PRELIMINARY PROGRAM

FATIGUE DAMAGE OF
STRUCTURAL MATERIALS II

September 7 - 11, 1998
Radisson Inn Hyannis
Cape Cod, Massachussetts

Chair:

A.K. Vasudevan
Office of Naval Research

Co-Chairs:

J.C. Cammett
Naval Aviation Depot

T. Nicholas
USAF Wright Laboratory

K. Jata
Air Force Research Laboratory

Engineering Foundation Conferences
345 East 47th Street, Suite 303
New York, N.Y. 10017
T: 1-212-705-7836; F: 1-212-705-7441
E: engfnd@aol.com; www: http://www.engfnd.org

Poster Sessions

Monday, September 7, 1998

4:00 pm - 6:00 pm Registration

6:00 pm - 7:30 pm Dinner
Welcoming Remarks
A.K. Vasudevan, Conference Chair
T. Nicholas, Conference Co-Chair
Herman Bieber, Engineering Foundation

7:30 pm - 9:00 pm Reception

Tuesday, September 8, 1998

7:00 am - 8:30 am Breakfast (Buffet)

8:30 am - 8:45 am INTRODUCTION

Organizing Committee:
Ted Nicholas, A. Vasudevan, John Petrovic and K. Jata

REVIEWS
Session Chair: T. Nicholas, WPAFB, Dayton, OH

8:45 am - 9:30 am 1. Tailoring the Structural Integrity Process to Meet the Challenges
of Aging Aircraft

D. Simpson, National Reseach Council, Canada;
C.L. Brooks, Analytical Processes Engineered Solutions, St. Louis, MO

9:30 am - 10:15 am 2. Contact Fatigue Damage & Cracking
S. Suresh, MIT, Cambridge, MA

10:15 am - 10:30 am Coffee Break

10:30 am - 11:15 am 3. Near Threshold Fatigue - A Review
L. Lawson, Bradford, PA;
E.Y. Chen, General Electric Co., Schenechtady, NY;
M. Meshii, Northwestern University, IL

11:15 am - 11:55 am 4. Elastic-Plastic Stress-Strain Analysis of Notches Under Non- Proportional Cyclic Loading Paths
G. Glinka, University of Waterloo, Canada

12:00 noon - 1:15 pm Lunch

VARIABLE AMPLITUDE LOADS
Session Chair: John Cammett, NADEP, Cherry Point, NC

1:15 pm - 1:45 pm 5. Service Load Fatigue Damage - A Historical Perspective
P. C. Paris, Washington University, St. Louis, MO

1:45 pm - 2:25 pm 6. Effects of Overloads & Underloads on FCG
K. Sadananda, Naval Research Laboratory, Washington, DC;
A.K. Vasudevan, ONR, Arlington, VA

2:25 pm - 2:50 pm 7. Effect of Overloads on the Intrinsic FCG Curve
J.K. Donald, Fracture Technology Associates, PA ;
G.M. Connelly, CAR, PA

2:50 pm - 3:15 pm 8. Interpreting Fracture Surface Topography to Deduce Fatigue Load Spectra
T. Kobayashi & D.A. Shockey, SRI International, CA

3:15 pm - 3:30 pm Coffee Break

3:30 pm - 3:55 pm 9. Tensile & Compression Overloads & Load Interaction Effects
on Fatigue Damage

M. Lang, J.M. Larson & G.A. Hartman, WPAFB, Ohio

3:55 pm - 4:20 pm 10. FCG From Simulated Flight Cycles Involving Superimposed Vibrations
M. Hawkyard, B.E. Powell, University of Portsmouth, UK;
J. Stvenson, M. McElhone, Rolls-Royce, UK

4:30 pm - 6:00 pm Poster Session / Social Hour

6:00 pm - 7:15 pm Dinner

ENVIRONMENTAL EFFECTS ON FCG
Session Chair: T. Flournoy, FAA, NJ

7:30 pm - 7:55 pm 11. A Fatigue Crack Growth Mechanism in Al-Alloys Based on Oxidation
S.A. Michel, SASC, Emmen, Switzerland;
M.B. Sayir & M. Textor, SFIT, Zurich, Switzerland;
V. Esslinger, SFL, Dubendorf, Switzerland

