United States Air Force Academy

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Dr. Ralph Bush

Professor of Engineering and Mechanics

Department of Engineering Mechanics

Bio of Ralph Bush
Contact Information

(719) 333-7940



PhD Materials Science – University of Rochester

M.S. Materials Science – University of Rochester

B.S. Physics – Rochester Institute of Technology

Professional Experience

Alcoa – Research Metallurgist, 10 yrs

U.S. Air Force Academy – DFEM Faculty, 20 yrs

Research and Scholarly Interests

Characterization of aerospace materials

Fatigue and fracture mechanics


Keith W. Jones and Ralph W. Bush, “Investigation of Residual Stress Relaxation in Cold Expanded Holes by the Slitting Method”, Engineering Fracture Mechanics, Vol 179, 15, June 2017, pp. 213-224.

Ralph Bush, Jacob Gill, and Jarred Teakell, “Heat Treat Optimization and Fabrication of a 440C Stainless Steel Knife”, JOM, Vol 68, No. 12, December 2016, pp. 3167-3173.

RW Bush, M Kiyota, C Kiyota, “Characterization of a friction stir weld in aluminum alloy 7055 using micro-hardness, electrical conductivity and differential scanning calorimetry (DSC)”, Metallurgical and Materials Transactions A, Vol 47, No. 7, July 2016, pp 3522-3532.

JT Burns, RW Bush, JH Ai, JL Jones, Y Lee, and RP Gangloff, “Effect of water vapor pressure on fatigue crack growth in Al-Zn-Cu-Mg over wide-range stress intensity factor loading”, Engineering Fracture Mechanics, Vol 137, March 2015, pp34-55.
RW Bush and CA Brice, “Elevated temperature characterization of electron beam freeform fabricated Ti-6Al-4V and dispersion strengthened Ti-8Al-1Er”, Materials Science and Engineering A, Vol 554, Sept 30, 2012, pp. 12-21

JT Burns, RW Bush, and RP Gangloff, “Effect of environment on corrosion induced fatigue crack growth formation and early propagation in aluminum alloy Al 7075-T651”, in: Proceedings of NACE Corrosion Conference, NACE International, La Quinta, CA, (2011).

D. Li, J. Burns, R. Bush, M. Garratt, A. Hinkle, T. Mills, C. Marks, J. Moran, J. Scully and R.P. Gangloff, “Characterization of Corrosion-Fatigue Interaction for Aluminum Alloy Substitution”, in Proceedings of the 8th Joint NASA/FAA/DoD Conference on Aging Aircraft, R. D. Young, Editor, web site publication: www. JCAA.US/AA_Conference2005 (2005).

J.M. Greer, M. Brown, D.W. Hill, S.A. Fawaz, C.B. Guijt, S. Verhoeven, R. Bush, D. Falls, and R. Logan, “Fatigue and Residual Strength Effects of Exfoliation Corrosion”, in Proceedings of the 8th Joint NASA/FAA/DoD Conference on Aging Aircraft, R. D. Young, Editor, web site publication: www. JCAA.US/AA_Conference2005 (2005).

Bush, R.W., Brice, C.A., Baer, J., Skaar, E.T., “Elevated temperature characterization of dispersion strengthened, direct laser deposited Ti-8Al-1Er” , Proceedings of the TMS Fall Meeting – Symposium on Rapid Prototyping of Materials, Minerals, Metals and Materials Society, Warrendale, PA., 2002, pp. 149-163.

“Standard Guide for Plane Strain Fracture Toughness of Non-Stress Relieved Aluminum Products”, ASTM Standard Guide B909-00 under the jurisdiction of ASTM Committee B07 on Light Metals and Alloys. Co-authored with Dr. G.H. Bray, 2000. Document appears in Vol. 02.02 of the 2001 Annual Book of ASTM Standards, Nonferrous Metal Products, Aluminum and Magnesium Alloys.

Bush, R.W., Donald, J.K., and Bucci, R.J., “Pitfalls to Avoid in Threshold Testing and Its Interpretation,” Fatigue Crack Growth Thresholds, Endurance Limits, and Design, ASTM STP 1372, J.C. Newman, Jr. and R.S. Piascik, Eds., American Society for Testing and Materials, West Conshohocken, PA, 2000, pp. 269-284.

Donald, J.K., Bray, G.H., and Bush, R.W., (1997), “An Evaluation of the Adjusted Compliance Ratio Technique for Determining the Effective Stress Intensity Factor,” in 29th National Symposium on Fatigue and Fracture Mechanics, ASTM STP 1332, T.L. Panontin, S.D. Sheppard, Eds., American Society for Testing and Materials.

Bucci, R. J., Bush, R. W., Hinkle, A. J., Konish, H. J, Kuhlman, G. W., Kulak, M., and Wygonik, R. H., “Aspects of Microstructure and Working History on High Strength Aluminum Forged End-Product Performance,” Proceedings of the 1st International Non-Ferrous Processing and Technology Conference, ASM International, Materials Park, Ohio, 1997, pp. 93-114.

Donald, J.K., Bray, G.H., and Bush, R.W., “Introducing the Kmax sensitivity concept for correlating fatigue crack growth data,” High Cycle Fatigue of Structural Materials, W.O. Soboyejo and T.S. Srivatsan, eds., The Minerals, Metals and Materials Society, 1997, pp. 123-141.

Bush, R.W., Bucci, R.J., Magnusen, P.E. and Kuhlman, G.W. (1993) “Fatigue Crack Growth Rate Measurements in Aluminum Alloy Forgings: Effects of Residual Stress and Grain Flow.” In Fracture Mechanics: Twenty Third Symposium, ASTM STP 1189, R. Chona, editor., ASTM, Philadelphia, pp. 568-589.

Cokelet, G.R., Bush, R.W. and LaCelle, P.L. (1981) Electroviscous flow and electrophoretic motion during erythrocyte entry in a glass capillary in the presence of applied potential gradients. Pflugers Archiv., 390:94-95.

LaCelle, P.L., Bush, R.W. and Smith, B.D. (1981) Viscoelastic properties of normal and pathologic human granulocytes and lymphocytes. International Workshop: White Blood Cells: Morphology and Rheology as Related to Function, London, England.