Meetings & Events

1998 MRS Fall Meeting & Exhibit

November 30 - December 4, 1998 | Boston
Meeting Chairs:
 Clyde L. Briant, Eric H. Chason, Howard E. Katz, Yuh Shiohara

Symposium M—Fracture and Ductile vs Brittle Behavior - Theory, Modeling, and Experiment

-MRS-

Chairs

Glenn Beltz Univ of California-S Barbara 
Kyung-Suk Kim Brown Univ 
Michael Marder Univ of Texas-Austin 
Robin Selinger Catholic Univ of America

Symposium Support

  • Air Force Office of Scientific Research
  • Army Research Office
  • NIST/Ctr for Theoretical & Computational Matls Science
  • Office of Naval Research

* Invited paper

SESSION M1: DUCTILE-TO-BRITTLE 
TRANSITION I: 
STEELS & STRUCTURAL METALS 
Chairs: Ali S. Argon and Glenn E. Beltz 
Monday Morning, November 30, 1998 
Salon J/K (M)

8:00 AM *M1.1 
UNDERSTANDING THE MECHANICS OF FRACTURE: INTEGRATING A DIVERSITY OF VIEWPOINTS. G. Robert Odette, Dept. of Mechanical Engineering, University of California, Santa Barbara, CA. 

8:30 AM M1.2 
DEVELOPMENT OF A MIXED-MODE FRACTURE MECHANISM MAP AND ITS RELATIONSHIP TO MICROSTRUCTURE AND SHEAR LOCALIZATION.Rajmohan K. Oruganti and M. Manoharan, Division of Materials Engineering, School of Applied Science, Nanyang Technological University, SINGAPORE 

8:45 AM M1.3 
OBSERVATION OF TRAPPING SITES OF HYDROGEN AND DEUTERIUM IN HIGH-STRENGTH STEELS BY SIMS AT DELAYED FRACTURE. Kenichi Takai, Goro Yamauchi, Nippon Telegraph and Telephone Corp., Tokyo, JAPAN. 

9:00 AM M1.4 
EFFECT OF SOLUTE HYDROGEN ON THE FRACTURE RESISTANCE OF FORGED 304L AND 316L STAINLESS STEELS*. B.P. Somerday, N.R. Moody, B.C. Odegard, and S.L. Robinson, Sandia National Laboratories, Livermore, CA. 

9:15 AM *M1.5 
WHAT SANK THE RMS TITANIC? Tim Foecke, Metallurgy Division, National Institute of Standards and Technology, Gaithersburg, MD. 

9:45 AM BREAK 

10:15 AM *M1.6 
SCANNING FORCE MICROSCOPY AS A TOOL FOR FRACTURE STUDIES. Mathias Goken, Frank Thome, Horst Vehoff, Univ. of the Saarland, Dept. of Material Science and Engineering, Saarbruecken, GERMANY. 

10:45 AM M1.7 
QUASI-STATIC BRITTLE FRACTURE. J.A. Pfaendtner, R.C. Muthiah, C.J. McMahon, Jr. University of Pennsylvania, Dept. of Materials Science and Engineering, Philadelphia, PA. 

11:00 AM M1.8 
METALLURGICAL CONTROL OF THE DUCTILE-BRITTLE TRANSITION IN HIGH-STRENGTH STRUCTURAL STEEL. J.W. Morris Jr., Dept. of Materials Science, Univ. of California, Berkeley, CA. 

11:15 AM M1.9 
THE SEPARATION OF THE FRACTURE ENERGY IN METALLIC MATERIALS. Jürgen Stampfl, Erich Schmid Institute for Materials Science, Austrian Academy of Sciences, Leoben, AUSTRIA. (Current address: Rapid Prototyping Lab, Stanford University, Stanford CA), Otmar Kolednik, Erich Schmid Institute for Materials Science, Austrian Academy of Sciences, Leoben, AUSTRIA. 

11:30 AM M1.10 
BRITTLE-TO-DUCTILE TRANSITION (BDT) IN METALLIC ALLOYS. Fereshteh Ebrahimi, Univ of Florida, Materials Science and Eng Dept, Gainesville, FL. 

11:45 AM M1.11 
IN SITU EXAMINATION OF MOVING CRACK TIPS IN ORDERED INTERMETALLICS. J.K. Heuer, N.Q. Lam, P.R. Okamoto, Argonne National Laboratory, Materials Science Div, Argonne, IL; J.F. Stubbins, Univ of Illinois, Dept of Nuclear Engineering, Urbana, IL. 

