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Post-Processing Effect on the Fatigue Behavior of Three Titanium Alloys under Simulated SPF Conditions

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This experimental study investigates a post-Superplastic Forming (SPF) processing method with reduced material removal requirements and its effect on high-cycle fatigue behavior. Comprehensive high-cycle fatigue experiments were conducted on three titanium alloys in part to validate the proposed post process and in part to provide baseline properties for evaluating additional materials. High-Cycle Fatigue results indicated that lower temperature superplastic forming conditions allow more efficient use of titanium material. Manufacturing process designers needing to predict the best SPF conditions and establish design allowables for titanium alloys may find the results of this research useful.

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References

  1. F.S. Pitt, “Influence of Time, Temperature and Alloy on Oxygen Absorption in SPF Titanium,” Master’s thesis, University of Washington, 2000

  2. J.A. Ruppen, C.L. Hoffmann, and V.M. Radhakrishnan, The Effect of Environment and Temperature on the Fatigue Behavior of Titanium alloys, Fatigue, Environment and Temperature Effects, J.J. Burke and V. Weiss, Eds., Plenum Press, 1980, p 265–300

  3. D.J. Dorr, “Built-Up Low Cost Advanced Titanium Structures,” 1979, Materials Laboratory, Air Force Wright Aeronautical Laboratories, AFWAL-TR-79-3146, 1979, p 200

  4. D.B. Lanning, G.K. Haritos, and T. Nicholas, High Cycle Fatigue Behavior and Notch Size Effects in Ti 6Al-4V, in Mechanical Behavior of Advanced Materials, D.C. Davis, A.M. Sastry, M.L. Dunn, an A.K. Roy, Eds., Anaheim, CA, The American Society of Mechanical Engineers, 1998, p 19–25

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Authors and Affiliations

  1. Department of Mechanical Engineering, University of Washington, Box 352600, Seattle, WA, 98195, USA

    F. Pitt & M. Ramulu

  2. The Boeing Company, Box 3707, Seattle, WA, 98124, USA

    F. Pitt

Authors
  1. F. Pitt
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  2. M. Ramulu
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Corresponding author

Correspondence to F. Pitt.

Additional information

This article was presented at the AeroMat Conference, International Symposium on Superplasticity and Superplastic Forming (SPF) held in Seattle, WA, June 6-9, 2005

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Pitt, F., Ramulu, M. Post-Processing Effect on the Fatigue Behavior of Three Titanium Alloys under Simulated SPF Conditions. J. of Materi Eng and Perform 16, 163–169 (2007). https://doi.org/10.1007/s11665-007-9027-1

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  • DOI: https://doi.org/10.1007/s11665-007-9027-1

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