7:55 pm - 8:20 pm 12. Pitting Corrosion Effects on Fatigue of Aircraft Al-Alloys
K.K. Sankaran, R. Perez, Boeing Co., St. Louis, MO;
K.V. Jata, WPAFB, Dayton, OH

8:20 pm - 8:45 pm 13. Environmental Effects on FCG Resistance of Landing Gear
AERMET - 100 Steel

Eun Lee, NAWC Pax River, MD;
R. Holtz, K. Sadananda, NRL, DC;
A.K. Vasudevan, ONR, VA

8:45 pm - 9:45 pm Social Hour

Wednesday, September 9, 1998

7:00 am - 8:30 am Breakfast

ENVIRONMENTAL EFFECTS ON FCG (continued)
Session Chair: T. Flournoy, FAA, NJ

8:30 am - 8:55 am 14. Effects of Loading & Waveform on FCG in IN-718
M.R. Bache, W.J. Evans, University of Wales, Swansea, UK;
M. Hardy, DERA, Farnborough, UK

8:55 am - 9:20 am 15. Creep-Fatigue of Small Crack Propagation of a Single Crystal Ni-Base Superalloy
M. Okazaki, Nagaoka University of Technology, Japan;
Y. Yamazaki, Nigata Institute of Technology, Japan

9:20 am - 9:45 am 16. Notch Size Effect of Ti-6Al-4V Undere High Cycle Fatigue Loading
D. Lanning & G. Haritos, Air Force Institute of Technology, Dayton, OH.;
T. Nicholas, WPAFB, Dayton, OH

9:45 am - 10:15am 17. Critical Issues in High Cycle Fatigue
T. Nicholas, WPAFB, Dayton, OH

10:15 am - 10:30 am Coffee Break

MICROSTRUCTURAL EFFECTS ON FCG
Session Chair: H. Doeker, DLR, Germany

10:30 am - 10:55 am 18. Fatigue Damage & Fatigue Lives of Nitrogen Alloyed Duplex Stainless Steels
N. Akdut, SIDMAR, Belgium;
O.B. Pederson, RISO Labs., Denmark

10:55 am - 11:20 am 19. Fatigue Crack Development From Defects in a Cast Aluminum Alloy
W.J. Evans, Z.-J. Lu, J.A. Spittle, IRC, University of Wales, Swansea, UK; J. Devlukia, Rover Group Ltd., Warwick,UK

11:20 am - 11:45 am 20. Superior FCG Properties in Newly Developed Weld Metal
A. Ohta, N. Suzuki, Y. Maeda, K. Horaoka & T. Nakamura National Research Institute, Japan

11:45 am - 12:10 pm 21. Characterizing Dislocation Structures Around Fatigue Cracks in Bulk Fatigues Cu Single Crystals Using ECCI
J. Ahmed, A.J. Wilkinson & S.G. Roberts, University of Oxford, UK

12:10 pm - 1:30 pm Lunch

1:30 pm - 5:00 pm Ad hoc Sessions / Free Time

5:00 pm - 6:00 pm Poster Session / Social Hour

6:00 pm - 7:30 pm Dinner

MICROSTRUCTURES (continued)
Session Chair: D. Robertson, Robins AFB, GA

7:30 pm - 7:55 pm 22. On the Fatigue Behavior of Duplex Stainless Steels
L. Llanes, A. Mateo, M. Anglada, ETSEIB, Spain
P. Villechaise 7 J. Mendez, CNRS, France

7:55 pm - 8:20 pm 23. Fatigue Strength of Al-Alloys 7010-T74 & 7050-T74
A. Carvalho & H. Voorwald, State University of Sao Paulo, Brazil

8:30 pm - 9:30 pm Social Hour

Thursday, September 10, 1998

7:00 am - 8:30 am Breakfast

MICROSTRUCTURES (continued)
Session Chair: H. Doeker, DLR, Germany

8:30 am - 8:55 am 24. Effect of Microstructure & Texture on FCG in Ti-15V-3Al-3Sn-3Cr
S.M. Kazanjian, H. Hatgarter & E.A. Starke, Jr., University of Virginia, VA

