Poster Sessions

Sunday, December 6, 1998

4:00 p.m. - 5:30 p.m. Registration

6:00 p.m. - 8:00 p.m. Dinner and Welcome
Conference Chair
Engineering Foundation Liaison

4:00 p.m. - 9:00 p.m. Opening Reception and Social Hour

Monday, December 7, 1998

7:00 a.m. - 8:15 a.m. Breakfast

8:30 a.m. - 8:45 a.m. Introductory Remarks

SESSION I: NUCLEATION OF SMALL CRACKS
Co-Chairs
Prof. C. Laird, University of Pennsylvania, USA
Dr. D.L. Davidson, Southwest Research Institute,USA

8:45 a.m. - 9:30 a.m. Theory of Small Polygonal Shaped Fatigue Crack Initiation
T. Mura, Department of Civil Engineering
Northwestern University, USA

9:30 a.m. - 10:15 a.m. Fatigue Crack Initiation in Metallic Materials
C. Laird, Department of Materials Science and Engineering
University of Pennsylvania, USA

10:15 a.m. - 10:45 a.m. Coffee Break

10:45 a.m. - 11:10 a.m. Micromechanical Simulations of Stage-I Fatigue Crack Growth
V. Doquet, Laboratoire de Mechanique des Solids
Ecole Polytechnique, FRANCE

11:10 a.m. - 11:35 a.m. Subsurface Fatigue Crack Initiation and Growth of Plasma Assisted Duplex Surface Treated Tool Steel
K. Shiozawa, S. Nishino, T. Ohtani and S. Mizuno, Department of Mechanical and Intellectual Systems Engineering
Toyama University, JAPAN

11:35 a.m. - 12:00 noon Effect of Graphite Nodule Distribution on Crack Initiation and Early Growth in Austempered Ductile Iron
P.A.S. Reed, J. Boselli and I. Sinclair, Department of Engineering Materials
University of Southampton, UNITED KINGDOM

12:00 noon - 1:30 p.m. Lunch

1:30 p.m. - 5:30 p.m. Ad hoc Sessions / Free Time

5:30 p.m. - 7:00 p.m. Dinner

SESSION II: SMALL CRACK GROWTH IN STRUCTURAL ALLOYS-I
Co-Chairs
Prof. G. Lütjering, Technical-Universitat Hamburg- Harborg, GERMANY
Dr. J.M. Larsen, Air Force Research Laboratory, USA

7:00 p.m. - 7:40 p.m. Microcrack Propagation in Titanium Alloys
G. Lütjering
Technical Universitat Hamburg-Harburg, GERMANY

7:40 p.m. - 8:20 p.m. The Growth and Analysis of Small Fatigue Cracks at About 10-12 m/cycle in Titanium, Aluminum, and Nickel Alloys
D.L. Davidson
Southwest Research Institute, USA

8:20 p.m. - 9:00 p.m. Effects of Near-Threshold Small-Crack Behavior on Life Prediction of Titanium Alloys Under Turbine Engine Loading Spectra
J.M. Larsen
Materials Directorate, AFRL/MLLN
Air Force Research Laboratory, USA

9:00 p.m. - 9:25 p.m. Microstructural Influences on Fatigue Crack Growth in the Near Alpha Titanium Alloy TIMETAL 834
M.R. Bache
IRC in Materials for High Performance Applications
University of Wales, UNITED KINGDOM

9:25 p.m. - 9:50 p.m. Effect of Crystallographic Orientation on the Short Fatigue Crack Propagation Characteristics in a Titanium Alloy
R.J. Wilson, M.R. Bache and W.J. Evans
IRC in Materials for High Performance Applications,
University of Wales, UNITED KINGDOM

9:50 p.m. - 10:15 p.m. Lower-Bound Thresholds for Large and Small Cracks in High-Cycle Fatigue
B.L. Boyce, J.P. Campbell, O. Roder, and R.O. Ritchie
Department of Materials Science and Mineral Engineering, University of California at Berkeley, USA

10:15 p.m. - 11:00 p.m. Social Hour

Coffee will be served in the back of the meeting room at 8:30 p.m.

