Influences of Heat Input on the Geometric Parameters and Element Distribution of CrMnFeCoNi High-Entropy Alloy Coating on Aluminum Alloy Using Laser Cladding

Laser cladding technology is usually employed to produce high-entropy alloy coatings. However, the thickness of coatings is normally up to a millimeter scale, which increased the consumption of laser energy and materials. In this work, a micron-scale coating of CrMnFeCoNi high-entropy alloy on Al alloy by using low-power laser cladding was proposed. The influences of heat input on the geometric parameters and element distribution of coating were studied in detail. The results showed that the effects of heat input on the depth, width and dilution ratio of coating were obvious. The greater the heat input, the greater the uniformity in the element distribution of coating. When the heat input of 2 J/mm was used, the element distribution in the coating was uniform. The above results feasibility confirmed low-power laser cladding of micron-scale coating of high-entropy alloy on aluminum alloy.