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Microstructure evolution in a 2618 aluminium alloy during creep-fatigue tests

  • František Nový , Miloš Janeček , Robert Král and Branislav Hadzima
Published/Copyright: June 11, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 103 Issue 6

Abstract

Microstructure changes in the 2618 aluminium alloy during creep-fatigue tests were studied. These tests simulate the conditions of the application of this alloy in devices for the exhaustion of hot gasses generated during fire in closed or difficultly accessible areas. Creep-fatigue tests result in high dislocation density in subgrains and narrow subgrain boundaries, in contrast to creep tests reported in our previous work where large subgrains were observed with relatively wide subgrain boundaries and relatively low dislocation density in grains. Extensive precipitation occurred with denuded (precipitate-free) zones along grain boundaries. The coherent S-phase (Al2CuMg) transformed into partially coherent needle-shaped S′ precipitates. Superior stress amplitude caused reduced lifetime and wider denuded zones. A model of the formation of denuded zones along (sub)grain boundaries was proposed.

Keywords: 2618 aluminium alloy; Creep; Fatigue; Microstructure evolution
* Correspondence address Dr. Milos Janecek Charles University, Department of Physics of MaterialsKe Karlovu 5, CZ-1216 Prague 2, Czech Republic Tel.: +420221911359 Fax: +420221911490 E-mail:

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Received: 2010-11-28
Accepted: 2011-11-15
Published Online: 2013-06-11
Published in Print: 2012-06-01

© 2012, Carl Hanser Verlag, München

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  2. Contents
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  4. Diffusion characteristics in the Cu–Ti system
  5. Hydrogen permeability with dislocation in low carbon, aluminium-killed, enamel-grade steels
  6. Numerical simulation of the evolution of primary and secondary Nb(CN), Ti(CN) and AlN in Nb-microalloyed steel during continuous casting
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  15. Effect of pH on structure, morphology and optical properties of nanosized cupric oxide prepared by a simple hydrolysis method
  16. Metal-oxide-modified nanostructured carbon application as novel adsorbents for chromate ion removal from water
  17. Biological evaluation of micro-nanoporous layer on Ti–Ag alloy for dental implant
  18. Design of damage tolerance in high-strength steels
  19. Creep modeling and creep life estimation of Gr.91
  20. Influence of the layer architecture of DLC coatings on their wear and corrosion resistance
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  24. DGM News
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https://doi.org/10.3139/146.110679
Keywords for this article
2618 aluminium alloy; Creep; Fatigue; Microstructure evolution

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Diffusion characteristics in the Cu–Ti system
  5. Hydrogen permeability with dislocation in low carbon, aluminium-killed, enamel-grade steels
  6. Numerical simulation of the evolution of primary and secondary Nb(CN), Ti(CN) and AlN in Nb-microalloyed steel during continuous casting
  7. Microstructure evolution in a 2618 aluminium alloy during creep-fatigue tests
  8. Microstructure characterization in the weld joint of a high nickel austenitic alloy and Cr18-Ni8 stainless steel
  9. The reoptimization of the binary Se–Te system
  10. Phase diagram of the Sm–Dy–Fe ternary system
  11. Thermophysical properties of solid phase Ti-6Al-4V alloy over a wide temperature range
  12. Determination of mechanical properties by nanoindentation in the case of viscous materials
  13. Mechanical properties and biodegradable behavior of Mg–6%Zn–Ca3(PO4)2 metal matrix composites in Ringer's solution
  14. Effect of Ti addition on the wettability of Al–B4C metal matrix composites
  15. Effect of pH on structure, morphology and optical properties of nanosized cupric oxide prepared by a simple hydrolysis method
  16. Metal-oxide-modified nanostructured carbon application as novel adsorbents for chromate ion removal from water
  17. Biological evaluation of micro-nanoporous layer on Ti–Ag alloy for dental implant
  18. Design of damage tolerance in high-strength steels
  19. Creep modeling and creep life estimation of Gr.91
  20. Influence of the layer architecture of DLC coatings on their wear and corrosion resistance
  21. Potential of mechanical surface treatment for mould and die production
  22. Short Communications
  23. Discussion of defect analysis of a Ti-6Al-4V alloy forging ring
  24. DGM News
  25. DGM News
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