Peridynamic analysis to investigate the influence of microstructure and porosity on fatigue crack propagation in additively manufactured Ti6Al4V

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Abstract

Additive Manufacturing (AM) has gained a lot of interest due to the freedom to produce complex metal geometries directly from the designed digital model. Despite the high potential of AM, the process induced imperfections, like pores and the microstructural changes due to the layer-by-layer manufacturing, made a significant impact on the fatigue resistance and crack growth behaviour. Consequently, this work aims to evaluate the effect of microstructure and existence of pores in additively manufactured Ti6Al4V on Fatigue Crack Growth (FCG) utilizing bond-based Peridynamics (PD) fatigue model. Employing the columnar granularity and different levels of porosities indicated a substantial impact on FCG rates.
Original languageEnglish
Article number108212
JournalEngineering Fracture Mechanics
Volume261
Early online date7 Jan 2022
DOIs
Publication statusE-pub ahead of print - 7 Jan 2022

Keywords

  • peridynamics
  • additive manufacturing
  • microstructure
  • porosity defects
  • fatigue
  • performance prediction

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