The Effect of Position of Materials on a Build Platform on the Hardness, Roughness, and Corrosion Resistance of Ti6Al4V Produced by DMLS Technology

Abstract

This article is focused on the effect of position on a build platform on the hardness, roughness and corrosion rate of parts (Ti6Al4V) produced by direct metal laser sintering (DMLS) technology. During the sintering process, the test samples were located at key positions—at the corners and in the middle of the build platform. An experimental program started with a microstructure investigation in two perpendicular directions in individual positions. The selected mechanical property—hardness—was investigated on metallographic cuts in both directions and all positions, and data sets underwent a statistical analysis (analysis of variance (ANOVA), t-test, F-test). The same procedure was repeated for an assessment of position effect to surface roughness (Kruskal–Wallis test) and material corrosion resistance. On the build platform, the course of hardness, roughness, and corrosion rate values that can be expected in individual positions was mapped in detail.

Benchmark Physical And Mechanical Property Chararacterization Of 316L Stainless Steel Dmls Prints

“…As such, macro-hardness is observed to be an anisotropic mechanical property. This agrees with hardness anisotropy in the literature [16].…”

Increasing Mechanical Properties of 3D Printed Samples by Direct Metal Laser Sintering Using Heat Treatment Process

“…In DMLS technology, metal powder of 20 microns, free of binder or fluxing agent, is completely melted by scanning using a high-performance laser beam to form a part with original material properties. Elimination of the polymeric binder avoids the burn-off and infiltration steps and produces 95% dense steel compared to about 70% density with selective laser sintering (SLS) [1][2][3][4][5][6][7][8][9][10].…”

“…An additional benefit of the DMLS process compared to SLS is higher detail resolution due to the use of thinner layers, enabled by a smaller powder diameter. This capability allows for more intricate part shapes [1][2][3][4][5][6][7][8]11]. Material options that are currently offered include alloy steel, stainless steel, tool steel, aluminum, bronze, cobalt-chrome, and titanium [3][4][5][6][7][8][9][10][11].…”

“…This capability allows for more intricate part shapes [1][2][3][4][5][6][7][8]11]. Material options that are currently offered include alloy steel, stainless steel, tool steel, aluminum, bronze, cobalt-chrome, and titanium [3][4][5][6][7][8][9][10][11]. The complexity of these parts has almost no effect on production time and costs with this technology.…”

Facile Preparation of Hierarchical Micro‐/Nanostructure Superhydrophobic Surface with Excellent Corrosion Resistance on Ti6Al4V‐Based Composite for Nuclear Fuel Reprocessing

“…In recent years, [ 1–4 ] due to the higher specific strength, greater mechanical properties, and more excellent corrosion resistance compared with stainless steel, titanium alloys, especially titanium matrix composites (TMCs), such as Ti6Al4V‐based composites, have been widely used for producing nuclear fuel reprocessing treatment vessels. [ 5–7 ] Generally, the nuclear fuel reprocessing reaction reagent contains HCl and HNO 3 . Moreover, due to the existence of F in uranium oxide and the strong electronegativity of F–, it is easy for the F‐ to combine with the H+ in HNO 3 , resulting in the formation of HF.…”