Abstract
Selective laser melting (SLM) is a laser-based powder bed fusion additive manufacturing technique extensively used in industry. One of the most commonly used alloys in SLM process is Ti-6Al-4V. However, its tribological properties when coated with N ion implantation is not well understood. In the ion implantation process used in this study, N2+ and N+ are accelerated to the energy of 60 keV and implanted to a fluence of 6 × 1017 at.cm−2. The effect of N ion implanted layer in terms of hardness values and how this implanted layer may affect wear process and wear rate is investigated in this paper. Sliding wear tests were conducted on SLM and conventionally processed samples implanted with N ions, followed by examining the wear tracks and coefficient of friction in order to explain the wear rate data obtained. The results showed that N+ implantation increased hardness within the depth of ~200 nm and reduced wear rate in SLM samples, while N2+ was not beneficial.
Highlights
Metals 2021, 11, 1639. https://Powder bed fusion (PBF) additive manufacturing (AM), or 3D printing, is a recent advanced manufacturing process that has been widely used in various industries
In a laser based PBF technique or selective laser melting (SLM), a high energy laser beam scans the powder layer based on a sliced model of a computer-aided design (CAD) file
The results presented above shed(being light into mechanisms of ion implanted reasonable as microhardness of SLM
Summary
Metals 2021, 11, 1639. https://Powder bed fusion (PBF) additive manufacturing (AM), or 3D printing, is a recent advanced manufacturing process that has been widely used in various industries. In a laser based PBF technique or selective laser melting (SLM), a high energy laser beam scans the powder layer based on a sliced model of a CAD file. This results in rapid melting and solidification of the metallic powder. The non-fused metal powder remains in the build chamber and can be collected and reused for the manufacturing project. By using this laser beam welding process, it is possible to achieve a fully dense structure [6,7]
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