Fatigue Life and Impact Toughness of PBF-LB Manufactured Ti6Al4V and the Effect of Heat Treatment

Timo Rautio, Miguel Araya, Matias Jaskari, Haider Ali Bhatti, Antti Järvenpää

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

While additive manufacturing of metals has been rapidly growing industry for the past decade, the quality and the fatigue properties of the materials are still not very well known. In this study, we focus on the laser powder bed fusion (PBF-LB) manufactured Ti6Al4V. The as built material was compared to the heat treated counterpart by microstructural analysis, and the mechanical properties, impact toughness and the fatigue strength were determined. Bending fatigue testing was conducted for both as built and polished material to reveal the effect of surface roughness. The results showed that the heat treatment and the resulting microstructural change is crucial for the material properties and the material showed very brittle behaviour without it. According to the results, the surface quality plays also an important role in the fatigue life of the material, especially if no heat treatment is used.

Original languageEnglish
Title of host publicationKey Engineering Materials
PublisherTrans Tech Publications Ltd
Pages19-25
Number of pages7
DOIs
StatePublished - 2023

Publication series

NameKey Engineering Materials
Volume964
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Keywords

  • Fatigue Strength
  • Heat Treatment
  • PBF-LB
  • Polishing
  • Ti6Al4V

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