A note on computing the growth of small cracks in AM Ti-6Al-4V

Rhys Jones, Reza Molaei, Ali Fatemi, Daren Peng, Nam Phan

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

The certification requirements for additively manufactured (AM) replacement parts requires the ability to predict the growth of small sub mm cracks. To this end, it is shown that the Hartman-Schijve crack growth equation proposed in a prior paper for the growth of small cracks in AM Ti-6Al-4V manufactured specimens also accurately predicts the growth of small cracks in Laser Beam Powder Bed Fusion (LB-PBF) manufactured Ti-6Al-4V specimens. The specimens studied are built with two different LB-PBF machines with different processing parameters. Particular attention is given to the growth of crack from initial sizes that are of the same order of magnitude as the minimum equivalent initial damage size (EIDS) in the US Air Force (USAF) approach to the certification of an AM replacement part.

Original languageEnglish
Title of host publicationProcedia Structural Integrity
PublisherElsevier
Pages364-369
Number of pages6
Volume28
DOIs
Publication statusPublished - 2020
EventVirtual European Conference on Fracture 2020 - Virtual, Online
Duration: 29 Jun 20201 Jul 2020
Conference number: 1st
https://www.sciencedirect.com/journal/procedia-structural-integrity/vol/28/suppl/C (Proceedings)

Conference

ConferenceVirtual European Conference on Fracture 2020
Abbreviated titleVECF 2020
CityVirtual, Online
Period29/06/201/07/20
Internet address

Keywords

  • CFRP
  • Composites
  • Fatigue
  • Fracture mechanics
  • Modelling
  • Service-life

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