Fatigue prediction and life assessment method for metal laser powder bed fusion parts

Wessel W. Wits*, Emiel Amsterdam

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)
73 Downloads (Pure)

Abstract

In this paper, an industry-accepted fatigue model based on generalized stress-life (S–N) curves is adapted for metal parts fabricated by laser powder bed fusion (LPBF). Initial defects inherent to the fabrication process, such as part porosity, are related to fatigue life performance. Hereto, additively manufactured test specimens are fatigue tested and used to formulate a function to predict fatigue life based on the size of initial defects. The predictions correlate well with experimental results and provide a quality measure to expel outliers. The method can be used to predict the life expectancy of LPBF parts based on a priori detected defect sizes.

Original languageEnglish
Pages (from-to)129-132
Number of pages4
JournalCIRP Annals
Volume72
Issue number1
Early online date8 Apr 2023
DOIs
Publication statusPublished - 2023

Keywords

  • Additive manufacturing
  • Fatigue
  • Laser powder bed fusion
  • UT-Hybrid-D

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