Improving fatigue performance of additively manufactured Ti-6Al-4V using sulfur-based self-terminating etching processes

Raikar, Subbarao; DiGregorio, Steven; Agnani, Milan; Hommer, Garrison M.; Hildreth, Owen

doi:10.1016/j.addma.2022.103331

Cited by 1 publication

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“…Understanding the corrosion kinetics of sulfur-metal systems is of great interest for preventing or mitigating the detrimental effects of corrosion in industries such as oil and gas power plants [1,2]. Corrosion kinetics are also of interest to the Additive Manufacturing (AM) industry, which uses controlled corrosion to remove metal support structures and improve the surface finish and fatigue performance of printed parts [3][4][5][6]. The Hildreth Group recently developed techniques that use sulfidizing corrosive environments for post-processing additively manufactured Ti-6Al-4V (Ti64) parts [5].…”

Section: Introductionmentioning

confidence: 99%

Sulfidation kinetics of titanium and Ti-6Al-4V with elemental sulfur

Raikar

DiGregorio

Hildreth

2023

Corrosion Engineering, Science and Technology

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The sulfidation kinetics of titanium and Ti-6Al-4V (Ti64) using elemental sulfur were studied by measuring the amount of metal consumed instead of the change in mass or scale thickness. This metal consumption approach combines the parabolic oxidation law, Arrhenius equation, and Pilling-Bedworth ratio to determine the apparent activation energy and the pre-exponential factor of consumption of Ti64 during sulfidation. The estimations of apparent activation energy and preexponential factor were 110.4 kJ•mol −1 and 1.3 × 10 −9 m 2 s −1 for the titanium-sulfur, and 116.2 kJ•mol −1 and 1.2 × 10 −9 m 2 s −1 for the Ti64-sulfur system. Finally, a material removal predictor was developed to predict the amount of Ti64 consumed for a given sulfidation temperature and time.

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