Tuesday, December 8, 1998

7:00 a.m. - 8:15 a.m. Breakfast

SESSION III: SMALL CRACKS IN ADVANCED MATERIALS-I. CERAMICS
Co-Chairs:
Prof. R.O. Ritchie, University of California at Berkeley, USA
Prof. Y. Mutoh, Nagaoka University of Technology, JAPAN

8:15 a.m. - 9:00 a.m. The Importance of Small Crack Effects in the Microstructural Development of Advanced Materials
R.O. Ritchie
Department of Materials Science and Mineral Engineering
University of California at Berkeley, USA

9:00 a.m. - 9:45 a.m. Cyclic-Fatigue Crack Initiation and Propagation in Ceramics
H. Kishimoto and A. Ueno
Toyota Technological Institute, JAPAN

9:45 a.m. -10:30 a.m. Small Crack Behavior of Silicon Nitride at Elevated Temperature
Y. Mutoh, Y. Miyashita and S. Zhu
Department of Mechanical Engineering
Nagaoka University of Technology, JAPAN

10:30 a.m. - 11:00 a.m. Coffee Break

11:00 a.m. - 11:45 a.m. Subcritical Growth of Microstructurally Small Cracks in Silicon Nitride Ceramics
R.H. Dauskardt, R. Suryanarayanan and F. Haubensak
Department of Materials Science and Engineering
Stanford University, USA

11:45 a.m. - 12:10 p.m. Small Cracks Effects in Ceramic Materials
C. Gilbert and R.O. Ritchie
Department of Materials Science and Mineral Engineering
University of California at Berkeley, USA

12:30 p.m. - 2:00 p.m. Lunch

2:00 p.m. -5:30 p.m. Poster and Ad hoc Sessions / Free Time

5:30 p.m. - 7:00 p.m. Dinner

SESSION IV: SMALL CRACKS IN STRUCTURAL ALLOYS II
Co-Chairs:
Prof. K.S. Ravichandran, University of Utah, USA
Dr. J. Mendez, L.M.P.M. - E.N.S.M.A., FRANCE

7:00 p.m. - 7:45 p.m. Significance of Crack Shape or Aspect Ratio on the Behavior of Small Surface Cracks in Structural Materials
K.S. Ravichandran
Department of Metallurgical Engineering
University of Utah, USA

7:45 p.m. - 8:30 p.m. Influence of Environment on Short Fatigue Crack Propagation Behavior
J. Mendez
L.M.P.M. E.N.S.M.A., FRANCE

8:30 p.m. - 8:55 p.m. Behavior of a Small Surface Crack in Prestrained Heat- Treated Carbon Steels
M. Goto*, T. Yamamoto*, H. Nisitani** and
N. Kawagoishi***
*Department of Mechanical Engineering, Oita University
**Department of Mechanical Engineering, Kyushu- Sangyo University
***Department of Mechanical Engineering, Kagoshima University, JAPAN

8:55 p.m. - 9:20 p.m. Initiation and Propagation Behavior of Small Fatigue Cracks in HIP-Treated Aluminum Alloy:AC4CII
Y. Ochi*, M. Kubota**, and R. Shibata***
*Department of Mechanical & Control Engineering
University of Electrocommunication
**Department of Mechanical Science & Engineering
Kyushu University, JAPAN
***Casting Technology Research Laboratory
Hitachi Metals Co. Ltd, JAPAN

9:20 p.m. - 9:45 p.m. The Small Crack Problem in Fatigue Lifetime Assessments of Powder Metal Disk Alloys
E.Y. Chen*, P.A. Domas+, P.G. Roth+, and
M.F. Henry*
*GE Corporate Research & Development
+GE Aircraft Engines, USA

10:00 p.m. - 11:00 p.m. Social Hour

Coffee will be served in the back of the meeting room at 8:30 p.m.

Wednesday, December 9, 1998

7:00 a.m. - 8:15 a.m. Breakfast

SESSION V: SMALL CRACKS: THEORY
Co-Chairs:
Dr. J.C. Newman, Jr., NASA Langley Research Center, USA
Prof. K. Tanaka, Nagoya University, JAPAN

8:30 a.m. - 9:15 a.m. Application of Small Crack Theory to Aircraft Components
J.C. Newman, Jr.
NASA Langley Research Center, USA

9:15 a.m. - 10:00 a.m. Small Fatigue Crack Growth, Fatigue Threshlods and Life Prediction Methods for Contact Fatigue
S. Suresh, A.E. Giannakopoulos and T.C. Lindley*
Department of Materialas Science and Engineering
Massachusetss Institute of Technology, USA
* Department of Materials
Imperial College of Science, Technology & Medicine
UNITED KINGDOM

10:00 a.m. - 10:45 a.m. Mechanics of Small Fatigue Crack Propagation
K. Tanaka and Y. Akiniwa
Department of Mechanical Engineering
Nagoya University, JAPAN

10:45 a.m. - 11:15 a.m. Coffee Break

11:15 a.m. - 12:00 noon Unified Approach to Small Crack Growth Analysis
K. Sadananda, and A.K. Vasudevan*
Naval Research Laboratory, USA
*Office of Naval Research

