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Study of the SCC Behavior of 7075 Aluminum Alloy After One-Step Aging at 163 °C

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Abstract

For the past many years, 7075 aluminum alloys have been widely used especially in those applications for which high mechanical performances are required. It is well known that the alloy in the T6 condition is characterized by the highest ultimate and yield strengths, but, at the same time, by poor stress corrosion cracking (SCC) resistance. For this reason, in the aeronautic applications, new heat treatments have been introduced to produce T7X conditions, which are characterized by lower mechanical strength, but very good SCC behavior, when compared with the T6 condition. The aim of this study is to study the tensile properties and the SCC behavior of 7075 thick plates when submitted to a single-step aging by varying the aging times. The tests were carried out according to the standards and the data obtained from the SCC tests were analyzed quantitatively using an image analysis software. The results show that, when compared with the T7X conditions, the single-step aging performed in the laboratory can produce acceptable tensile and SCC properties.

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References

  1. M.S. Domack, Critical Assessment of Precracked Specimen Configuration and Experimental Test Variables for Stress Corrosion Testing of 7075-T6 Aluminum Alloy Plate, ASM, 1986, p 191–198

  2. R.E. Swanson, I.M. Bernstein, and A.W. Thompson, Stress Corrosion Cracking of 7075 Aluminum Alloys in the T6-RR Temper, Scr. Metall., 1982, 16(3), p 321–324

    Article  CAS  Google Scholar 

  3. C.P. Ferrer, M.G. Koul, B.J. Connolly, and A.L. Moran, Improvements in Strength and Stress Corrosion Cracking Properties in Aluminum Alloy 7075 via Low-Temperature Retrogression and Re-ageing Heat Treatment, Corrosion, 2003, 59(6), p 520–528

    Article  CAS  Google Scholar 

  4. T.M. Yue, L.J. Yan, and C.P. Chan, Stress Corrosion Cracking Behavior of Nd:YAG Laser-Treated Aluminum Alloy 7075, Appl. Surf. Sci., 2006, 252(14), p 5026–5034

    Article  CAS  Google Scholar 

  5. J. Onoro, A. Moreno, and C. Ranninger, Stress Corrosion Cracking Model in 7075 Aluminium Alloy, J. Mater. Sci., 1989, 24(11), p 3888–3891

    Article  CAS  Google Scholar 

  6. The Military Handbook, Military Handbook, Ver. 5J, Office of Aviation Research, Washington, DC, 2003

  7. SAE AMS 2772, Heat Treatment of Aluminum Alloy Raw Materials, SAE International, Warrendale, PA, 2008

  8. G. Silva, B. Rivolta, R. Gerosa, and U. Derudi, The Quench Sensitivity of 7075 Aluminum Alloy Plates, Int. Heat Treat. Surf. Eng., 2009, 3(4), p 159–163

    Article  Google Scholar 

  9. R. Gerosa, B. Rivolta, and U. Derudi, Influence of Ageing on Tensile and Stress Corrosion Cracking Behaviour of 7075 Aluminium Alloy Plates, Int. J. Microstruct. Mater. Prop., 2010, 5(1), p 15–25

    CAS  Google Scholar 

  10. G. Silva, B. Rivolta, R. Gerosa, and U. Derudi, Study of New Heat Treatment Parameters for Increasing Mechanical Strength and Stress Corrosion Cracking Resistance of 7075 Aluminium Alloy, La Metall. Ital., 2008, 3, p 21–24

    Google Scholar 

  11. ASTM G39-99, Standard Practice for Preparation and Use of Bent-Beam Stress-Corrosion Test Specimens, ASTM International, West Conshohocken, PA, Reapproved 2005

  12. ASTM B117-11, Standard Practice for Operating Salt Spray (Fog) Apparatus, ASTM International, West Conshohocken, PA

  13. UNI EN 10002, Materiali metallici. Prova di trazione. Metodo di prova (A Temperature Ambiente), UNI, 1992

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Authors and Affiliations

  1. Dipartimento di Meccanica, Politecnico di Milano, Milan, Italy

    G. Silva, B. Rivolta & R. Gerosa

  2. Aviometal Spa, Arsago Seprio, VA, Italy

    U. Derudi

Authors
  1. G. Silva
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  2. B. Rivolta
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  3. R. Gerosa
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  4. U. Derudi
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Correspondence to B. Rivolta.

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Silva, G., Rivolta, B., Gerosa, R. et al. Study of the SCC Behavior of 7075 Aluminum Alloy After One-Step Aging at 163 °C. J. of Materi Eng and Perform 22, 210–214 (2013). https://doi.org/10.1007/s11665-012-0221-4

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  • DOI: https://doi.org/10.1007/s11665-012-0221-4

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