Effects of Pore Geometry on the Fatigue Properties of Electron Beam Melted Titanium-6Al-4V

Varney, Tracy Connor; Quammen, R. Nicholaus; Telesz, Nicholas; Balk, T. J.; Wessman, Andrew; Rottmann, Paul F.

doi:10.1007/s11661-021-06194-9

Cited by 6 publications

(1 citation statement)

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“…The total porosity is 0.27%, being 80% of pores’ volume less than 0.1 × 10 −3 mm 3 . This result agrees with the data presented in the literature (Pirozzi et al, 2019 [ 34 ]; Varney et al, 2021 [ 35 ]). Most of the pores are spherical/ellipsoidal in shape with an average diameter of 36 µm as shown in Figure 2 .…”

Section: Resultssupporting

confidence: 93%

Surface Finishing of Additive Manufactured Ti-6Al-4V Alloy: A Comparison between Abrasive Fluidized Bed and Laser Finishing

et al. 2021

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Metal additive manufacturing is a major concern for advanced manufacturing industries thanks to its ability to manufacture complex-shaped parts in materials that are difficult to machine using conventional methods. Nowadays, it is increasingly being used in the industrial manufacturing of titanium-alloy components for aerospace and medical industries; however, the main weakness of structural parts is the fatigue life, which is affected by surface quality, meaning the micro-cracking of small surface defects induced by the manufacturing process. Laser finishing and Abrasive Fluidized Bed are proposed by the authors since they represent cost-effective and environment-friendly alternatives for automated surface finishing. A comparison between these two finishing technologies was established and discussed. Experimental tests investigated both mechanical properties and fatigue performances. The tests also focused on understanding the basic mechanisms involved in fatigue failures of machined Ti-6Al-4V components fabricated via Electron Beam Melting and the effects of operational parameters. X-ray tomography was used to evaluate the internal porosity to better explain the fatigue behaviour. The results demonstrated the capability of Laser finishing and Abrasive Fluidized Beds to improve failure performances. Life Cycle Analysis was additionally performed to verify the effectiveness of the proposed technologies in terms of environmental impact and resource consumption.

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Section: Resultssupporting

confidence: 93%