On the effect of internal channels and surface roughness on the high-cycle fatigue performance of Ti-6Al-4V processed by SLM

On the effect of internal channels and surface roughness on the high-cycle fatigue performance of... •For SLM processed samples containing internal channels crack initiation is observed at channel surfaces and bulk porosity•Despite distinct crack initiation sites fatigue life data are characterized by a low degree of scatter for a given geometry•Fatigue lives of the different geometries tested are clearly affected by the ligament size•A fracture mechanics based approach is able to capture differences in fatigue lives of the sample geometries considered•Based on the findings presented the superior impact of crack growth life on the overall fatigue life is deduced http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Materials & design Elsevier

On the effect of internal channels and surface roughness on the high-cycle fatigue performance of Ti-6Al-4V processed by SLM

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Publisher
Elsevier
Copyright
Copyright © 2018 Elsevier Ltd
ISSN
0264-1275
eISSN
0141-5530
D.O.I.
10.1016/j.matdes.2018.01.042
Publisher site
See Article on Publisher Site

Abstract

•For SLM processed samples containing internal channels crack initiation is observed at channel surfaces and bulk porosity•Despite distinct crack initiation sites fatigue life data are characterized by a low degree of scatter for a given geometry•Fatigue lives of the different geometries tested are clearly affected by the ligament size•A fracture mechanics based approach is able to capture differences in fatigue lives of the sample geometries considered•Based on the findings presented the superior impact of crack growth life on the overall fatigue life is deduced

Journal

Materials & designElsevier

Published: Apr 5, 2018

References

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