Slurry Erosion-Corrosion Characteristics of As-Built Ti-6Al-4V Manufactured by Selective Laser Melting.

Saleh Ahmed Aldahash,Osama Abdelaal,Yasser Abdelrhman

doi:10.3390/ma13183967

Saleh Ahmed Aldahash, Osama Abdelaal + Show 1 more

Open Access

https://doi.org/10.3390/ma13183967

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Abstract

Erosion and erosion–corrosion tests of as-built Ti-6Al-4V manufactured by Selective Laser Melting were investigated using slurries composed of SiO2 sand particles and either tap water (pure water) or 3.5% NaCl solution (artificial seawater). The microhardness value of selective laser melting (SLM)ed Ti-6Al-4V alloy increased as the impact angle increased. The synergistic effect of corrosion and erosion in seawater is always higher than erosion in pure water at all impact angles. The seawater environment caused the dissolution of vanadium oxide V2O5 on the surface of SLMed Ti-6Al-4V alloy due to the presence of Cl− ions in the seawater. These findings show lower microhardness values and high mass losses under the erosion–corrosion test compared to those under the erosion test at all impact angles.

Highlights

Ti-6Al-4V is the most broadly utilized titanium alloy as it currently covers about 50% of the worldwide production of titanium alloys [1,2,3]
In addition to its wide use in surgical instruments and medical implants, it is currently used as a material for aerospace components [7,8,9], marine and offshore components [1,10,11], oil and wastewater systems components [12,13,14], hydropower plant components [15,16,17], and architectural cladding and roofing [11]. These components are typically exposed to slurry erosion, where the working surfaces are continuously impacted by a stream of a slurry mixture
Central to the entire discipline of Ti-6Al-4V industrial slurry carrier applications is the investigation of its tribological behaviors, especially slurry erosion and corrosion

Summary

Introduction

Ti-6Al-4V is the most broadly utilized titanium alloy as it currently covers about 50% of the worldwide production of titanium alloys [1,2,3]. In addition to its wide use in surgical instruments and medical implants, it is currently used as a material for aerospace components (i.e., engine compressor blades and disks and helicopter rotor blades) [7,8,9], marine and offshore components (i.e., marine ship hulls, propellers, tubes, and shells) [1,10,11], oil and wastewater systems components (i.e., valves, pipelines, pipe fittings, and pumps) [12,13,14], hydropower plant components (i.e., turbine blades, pumps) [15,16,17], and architectural cladding and roofing [11] These components are typically exposed to slurry erosion, where the working surfaces are continuously impacted by a stream of a slurry mixture. Central to the entire discipline of Ti-6Al-4V industrial slurry carrier applications is the investigation of its tribological behaviors, especially slurry erosion and corrosion

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