8:55 am - 9:20 am 25. Fatigue Threshold Maps of Ni-Ti Alloy Near the Shape Memory Transtion Temperature
R.L. Holtz, K. Sadananda, & M. A. Imam, NRL, DC

9:20 am - 9:45 am 26. Influence of Microstructure on FCG in 7075 Al Alloy
S.E. Stanzl-Tschegg, O. Plasser, E.K. Tschegg, BOKU,Vienna, Austria

9:45 am - 10:00 am Coffee Break

FATIGUE THRESHOLDS
Session Chair: P.E. Bretz, Metcut Research Inc., Ohio

10:00 am - 10:25 am 27. Role of K & Kmax as Crack Driving Forces & The Determination of Keff
H. Doeker, DLR, Koln, Germany

10:25 am - 10:50 am 28. Early Stages of FCG
R. Jaccard, Alusuisse Technology & Management, Switzerland

10:50 am - 11:15 am 29. Classification of FCG Rates in the Compression Region of Load Ratio R<O
A.K. Vasudevan, ONR-332, Arlington, VA;
K. Sadananda, NRL, Washington, DC

11:15 am - 11:40 am 30. Compatibility of Crack Closure & Kmax Dependent Models of FCG
C.R. Krenn & J.W. Morris, Jr., University of California, Berkeley, CA

11:40 am - 12:05 pm 31. FCP Thresholds in Ti-6Al04V Under High Cycle Fatigue Conditions
B.L. Boyce, J.P. Campbell, O. Rider, A.W. Thompson & R.O. Ritchie, University of California, Berkeley, CA

12:15 pm - 1:15 pm Lunch

FRETTING
Session Chair: E. Chen, General Electric Corp., R&D, NY

1:15 pm - 1:40 pm 32. Fretting in Aeronautical & Aerospace Structures & Materials
T.N. Farris, G. Harish, P.A. McVeigh & M.P. Szolwinski, Purdue University, IN

1:40 pm - 2:05 pm 33. An Experimental Investigation of Fretting Fatigue
B. Wittkowsky, P. Birch, J. Dominguez & S. Suresh, MIT, MA

2:05 pm - 2:30 pm 34. Approximate Stresses in 2-D Flat Elastic Contact Fretting Problems
M.R. Urban, Sykorsky Aircraft, CT

2:30 pm - 5:45 pm Ad hoc Sessions and/or Free Time

6:00 pm - 7:00 pm Poster Session / Social Hour

7:00 pm - 9:00 pm Banquet

Friday, September 11, 1998

7:00 am - 8:30 am Breakfast

LIFE PREDICTION MODELING
Session Chair: T. Marchaux, DOE, DC

8:30 am - 8:55 am 35. Use of Fracture Mechanics to Predict Fatigue Initiation Life Under Multiaxial Loading Conditions
Y. Wang & J. Pan, University of Michigan, Ann Arbor, MI

8:55 am - 9:20 am 36. Random FCG in Al-Alloys
S. Ustilovsky & R. Arone, Israel Institute of Metals, Israel

9:20 am - 9:45 am 37. Overload Effects & Accumulative Fatigue Damage Under Variable Amplitude Loading
X. Zheng, Northwestern Polytechnical University, P.R. China

9:45 am - 10:10 am 38. Numerical Estimation of Fatigue Crack Growth
M.S. Duesbery, Fairfax Material Research Inc., VA

10:10 am - 10:25 am Coffee Break

10:25 am - 10:50 am 39. Comparison of Several Contemporary FCG Life Prediction Tools
J.A. Hater, WPAFB, Dayton, OH;
K. Sadananda, NRL, Washington, DC

10:50 am - 11:15 am 40. Fatigue Life Prediction Techniques for Notch Geometries in Ti- Alloys
M.R. Bache, W.J. Evans & M. Tasleem, University of Wales, UK

