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Influence of surface topography on fatigue behavior of Ti6Al4V alloy by laser powder bed fusion
Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för ingenjörsvetenskap och fysik (from 2013).ORCID-id: 0000-0002-9441-2502
Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för ingenjörsvetenskap och fysik (from 2013).
University of Lyon.
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2018 (Engelska)Ingår i: Procedia CIRP, Elsevier, 2018, s. 49-52Konferensbidrag (Refereegranskat)
Abstract [en]

This article deals with the understanding of the influence of surface topography on fatigue behavior of Ti6Al4V alloy specimens produced by laser powder bed fusion (LPBF). The same laser parameters and scan strategy were used for all specimens, giving a sample density higher than 99.5 %. Two different surface topographies were obtained by using the top and side surfaces of the specimens. The surface topography and morphology were investigated by optical surface profilometry and focus variation microscopy. Four-point bending fatigue test was performed on specimens with top and side surfaces as the highest stressed surface respectively. Machined specimens were used as reference. The features of the fracture surface, such as crack initiation and propagation, were analyzed by focus variation and scanning electron microscopy (SEM). Both, fatigue results and fracture surface investigations, were correlated and discussed in relation to surface topography and microstructure, as well as manufacturing parameters. 

Ort, förlag, år, upplaga, sidor
Elsevier, 2018. s. 49-52
Nyckelord [en]
Fatigue test, Fracture mechanisms, Laser powder bed fusion, Surface topography, Ti6Al4V alloy, Aluminum alloys, Fatigue of materials, Fatigue testing, Fracture, Scanning electron microscopy, Ternary alloys, Titanium alloys, Topography, Crack initiation and propagation, Fatigue behavior, Four point bending, Fracture surfaces, Laser powders, Manufacturing parameters, Ti-6Al-4V alloy
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Fysik
Forskningsämne
Materialvetenskap
Identifikatorer
URN: urn:nbn:se:kau:diva-70594DOI: 10.1016/j.procir.2018.08.028Scopus ID: 2-s2.0-85057393814OAI: oai:DiVA.org:kau-70594DiVA, id: diva2:1273088
Konferens
10th CIRP Conference on Photonic Technologies, LANE 2018, 3 September 2018 through 6 September 2018
Tillgänglig från: 2018-12-20 Skapad: 2018-12-20 Senast uppdaterad: 2019-04-25Bibliografiskt granskad

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Krakhmalev, PavelFredriksson, Gunnel

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