Abstract
In recent years, additive manufacturing technologies have become increasingly widespread with the most intensive development being direct metal deposition (DMD), alloys, and ceramic materials on a metal substrate. This study shows the possibilities of the effective formation of coatings, based on heterogeneous metal alloys (Ni-based alloy and Fe-Al bronze) deposited onto 1045 structural steel. Changes in the microhardness, the microstructure, and the tribological properties of the composite coating, depending on the laser spot speed and pitch during DMD processing, have been considered. It was revealed that if the components of the composite coating are chosen correctly, there are possible DMD conditions ensuring reliable and durable connection between them and with the substrate.
Highlights
El Cheikh et al [2] investigated the process of the direct laser fabrication (DLF) of products made of 316 L steel, studying, for example, the effect on the laser spot speed and the different laser shift-distances between two successive layers
Yu et al [5] completed an analysis of the resistance to cracking and the microstructure and mechanical properties of elements produced with stainless steels by the laser metal deposition (LMD) method
Yu et al [6] investigated elements of different wall thicknesses produced by LMD similar to the 718 alloy and compared the structure of the material with that produced by traditional methods
Summary
Choi and Chang [1] studied the direct metal deposition (DMD) process of H13 steel and the characteristics of the products. El Cheikh et al [2] investigated the process of the direct laser fabrication (DLF) of products made of 316 L steel, studying, for example, the effect on the laser spot speed and the different laser shift-distances between two successive layers. Gharbi et al [4] studied the DMD process of a Ti-based alloy and revealed the outcome of laser beam power, laser spot speed, and powder flow on changes of the geometry and structure of the element. Yu et al [6] investigated elements of different wall thicknesses produced by LMD similar to the 718 alloy and compared the structure of the material with that produced by traditional methods. Govekar et al [8]
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