11:15 am - 11:40 am 41. Role of Inclusion Crack Initiation & Early Crack Growth in Probabilistic Fatigue Life Predictions of PM Alloys
E.Y. Chen, M.F. Henry, GE Corporate R&D, NY;
P.A. Domas, P.G. Roth, GE Aircraft Engines, OH

12:00 noon - 1:30 pm Lunch (and check out. Leave luggage with porter or bring to session room)

APPLICATIONS
Session Chair: D. Simpson, NRC, Canada

1:30 pm - 1:55 pm 42. Evaluation of Simulated FOD in Ti-6Al-4V Fan Blades
T.J. Dunyak & R. McClain, GE Aircraft Engines, OH

1:55 pm - 2:20 pm 43. New Technology Enables Laser Shot Peening to be a Commercially Affordable Process
L.A. Hackel, LLNL, CA &
J.R. Harrison, Metal Improvements Co., Witchita, KS

2:20 pm - 3:30 pm General Technical Discussions

3:30 pm Conference Adjournment

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POSTERS

44. Advanced Eddy Current Sensing for Studying Fatigue Crack Initiation & Growth
N. Goldfine, V. Weiss & M. Natishan, Jentek Inc., MA

45. Shape Memory Effect & TMP for Ti-Ni Obtained Under High Pressure
A.D. Shevchenko, Kiev, Ukraine

46. Local Stress Variability in a Fully-Plastic Metal
L. Lawson, Bradford, PA

47. Crack Propagation During Grain Boundary Embrittlement of Metals & Ceramics by Liquid Metals
B. Bokstein, Steel & Alloys Institute, Moscow, Russia & E. Glickman, Tel Aviv University, Israel

48. Processing Ti-Alloys for Optimum Fatigue Performance
W.J. Evans & M.R. Bache, University of Wales, UK

49. Fatigue Life Prediction & Test Correlation for Automotive Components Under Random Loading
Yi Zhang, D. Yagos & M. Usman, Ford Motor Co., MI

50. Fatigue Testing of Sheet Metals Under Uniaxial Compression & Tension
T.S. Lam & T.H. Topper, University of Waterloo, Canada; F.A. Conle, Ford Motor Co., MI

51. A Multiaxial Rainflow Counting Method
C.C. Chu, Ford Motor Co., MI

52. A Comparison of Fatigue Crack Nucleation at Holes In 2024-T3 & 2524-T3 Al Alloys
P.J. Golden, A.F. Grandt, Jr., Purdue University, IN & G.H. Bray, ALCOA, ATC, Pittsburgh, PA

53. Predictions of Fatigue Life, Crack Nucleation & Crack Propagation Under Non-Proportional Multiaxial Cyclic Loading
K.C. Liu, ORNL, TN

54. Maintainability Improvement Through Corrosion Prediction
D.E. Tritsch, UDRI, Dayton, OH; H.J. Konish, ALCOA, ATC, PA

55. Failure by Cavitation-Life Prediction
R. Mohan & F.W. Brust, Battelle, Columbus, OH

56. Fatigue Crack Nucleation & Growth Rate Behavior of Laser Shock Peened Ti
J. Ruschau & R. John, UDRI, OH; S. Thompson & T. Nicholas, WPAFB, Dayton, OH

57. Crack Growth Modeling of Fibre Metal Laminates
A. Vlot and R.C. Alderliesten, Delft University of Technology, The Netherlands

58. Effects of Corrosion on the Structural Integrity of Aircraft Structures
D.D. Robertson & R.C. Kinzie, Robins AFB, GA

59. Ultrasonic Pulse-Transmit-Receiver Method for Detecting Fatigue Cracks
G.E. Welsch, S. Hailu, I. Mustafa & D. Hazony, Case Western Reserve University, OH

60. Investigation of the Effects of Shed-rate, Initial Kmax, and Geometric Constraint on Kth in Ti-6Al-4V at Room Temperature
J. Sheldon, Pratt & Whitney - United Technologies, FL; J. K. Donald, Fracture Technology, Associates, PA

61. Deterministic Prediction of Corrosion Damage Due to Localized Corrosion
D.D. Macdonald, SRI International, CA

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