Friction studies of metal surfaces with various 3D printed patterns tested in dry sliding conditions

Abstract

In recent years, 3D scanning and printing of plastics has rapidly matured while printing of metallic parts is only gaining popularity due to required refinements of technology combined with cost- and resources effectiveness for the main components of printers and consumables. The 3D printing allows producing complicated shapes that can be hardly produced by conventional mechanical tools and can provide the functionalization of surfaces. In this work, several different stainless steel (AISI 316 L) surface patterns (flat, gecko’s fibrils, dimples, pyramids, mushrooms, mesh, brush, inclined brush) intended for controlling the coefficient of friction were printed with the help of a 3D metal printer by selective laser melting technique. Unidirectional sliding tests were performed with pin-on-disc configuration. Sliding velocity of 5 × 10−3 m/s and continuously increasing load ranged from 5 to 103 N has been applied in the course of “scanning” mode and accompanied by simultaneous recording of the coefficient of friction. A stainless steel (AISI 316) disc counterbody was used in this series of the tests. It was found that the 3D printed structures allow to control the value and stability of the coefficient of friction in a wide range of loads. Microstructural analysis of the worn samples was performed to support the conclusions regarding wear mechanism.

Hot Sliding Wear of 88 wt.% TiB–Ti Composite from SHS Produced Powders

“…), as well as mechanisms of tribo-layer formation. The running-in accompanied with formation of a characteristic tribo-layer is an essential process affecting the following steady state wear mechanism and the ultimate wear rate [ 27 ]. It is worth to note, that at 800 °C, a short running-in period was seen for both low and high sliding loads.…”

Selective Laser Melting of Diamond-Containing or Postnitrided Materials Intended for Impact-Abrasive Conditions: Experimental and Analytical Study

“…Postprocessing (nitriding or carburizing) can provide the increase in the Vickers hardness of metallic lattice structures up to 3 times [23]. Surface patterns of solid metallic structures have a significant role in controlling the friction coefficient [24]. erefore, a cross section of rods in both lattice structure and surface of solid structures are important in tribology.…”

Raman Spectroscopy for Reliability Assessment of Multilayered AlCrN Coating in Tribo-Corrosive Conditions

“…It was found that the AlCrN coating is performing sufficiently better than TiCN or TiAlN coatings deposited onto the same SS substrate and tested by authors under the same tribo-corrosive conditions that indicate its higher reliability as the coating for protection of a soft steel substrate that can be produced by 3D printing (additive manufacturing technology) [2]. These TiCN and TiAlN coatings failed during 2-h sliding test with 1 kg load while the AlCrN coating was providing sufficient resistance up to the end of 12-h test with 1 kg load and failed only after 20,000 s of sliding with 3 kg load.…”

“…Protection of the metal surfaces with physical vapour deposited coatings is a widely used technique. It could be assumed that such treatment will be even more relevant in future due to boosting of 3D metal printing technologies (additive manufacturing) [2]. Reliable lifetime prediction for a component used in an aqueous corrosive environment requires the identification of corrosion failure modes.…”