu g/m).