SESSION M2: DUCTITLE-TO-BRITTLE TRANSITION II: 
CONTINUUM DISLOCATION MODELS 
Chairs: Tim Foecke and Lyle E. Levine 
Monday Afternoon, November 30, 1998 
Salon J/K (M)

1:30 PM *M2.1 
COMPETITION BETWEEN DUCTILE AND BRITTLE BEHAVIOR IN A CRACKED ELASTIC-PLASTIC MATERIAL. Don M. Lipkin, GE Corporate Research & Development, Physical Metallurgy Laboratory, Niskayuna, NY; Lisa L. Fischer and Glenn E. Beltz, University of California, Department of Mechanical & Environmental Engineering, Santa Barbara, CA. 

2:00 PM M2.2 
EFFECT OF CRACK GEOMETRY ON DISLOCATION NUCLEATION THRESHOLD. Lisa Fischer, Glenn Beltz, Department of Mechanical and Environmental Engineering, University of California, Santa Barbara, CA. 

2:15 PM M2.3 
SURFACE STRESS EFFECTS ON DISLOCATION EMISSION PROCESSES. K. Sieradzki, Arizona State Univ., Dept. of Mechanical and Aerospace Engineering, Tempe, AZ; J. Knap, Cal. Inst. Tech., Pasadena, CA. 

2:30 PM M2.4 
TEMPERATURE-DEPENDENT ONSET OF YIELDING IN DISLOCATION-FREE SILICON: EVIDENCE OF A BRITTLE-TO-DUCTILE TRANSITION. R.H. Folk II, M. Khantha, D.P. Pope, V. Vitek, University of Pennsylvania, Dept of Materials Science and Engineering, Philadelphia, PA. 

2:45 PM M2.5 
TEMPERATURE-DEPENDENT ONSET OF YIELDING IN DISLOCATION-FREE SILICON: THEORY AND SIMULATIONS. M. Khantha, M. Ling, R.H. Folk II, D.P. Pope and V. Vitek, Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA. 

3:00 PM BREAK 

3:30 PM M2.6 
EFFECT OF AN EXTERNAL STRESS ON A DISLOCATION-DRIVEN MECHANICAL INSTABILITY IN THREE DIMENSIONAL BULK ELASTIC SOLIDS. Rodrigo Arias and Fernando Lund, Departamento de Física, Facultad de Ciencias Físicas y matemáticas, Universidad de Chile, Santiago, CHILE. 

3:45 PM M2.7 
UNSTABLE NUCLEATION OF DISLOCATIONS AND THE BRITTLE-TO-DUCTILE TRANSITION IN SEMI-BRITTLE MATERIALS. Y.Q. Sun, Department of Materials Science and Engineering, University of Illinois, Urbana, IL. 

4:00 PM M2.8 
FRACTURE TOUGHNESS AND BRITTLE-TO-DUCTILE TRANSITION IN HIGH-TEMPERATURE CERAMICS: 100 MILLION ATOM MOLECULAR DYNAMICS SIMULATIONS. Hideaki Kikuchi, Sanjay Kodiyalam, Aiichiro Nakano, Rajiv K. Kalia, Priya Vashishta, Concurrent Computing Laboratory for Materials simulation, Dept. of Physics & Astronomy, Dept. of Computer Science, Louisiana State University, Baton Rouge, LA; Jose P. Rino, Universidade Federal de Sao Carlos, Sao Carlos, BRAZIL; Ingvar Ebbsjo, Studsvik Neutron Research Laboratory, University of Uppsala, Nykoping, SWEDEN. 

4:15 PM M2.9 
DISLOCATION EMISSION FROM A THIN-FILM-COVERED CRACK. Tong-Yi Zhang, Tianhong Wang and Pin Tong, Dept of Mechanical Engineering, Hong Kong Univ of Science and Technology. 

4:30 PM M2.10 
MOBILITY OF NON-PLANAR SCREW DISLOCATIONS AHEAD OF A MODE III CRACK TIP. Alfonso H.W. Ngan, Haifeng Zhang, Dept of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R. CHINA. 

