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Slow fatigue crack growth in 2024-T3 and Ti-6Al-4V at low and ultrasonic frequency

  • H. Mayer , B. Holper , B. Zettl and S. E. Stanzl-Tschegg EMAIL logo
Published/Copyright: February 5, 2022
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 94 Issue 5

Abstract

Fatigue crack growth in 2024-T3 has been studied in ambient air and in vacuum at load ratios R = –1, R = 0.05 and R = 0.5 using ultrasonic equipment (cycling frequency 20 kHz) and servo-hydraulic equipment (20 Hz). In vacuum, no strain rate influences were found and similar growth rates and threshold stress intensities were measured at both frequencies. In ambient air, threshold stress intensities were similar at 20 Hz and 20 kHz and were 53 –62% of the respective values measured in vacuum. Above threshold, fatigue crack growth rates at ultrasonic frequency are slower (at R = –1) or similar (at R = 0.5) to growth rates at 20 Hz. Ultrasonic fracture mechanics tests in Ti-6Al-4V at load ratios R = 0.1, R = 0.5 and R = 0.8 in ambient air delivered threshold values similar to cycling frequency 50 Hz, whereas growth rates above threshold are approximately a factor of 3 higher at 20 kHz. The compressive part of a load cycle under fully reversed loading condition causes additional fatigue damage, and the maximum stress intensity factor at threshold is lower at R = –1 than at R = 0.05 or R = 0.1.

Keywords: Al –Cu –Mg–Si alloy (2024-T3); Ti-6Al-4V alloy; Threshold stress intensity; Load ratio; Strain rate; Air humidity

Dedicated to Professor Dr. Otmar Vöhringer on the occasion of his 65th birthday

Prof. Stefanie Tschegg Türkenschanzstr. 18, A-1180 Vienna, Austria Tel.: +43 1 4705 820-13 Fax: +43 1 4705 820-60

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Received: 2002-11-01
Published Online: 2022-02-05

© 2003 Carl Hanser Verlag, München

Articles in the same Issue

  1. Frontmatter
  2. Editorial
  3. Editorial
  4. Articles/Aufsätze
  5. On the dislocation mechanisms of dynamic strain ageing in fatigued plain carbon steels
  6. Effect of the γ’ volume fraction on the creep strength of Ni-base superalloys
  7. Auswirkung von Ausscheidungen auf das bestrahlungsinduzierte Schwellverhalten und die Hochtemperaturversprödung in dem austenitischen Stahl X10 CrNiMoTiB 15 15
  8. Fatigue life and cyclic deformation behaviour of quenched and tempered steel AISI 4140 at two-step stress- and total-strain-controlled push–pull loading
  9. Untersuchungen zur Anrisslebensdauervorhersage gekerbter Proben mit dem örtlichen Konzept am Beispiel des Stahls Cm15
  10. Bewertung des Ermüdungsverhaltens von Radstählen anhand von Dehnungs-, Temperatur- und Widerstandsmessungen
  11. On the nature of internal interfaces in tempered martensite ferritic steels
  12. Ermittlung von Grenzformänderungskurven an laser- und elektronenstrahlgeschweißten Stahlblechplatinen
  13. Point defects, precipitates and the strength anomaly in ordered Fe–Al alloys
  14. Isothermal high-temperature fatigue behaviour of a near-γ titanium aluminide alloy
  15. Slow fatigue crack growth in 2024-T3 and Ti-6Al-4V at low and ultrasonic frequency
  16. Structural evolution during the cycling of NiTi shape memory alloys
  17. Phase transformations due to isochronal annealing of Mg – rare earth – Sc–Mn squeeze cast alloys
  18. Isothermal strain-controlled quasi-static and cyclic deformation behavior of magnesium wrought alloy AZ31
  19. Microstructure of die-cast alloys Mg–Zn–Al(–Ca): a study by electron microscopy and small-angle neutron scattering
  20. TEM study of the dislocation structure at the transition from discontinuous to viscous glide in Cu–Al and Cu–Mn alloys at elevated temperatures
  21. Application of electron backscatter diffraction in the SEM to textural problems of coated high-temperature superconductors
  22. Oxide dispersion-strengthened silver: manufacturing and properties
  23. Integrative finite element simulation of the rolling of Al alloys with coupled dislocation density and texture models
  24. Microstructure, surface topography and mechanical properties of slip cast and powder injection moulded microspecimens made of zirconia
  25. Thermisch leitfähig modifizierte Funktionskunststoffe
  26. Tailoring nanocrystalline materials towards potential applications
  27. High-strength Cu–Ti-rich bulk metallic glasses and nano-composites
  28. Nanoskalige Schutzschichten für hochbeanspruchte Werkzeuge und Bauteile
  29. Prediction of the critical conditions for dynamic recrystallization in metals
  30. Notifications/Mitteilungen
  31. Personal/Personelles
  32. Conferences/Konferenzen
https://doi.org/10.1515/ijmr-2003-0095
Keywords for this article
Al –Cu –Mg–Si alloy (2024-T3); Ti-6Al-4V alloy; Threshold stress intensity; Load ratio; Strain rate; Air humidity

