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

Olena Karpenko; Selda Oterkus; Erkan Oterkus

doi:10.1016/j.engfracmech.2021.108212

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

Olena Karpenko, Selda Oterkus, Erkan Oterkus

Naval Architecture, Ocean And Marine Engineering

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

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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 language	English
Article number	108212
Journal	Engineering Fracture Mechanics
Volume	261
Early online date	7 Jan 2022
DOIs	https://doi.org/10.1016/j.engfracmech.2021.108212
Publication status	Published - 15 Feb 2022

Keywords

peridynamics
additive manufacturing
microstructure
porosity defects
fatigue
performance prediction

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10.1016/j.engfracmech.2021.108212

Karpenko-etal-EFM-2022-Peridynamic-analysis-to-investigate-the-influence-of-microstructureAccepted author manuscript, 2.85 MBLicence: CC BY-NC-ND 4.0

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

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.",

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T1 - Peridynamic analysis to investigate the influence of microstructure and porosity on fatigue crack propagation in additively manufactured Ti6Al4V

AU - Karpenko, Olena

AU - Oterkus, Selda

AU - Oterkus, Erkan

PY - 2022/2/15

Y1 - 2022/2/15

N2 - 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.

AB - 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.

KW - peridynamics

KW - additive manufacturing

KW - microstructure

KW - porosity defects

KW - fatigue

KW - performance prediction

U2 - 10.1016/j.engfracmech.2021.108212

DO - 10.1016/j.engfracmech.2021.108212

M3 - Article

VL - 261

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

SN - 0013-7944

M1 - 108212

ER -

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

Abstract

Keywords

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