Warpage Behavior of 7075 Aluminum Alloy Extrusions

  • O.S. Es-Said
  • T.M. Ruperto
  • S.L. Vasquez
  • A.Y. Yue
  • D.J. Manriquez
  • J.C. Quilla
  • S.H. Harris
  • S. Hannan
  • J. Foyos
  • E.W. Lee
  • B. Pregger
  • N. Abourialy
  • J. Ogren
Article

Abstract

Extruded I sections of 7075-T6 aluminum were machined into four different sections shapes: L, short depth L, T, and short depth T. The furnace was preheated to 416 °C (780 °F) and the samples were placed inside. The temperature was raised to 471 °C (880 °F) and then the samples were quenched in either a 30% polyalkylene Glycol solution or water, both at 15 °C (59 °F). Points on the distorted samples were recorded before and after the solution treatment; the difference between the measurements indicated the extent of warpage.

Keywords

7075 extrusions varying section shapes warpage 

Notes

Acknowledgment

This work was funded by the National Science Foundation, NSF Grant No. EEC-0353668, Research Experiences for the Undergraduates (REU) site, Ms. Esther Bolding is the program manager. The authors wish to thank Mr. R. Marloth of the Mechanical Engineering Department of Loyola Marymount University for reviewing the manuscript and Ms. Maria Guerrero and Ms. Jacquelyn C. Davis for preparing the manuscript.

References

  1. 1.
    C.E. Bates, Selecting Quenchants to Maximize Tensile Properties and Minimize Distortion in Aluminum Parts, J. Heating Treating, 5(1), 1987, p 27-40Google Scholar
  2. 2.
    C.E. Bates, G.E. Totten, Procedure for Quenching Media Selection to Maximize Tensile Properties and Minimize Distortion in Aluminum Alloy Parts, Heat Treatment of ‘metals, 4, 1988, p 89–97Google Scholar
  3. 3.
    R. Torgerson, C. Kropp, Improving Heat Treat Processing of 7050 Aluminum Alloy Forging Using Synthetic Quenchants, National SAMPE Symposium and Exhibition, 22, 1977, p 111–132Google Scholar
  4. 4.
    B.S. Lasday, “Polyalkylene Glycol Quenching in Heat Treatment of Aluminum Alloy Parts Satisfies Strength Requirements While Limiting Distortion,” Industrial Heating, Jul 1989, p 18–22Google Scholar
  5. 5.
    T.R. Croucher and M.D. Schuler, “Distortion Control of Aluminum Products using Synthetic Quenchants,” Metals Engineering Quarterly, Aug 1991, P 14–18Google Scholar
  6. 6.
    Staley J.T., Quench Factor Analysis of Aluminum Alloys, Mater. Sci. Technol., 3, 1987, p 923–935, NovGoogle Scholar
  7. 7.
    UCON Quenchant A, Tenaxol, Incorporated, Brochure, 1973Google Scholar
  8. 8.
    “Quenchant Overcomes Distortion Problems,” Metal Working Production, Nov 1977, p 98–99Google Scholar
  9. 9.
    J.T. Staley, “Metallurgical Aspects Affecting Strength of Heat-Treatable Alloy Products Used in Aerospace Industry,” The Third International Conference on Aluminum Alloys, EMAS, 1986, p 107–143Google Scholar
  10. 10.
    J. Foyos, E.W. Lee, C. Kumor, M. Smith, C. Hou, and O.S. Es-Said, “Feasibility Study on the Warpage of 7050 Aluminum Plates,” Light Weight Alloys for Aerospace Applications IV, E.W. Lee, et al. Eds., TMS, 1997, p 73–83Google Scholar
  11. 11.
    G.P. Konyukov, A.S. Bedarev, G.I. Beloborodov, E.G. Ilyushko, V.V. Muraviv, and A.V. Sharko, “Effect of Quenching in New Media on the Properties and Structure of Aluminum Alloys,” Metal Science and Heat Treatment, 22, translated from Meallovendenie, Termicheskaya Obrabotka Metallov, 10, Oct 1980, p 26–30Google Scholar
  12. 12.
    L. Maidment, S. Water, and G. Raul, “Heating Treatments for Avoiding Distortion of Aluminum Alloys and Microcracking of High Steel,” Industrial Heating, Mar 1985, p 32–34Google Scholar

Copyright information

© ASM International 2007

Authors and Affiliations

  • O.S. Es-Said
    • 1
  • T.M. Ruperto
    • 1
  • S.L. Vasquez
    • 1
  • A.Y. Yue
    • 1
  • D.J. Manriquez
    • 1
  • J.C. Quilla
    • 1
  • S.H. Harris
    • 1
  • S. Hannan
    • 1
  • J. Foyos
    • 1
  • E.W. Lee
    • 2
  • B. Pregger
    • 2
  • N. Abourialy
    • 2
  • J. Ogren
    • 1
  1. 1.Mechanical Engineering DepartmentLoyola Marymount UniversityLos AngelesUSA
  2. 2.Naval Air Systems CommandPatuxent RiverUSA

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