Location of Repository

Influence of grain structure and slip planarity on fatigue crack growth in low alloying artificially aged 2xxx aluminium alloys

By N. Kamp, N. Gao, M.J. Starink and I. Sinclair


The fatigue crack growth behaviour under constant amplitude loading of three low alloying artificially aged 2xxx aluminium alloys with distinct microstructures is analysed. Fatigue crack growth tests show a correlation between fatigue performance and the occurrence of crack closure. Fractography and fracture surface measurements show that rougher surfaces give higher closure levels suggesting a dominating influence of RICC in these alloys. The relationship between the crack path and the microstructure, i.e. grain structure and slip planarity, is assessed semi-quantitatively. A criterion to evaluate the propensity for slip band formation is derived and reasonable correlation is found between the fatigue fracture behaviour of the three alloys and this criterion. <br/

Topics: QD, TA
Year: 2007
OAI identifier: oai:eprints.soton.ac.uk:43986
Provided by: e-Prints Soton

Suggested articles



  1. (1988). A comparison of measurements methods and numerical procedures for the experimental characterization of fatigue crack closure. In: Mechanics of fatigue crack closure.
  2. Development of new damage tolerant alloys for age-forming Mater Sci Forum
  3. (2000). Effect of artificial aging on the fatigue crack propagation resistance of
  4. Experimental (TEM and STEM) investigation and theoritical approach to the fatigue-induced dissolution of delta' precipitates in a 2.5wt-percent Al-Li alloy. Philos Mag A 1987;56:353-366.
  5. (1988). Fatigue crack closure observations and technical significance. In: Mechanics of fatigue crack closure.
  6. (1992). Fatigue of Aluminum-Lithium Alloys.
  7. (1988). Large shearable particles lead to coarse slip in particle reinforced alloys Acta Metall
  8. (1993). Mechanical behavior of double aged AA8090 Metall Trans A
  9. (1984). Mechanisms of slow fatigue crack-growth in high-strength aluminum alloys - role of microstructure and environment Metall Trans A
  10. Microstructure and precipitation in Al-Li-Cu-Mg-(Mn, Zr) alloys Mater Sci Tech 2005;21:1010-1018. [10] Xu
  11. (1996). On deviated and branched crack path in Al-Li-X alloys Mater Sci Eng A
  12. (1996). Precise determination of fatigue crack closure in Al alloys Mater Sci. Eng A
  13. (1993). Predicting slip behavior in alloys containing shearable and strong particles Mater Sci Eng. A
  14. (2006). Relations between microstructure, precipitation, age-formability and damage tolerance of Al-Cu-MgLi (Mn,Zr,Sc) alloys for age forming Mater.
  15. Room temperature precipitation in quenched Al-Cu-Mg alloys: a model for the reaction kinetics and yield strength development.
  16. Slow fatigue crack growth and threshold behavior in air and vacuum of commercial aluminum alloys Fatigue Eng Mater Struct 1979;1:203.
  17. (1999). Starink MJ.The Analysis of Al-Based Alloys by Calorimetry: Quantitative Analysis of Reactions and Reaction Kinetics. Int Mater Rev 2004;49:191-226. [21] Starink
  18. (1998). Study of fatigue damage in 7010 aluminum alloy Mater Sci Eng A
  19. Systematic assessment and validation of compliance-based crack closure measurements in fatigue.

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.