Articles in the same Issue

  1. Frontmatter
  2. Editorial
  3. Editorial
  4. Articles/Aufsätze
  5. On the dislocation mechanisms of dynamic strain ageing in fatigued plain carbon steels
  6. Effect of the γ’ volume fraction on the creep strength of Ni-base superalloys
  7. Auswirkung von Ausscheidungen auf das bestrahlungsinduzierte Schwellverhalten und die Hochtemperaturversprödung in dem austenitischen Stahl X10 CrNiMoTiB 15 15
  8. Fatigue life and cyclic deformation behaviour of quenched and tempered steel AISI 4140 at two-step stress- and total-strain-controlled push–pull loading
  9. Untersuchungen zur Anrisslebensdauervorhersage gekerbter Proben mit dem örtlichen Konzept am Beispiel des Stahls Cm15
  10. Bewertung des Ermüdungsverhaltens von Radstählen anhand von Dehnungs-, Temperatur- und Widerstandsmessungen
  11. On the nature of internal interfaces in tempered martensite ferritic steels
  12. Ermittlung von Grenzformänderungskurven an laser- und elektronenstrahlgeschweißten Stahlblechplatinen
  13. Point defects, precipitates and the strength anomaly in ordered Fe–Al alloys
  14. Isothermal high-temperature fatigue behaviour of a near-γ titanium aluminide alloy
  15. Slow fatigue crack growth in 2024-T3 and Ti-6Al-4V at low and ultrasonic frequency
  16. Structural evolution during the cycling of NiTi shape memory alloys
  17. Phase transformations due to isochronal annealing of Mg – rare earth – Sc–Mn squeeze cast alloys
  18. Isothermal strain-controlled quasi-static and cyclic deformation behavior of magnesium wrought alloy AZ31
  19. Microstructure of die-cast alloys Mg–Zn–Al(–Ca): a study by electron microscopy and small-angle neutron scattering
  20. TEM study of the dislocation structure at the transition from discontinuous to viscous glide in Cu–Al and Cu–Mn alloys at elevated temperatures
  21. Application of electron backscatter diffraction in the SEM to textural problems of coated high-temperature superconductors
  22. Oxide dispersion-strengthened silver: manufacturing and properties
  23. Integrative finite element simulation of the rolling of Al alloys with coupled dislocation density and texture models
  24. Microstructure, surface topography and mechanical properties of slip cast and powder injection moulded microspecimens made of zirconia
  25. Thermisch leitfähig modifizierte Funktionskunststoffe
  26. Tailoring nanocrystalline materials towards potential applications
  27. High-strength Cu–Ti-rich bulk metallic glasses and nano-composites
  28. Nanoskalige Schutzschichten für hochbeanspruchte Werkzeuge und Bauteile
  29. Prediction of the critical conditions for dynamic recrystallization in metals
  30. Notifications/Mitteilungen
  31. Personal/Personelles
  32. Conferences/Konferenzen
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