Short crack growth model for the evaluation of the fatigue strength of WAAM Ti-6Al-4V alloy containing pore-type defects

Marcos Bergant; Nicolás O. Larrosa; Alejandro Yawny; Mauro Madia

doi:10.1016/j.engfracmech.2023.109467

Short crack growth model for the evaluation of the fatigue strength of WAAM Ti-6Al-4V alloy containing pore-type defects

Marcos Bergant, Nicolás O. Larrosa, Alejandro Yawny, Mauro Madia

Materials for extreme conditions

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

3 Citations (Scopus)

Abstract

The role of defects in the fatigue strength of Wire Arc Additively Manufactured (WAAMed) Ti-6Al-4V is analysed by means of the IBESS model, a fracture mechanics short crack growth approach based on the cyclic R-curve. Pores and crack-like defects are analysed. Estimations of the role of pore shape and size agree well with published fatigue data of WAAM Ti-6Al-4V with pores. The model is also used to explain the effect of fabrication defects on the scatter of experimental data. This demonstrates that short crack growth models represent a suitable engineering tool for the fatigue assessment of defective AM materials.

Original language	English
Article number	109467
Journal	Engineering Fracture Mechanics
Volume	289
DOIs	https://doi.org/10.1016/j.engfracmech.2023.109467
Publication status	Published - 1 Sept 2023

Keywords

Cyclic R-curve
IBESS model for short cracks-curve
Kitagawa-Takahashi (K-T) diagram
WAAM Ti-6Al-4V

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10.1016/j.engfracmech.2023.109467

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title = "Short crack growth model for the evaluation of the fatigue strength of WAAM Ti-6Al-4V alloy containing pore-type defects",

abstract = "The role of defects in the fatigue strength of Wire Arc Additively Manufactured (WAAMed) Ti-6Al-4V is analysed by means of the IBESS model, a fracture mechanics short crack growth approach based on the cyclic R-curve. Pores and crack-like defects are analysed. Estimations of the role of pore shape and size agree well with published fatigue data of WAAM Ti-6Al-4V with pores. The model is also used to explain the effect of fabrication defects on the scatter of experimental data. This demonstrates that short crack growth models represent a suitable engineering tool for the fatigue assessment of defective AM materials.",

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AU - Bergant, Marcos

AU - Larrosa, Nicolás O.

AU - Yawny, Alejandro

AU - Madia, Mauro

PY - 2023/9/1

Y1 - 2023/9/1

N2 - The role of defects in the fatigue strength of Wire Arc Additively Manufactured (WAAMed) Ti-6Al-4V is analysed by means of the IBESS model, a fracture mechanics short crack growth approach based on the cyclic R-curve. Pores and crack-like defects are analysed. Estimations of the role of pore shape and size agree well with published fatigue data of WAAM Ti-6Al-4V with pores. The model is also used to explain the effect of fabrication defects on the scatter of experimental data. This demonstrates that short crack growth models represent a suitable engineering tool for the fatigue assessment of defective AM materials.

AB - The role of defects in the fatigue strength of Wire Arc Additively Manufactured (WAAMed) Ti-6Al-4V is analysed by means of the IBESS model, a fracture mechanics short crack growth approach based on the cyclic R-curve. Pores and crack-like defects are analysed. Estimations of the role of pore shape and size agree well with published fatigue data of WAAM Ti-6Al-4V with pores. The model is also used to explain the effect of fabrication defects on the scatter of experimental data. This demonstrates that short crack growth models represent a suitable engineering tool for the fatigue assessment of defective AM materials.

KW - Cyclic R-curve

KW - IBESS model for short cracks-curve

KW - Kitagawa-Takahashi (K-T) diagram

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DO - 10.1016/j.engfracmech.2023.109467

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VL - 289

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

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Short crack growth model for the evaluation of the fatigue strength of WAAM Ti-6Al-4V alloy containing pore-type defects

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Keywords

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