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Effect of fatigue damage on static and dynamic tensile behaviour of electro-discharge machined Ti-6Al-4V

Jesus Galan Lopez (UGent) , Patricia Verleysen (UGent) and Joris Degrieck (UGent)
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Abstract
The fatigue performance of electro-discharge machined Ti-6Al-4V and, more specifically, the effect of cyclic damage on the static and dynamic tensile properties of the material have been investigated. In a first step, fatigue failure was studied. Afterwards, tensile tests were performed on specimens that had been previously subjected to cyclic loading during predefined fractions of the fatigue life. In addition to conventional experiments at quasi-static strain rate, dynamic tests were performed using a split Hopkinson tensile bar setup. The edges of some of the specimens were removed after cyclic loading to discriminate between the effects of damage at the edges and in the bulk of the material. Results revealed that early fatigue failure is due to the growth of cracks on the machined edges of the specimens. Edge cracks can randomly reduce fracture strain and energy absorbing capacity. However, cyclic damage does not affect the tensile properties of the bulk material.
Keywords
PARAMETERS, SURFACE, TOOL STEEL, FAILURE THRESHOLD, HOPKINSON SPECIMENS, MECHANICAL-PROPERTIES, ALUMINUM-ALLOY, STRENGTH, EDM, MICROSTRUCTURE, damage, fatigue, impact, tensile properties, Ti-6Al-4V

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MLA
Galan Lopez, Jesus, Patricia Verleysen, and Joris Degrieck. “Effect of Fatigue Damage on Static and Dynamic Tensile Behaviour of Electro-discharge Machined Ti-6Al-4V.” FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES 35.12 (2012): 1120–1132. Print.
APA
Galan Lopez, J., Verleysen, P., & Degrieck, J. (2012). Effect of fatigue damage on static and dynamic tensile behaviour of electro-discharge machined Ti-6Al-4V. FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, 35(12), 1120–1132.
Chicago author-date
Galan Lopez, Jesus, Patricia Verleysen, and Joris Degrieck. 2012. “Effect of Fatigue Damage on Static and Dynamic Tensile Behaviour of Electro-discharge Machined Ti-6Al-4V.” Fatigue & Fracture of Engineering Materials & Structures 35 (12): 1120–1132.
Chicago author-date (all authors)
Galan Lopez, Jesus, Patricia Verleysen, and Joris Degrieck. 2012. “Effect of Fatigue Damage on Static and Dynamic Tensile Behaviour of Electro-discharge Machined Ti-6Al-4V.” Fatigue & Fracture of Engineering Materials & Structures 35 (12): 1120–1132.
Vancouver
1.
Galan Lopez J, Verleysen P, Degrieck J. Effect of fatigue damage on static and dynamic tensile behaviour of electro-discharge machined Ti-6Al-4V. FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES. 2012;35(12):1120–32.
IEEE
[1]
J. Galan Lopez, P. Verleysen, and J. Degrieck, “Effect of fatigue damage on static and dynamic tensile behaviour of electro-discharge machined Ti-6Al-4V,” FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, vol. 35, no. 12, pp. 1120–1132, 2012.
@article{3099929,
  abstract     = {The fatigue performance of electro-discharge machined Ti-6Al-4V and, more specifically, the effect of cyclic damage on the static and dynamic tensile properties of the material have been investigated. In a first step, fatigue failure was studied. Afterwards, tensile tests were performed on specimens that had been previously subjected to cyclic loading during predefined fractions of the fatigue life. In addition to conventional experiments at quasi-static strain rate, dynamic tests were performed using a split Hopkinson tensile bar setup. The edges of some of the specimens were removed after cyclic loading to discriminate between the effects of damage at the edges and in the bulk of the material. Results revealed that early fatigue failure is due to the growth of cracks on the machined edges of the specimens. Edge cracks can randomly reduce fracture strain and energy absorbing capacity. However, cyclic damage does not affect the tensile properties of the bulk material.},
  author       = {Galan Lopez, Jesus and Verleysen, Patricia and Degrieck, Joris},
  issn         = {8756-758X},
  journal      = {FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES},
  keywords     = {PARAMETERS,SURFACE,TOOL STEEL,FAILURE THRESHOLD,HOPKINSON SPECIMENS,MECHANICAL-PROPERTIES,ALUMINUM-ALLOY,STRENGTH,EDM,MICROSTRUCTURE,damage,fatigue,impact,tensile properties,Ti-6Al-4V},
  language     = {eng},
  number       = {12},
  pages        = {1120--1132},
  title        = {Effect of fatigue damage on static and dynamic tensile behaviour of electro-discharge machined Ti-6Al-4V},
  url          = {http://dx.doi.org/10.1111/j.1460-2695.2012.01699.x},
  volume       = {35},
  year         = {2012},
}

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