12:00 p.m. - 12:25 p.m. Simulation of Growth of Small Surface Cracks in Polycrystalline Materials: The Role of Anisotropy on Small Crack Behavior
Xu-Dong Li, and K.S. Ravichandran
Department of Metallurgical Engineering
University of Utah, USA

12:30 p.m. - 2:00 p.m. Lunch

2:00 p.m. - 5:30 p.m. Poster and Ad hoc Sessions / Free Time

5:30 p.m. - 7:00 p.m. Dinner

SESSION VI: SMALL CRACKS: EXPERIMENTAL TECHNIQUES / ENVIRONMENTAL EFFECTS
Co-Chairs:
Prof. K. Komai, Kyoto University, JAPAN
Dr. J. Petit, Laboratoire de Mecanique et de Physique des Materiaux, UMR CNRS, FRANCE

7:00 p.m. - 7:40 p.m. Fatigue of Micromaterials
K. Komai, and K. Minoshima
Department of Mechanical Engineering
Kyoto University, JAPAN

7:40 p.m. - 8:20 p.m. How to Measure Small Cracks by Nanosecond Acoustic Microscopy
G.A.D. Briggs, T. Zhai, and J.W. Martin
Department of Materials
Oxford University, UNITED KINGDOM

8:20 p.m. - 9:00 p.m. Observations of Fatigue Slip Bands and Stage I Crack Initiation Process in -Brass by Scanning Atomic-Force Microscopy
Y. Nakai, K. Ohnishi and T. Kusukawa
Department of Mechanical Engineering
Kobe University, JAPAN

9:00 p.m. - 9:40 p.m. Propagation of Fatigue Short Cracks: Interactive Influence of Microstructure, Environment and Closure
J. Petit
Laboratoire de Mecanique et de Physique des Materiaux
UMR CNRS, FRANCE

9:40 p.m. - 10:05 p.m. Short Fatigue Crack Propagation at Spot Welds: Experiments and Simulations
H.F. Henrysson
Department of Solid Mechanics
Chalmers University of Technology, SWEDEN

10:00 p.m. - 11:00 p.m. Social Hour

Thursday, December 10, 1998

7:00 a.m. - 8:15 a.m. Breakfast

SESSION VII: SMALL CRACKS IN ADVANCED MATERIALS-II: COMPOSITES / INTERMETALLICS
Co-Chairs:
Prof. W. Jones, University of Michigan, USA
Dr. B.N. Cox, Rockwell International Science Center, USA

8:30 a.m. - 9:15 a.m. Crack Initiation and Short Crack Growth During Fatigue of Discontinuously Reinforced Aluminum Metal Matrix Composites
W. Jones, J.E. Allison* and M. Caton
Department of Materials Science and Engineering
University of Michigan, USA
*Ford Motor Company, USA

9:15 a.m. - 10:00 a.m. Initiation and Growth Mechanism of Small Fatigue Cracks in SiC/Al Composites
M. Jono
Department of Mechanical Engineering and Systems
Osaka University, JAPAN

10:00 a.m. - 10:45 a.m. Small Cracks in Fibrous Composites
B.N. Cox
Rockwell International Science Center, USA

10:45 a.m. - 11:15 a.m. Coffee Break

11:15 a.m. - 12:00 noon Small Cracks in Intermetallics and Intermetallic-Matrix Composites: Implications to Structural Design
K.T. Venkateeswara Rao
Guidant Corporation, USA

12:00 noon - 12:25 p.m. An Investigation of The Propagation of Short Fatigue Cracks in Gamma-Based Titanium Aluminide Intermetallics
Y. Li, D. Deluca and W.O. Soboyejo
Department of Materials Science and Engineering
Ohio State University, USA

12:30 p.m. - 2:00 p.m. Lunch

2:00 p.m. - 5:00.p.m. Ad hoc Sessions / Free Time

SESSION VIII: APPLICATION RELEVANT ASPECTS OF SMALL CRACKS-I
Co-Chairs:
Prof. Y. Murakami, Kyushu University, JAPAN
Dr. A. F. Blom, Aeronautical Institute of Sweden, SWEDEN

3:30 p.m.- 5:40 p.m. Cause of Unsuccessful Results of Miner's Rule: Behavior of Small Fatigue Crack Growth under Repeated Two Step Loadings
Y. Murakami*, K. Matsuda**
*Department of Mechanical Science and Engineering
Kyushu University, JAPAN
** Department of Mechanical Engineering
Kyushu Institute of Technology, JAPAN

5:40 p.m. - 6:20 p.m. Spectrum Fatigue of Joints- The Influence of Small Flaws on Long Fatigue Lives
A.F. Blom
Aeronautical Institute of Sweden, SWEDEN

6:20 p.m. - 6:45 p.m. The Growth of Small Fatigue Cracks in Airframe Structures
R.S. Piascik
NASA Langley Research Center, USA

6:45 p.m. - 7:10 p.m. Initiation and Growth Behavior of Small Fatigue Cracks in Nickel-Base Superalloy at Elevated Temperatures
Q. Chen*, N. Kawagoishi*, H. Nisitani**, M. Goto*** and E. Kondo*
*Faculty of Engineering, Kagoshima University, JAPAN
**Faculty of Engineering, Kyushu Sangyo University, JAPAN
***Faculty of Engineering, Oita University, JAPAN

7:10 p.m. - 7:35 p.m. Equivalent Initial Flaw Size Using Small Crack Growth Data
R.P. Bell, S. Shah and R.E. Alford
Lockheed Martin Aeronautical Systems, USA
Warner Robins Air Logistics Command, USA

7:35 p.m. - 8:00 p.m. Fatigue Crack Growth Behavior of Small Cracks Emanating from a Corner Notch
B.K. Parida, C.M. Manjunatha and B.K. Dash
Structural Integrity Division
National Aerospace Laboratories, INDIA

7:00 p.m. - 9:30 p.m. Luau and Social Hour

Friday, December 11, 1998

7:00 a.m. - 8:15 a.m. Breakfast

SESSION IX: APPLICATION RELEVANT ASPECTS OF SMALL CRACKS-II
Co-Chairs:
Prof. D. Nowell, University of Oxford, UNITED KINGDOM
Prof. A.J. McEvily, University of Connecticut, USA

8:30 a.m. - 9:15 a.m. Small Crack Methodologies and Crack Arrest in Fretting Fatigue
D. Nowell and J.A. Araujo
Department of Engineering Science
University of Oxford, UNITED KINGDOM

9:15 a.m. - 10:00 a.m. Effects of Small Defects on the Fatigue Strength of Steel and Ductile Iron Under Combined Axial/Torsional Loading
M. Endo
Department of Mechanical Engineering
Fukuoka University, JAPAN

10:00 a.m. - 10:30 a.m. Coffee Break

10:30 a.m. -11:15 a.m. On Fatigue Damage and Small Crack Growth Behavior of Silicon Nitride Under Cyclic Thermal Shock Loading
S. Ishihara, T. Goshima, A.J. McEvily* and T. Ishizaki*
Department of Mechanical Engineering Sciences
Toyama University, JAPAN
*Department of Metallurgy and Materials Engineering
University of Connecticut, USA

11:15 a.m. - 11:40 a.m. Effect of Loading Sequence on Fatigue Damage Under Push-Pull Followed by Torsion and Torsion Followed by Push-Pull
K. Takahashi and Y. Murakami
Department of Mechanical Science and Engineering
Kyushu University, JAPAN

11:40 a.m. - 12:05 noon The Role of Multiaxial Stresses in the Development of Small Fatigue Cracks in Turbine Engine Blades
M.D. Sensmeier and T. Tibbals
Sverdrup Technology / AEDC Group
Arnold Engineering Development Center, USA

12:00 noon Lunch and adjourment

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POSTERS

The Poster Sessions will be Tuesday afternoon.

1. The Effects of Stress Ratio and Dwell Loading on Short Fatigue Crack Growth in the Titanium Alloy TI 6246
J.P. Jones, M.R. Bache, W.J. Evans and M.Hill
IRC in Materials for High Performance Applications
University of Wales, UNITED KINGDOM

2. The Mechanism of Initiation and Coalescence of Short Fatigue Cracks in Stainless Steel AlSi316
Z. Shaikh
United Refrigeration Industries Ltd., PAKISTAN

3. Small Fatigue Crack at 5383 Aluminium Weldments
M Neil James
School of Mechanical Engineering, University of Plymouth, UNITED KINGDOM

4. The Growth of Small Corrosion Fatigue Cracks in Medium Carbon Steels
N. Bellorin-Patirio
Faculty of Engineering, Department of Technology and Design, University of Los Andes, VENEZUELA

5. Short Fatigue Crack Initiation and Growth in Journal Bearing
M.R. Joyce*, S. Syngellakis**, J. Boselli*, J. Sinclair* and P.A.S. Reed*
Department of Engineering Materials* and Department of Mechanical Engineering**
University of Southampton, UNITED KINGDOM

6. Crack-Origin Dependent Fatigue Behavior of -Titanium Alloy: Ti-10V-2Fe-3Al
S.K. Jha and K.S. Ravichandran, Department of Metallurgical Engineering, University of Utah, USA

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