4:45 PM M2.11 
AN INVESTIGATION ON THE PEIERLS CONCEPT BASED CRACK TIP DISLOCATION NUCLEATION. K.L. Du, Huazhong Univ of Sci & Tech, Dept of Mechanics, Wuhan, CHINA; C.Y. Tang, Hong Kong Polytechnic Univ, Dept of Manufacturing Engineering, Hong Kong, CHINA; C.C. Li, Huazhong Univ of Sci & Tech, Dept of Mechanics, Wuhan, CHINA. 

SESSION M3/J3: JOINT SESSION: 
MULTISCALE MODELING OF 
MATERIALS STRENGTH 
Chairs: Vasily V. Bulatov and Robb M. Thomson 
Tuesday Morning, December 1, 1998 
Salon F (M)

8:30 AM *M3.1/J3.1 
CRYSTAL PLASTICITY MECHANISMS OF CLEAVAGE CRACK ARREST IN SILICON SINGLE CRYSTALS AND THE BRITTLE-DUCTILE TRANSITION IN FRACTURE. A.S. Argon and B.J. Gally, Massachusetts Institute of Technology, Cambridge, MA. 

9:00 AM *M3.2/J3.2 
DISLOCATION DYNAMICS AND PLASTICITY IN SILICON CRYSTALS. Antoine Moulin, Ladislas Kubin, LEM, CNRS-ONERA, Chatillon, FRANCE; Marc Condat, Laboratoire de Metallurgie, Structurale, University Paris-Sud, Orsay, FRANCE; Pirouz Pirouz, CWRU, Dept of Materials Science and Engineering, Cleveland, OH. 

9:30 AM M3.3/J3.3 
A GENERAL METHOD FOR COUPLING ATOMISTIC TO CONTINUUM MECHANICS SIMULATIONS. Andrew A. Quong, John Y. Shu, Wilhelm G. Wolfer, Materials Science and Technology Division, Lawrence Livermore National Laboratory, Livermore, CA. 

9:45 AM BREAK 

10:15 AM *M3.4/J3.4 
COUPLING LENGTH SCALES. FE TO MD TO TB. Jeremy Broughton, School of Management, Yale University, New Haven, CT; Farid Abraham, IBM Almaden, San Jose, CA; Noam Bernstein and Efthimios Kaxiras, Physics Dept., Harvard University, Cambridge, MA. 

10:45 AM *M3.5/J3.5 
ATOMISTIC ASPECTS OF FRACTURE MODELLING IN THE FRAMEWORK OF CONTINUUM MECHANICS. Fabrizio Cleri, ENEA, Divisione Nuovi Materiali, Centro Ricerche Casaccia, Roma, ITALY. 

11:15 AM *M3.6/J3.6 
MESOSCOPIC MODELS FOR GRAIN BOUNDARIES AND INTERFACES. Alexei E. Romanov, A.F. Ioffe Physico-Technical Institute, Russian Academy of Sciences, St. Petersburg, RUSSIA. 

11:45 AM M3.7/J3.7 
PLASTIC DYNAMICS AND BRITTLE VS. DUCTILE FAILURE IN NONCRYSTALLINE SOLIDS. Michael L. Falk, Harvard University, Division of Engineering and Applied Sciences, Cambridge, MA. 

SESSION M4: FRACTURE IN CERAMICS, GLASSES, AND POLYMERS 
Chairs: Michael L. Falk and Don M. Lipkin 
Tuesday Afternoon, December 1, 1998 
Salon J/K (M)

1:30 PM M4.1 
ON THE TRIGGERING OF SHEAR FAULTS IN BRITTLE COMPRESSIVE FAILURE. Erland M. Schulson, Daniel Iliescu, Thayer School of Engineering, Dartmouth College; Carl E. Renshaw, Dartmouth College, Dept. of Earth Sciences, Hanover, NH. 

1:45 PM M4.2 
CRACKS IN NANO-CERAMIC THIN LAYERS. J.Th.M. De Hosson, E. Teeuw, Department of Applied Physics, University of Groningen, Groningen, THE NETHERLANDS. 

2:00 PM M4.3 
BEHAVIOR OF CRACK GROWTH RESISTANCE IN TOUGHENED SILICON NITRIDE CERAMICS. Hiroshi Kawamoto, Kyoji Hiramatsu, Yorinobu Takigawa, R&D Laboratory, Japan Fine Ceramics Center, Nagoya, JAPAN; Akira Okada, Scientific Research Laboratory, Nissan Motor Co. Ltd., Tokyo, JAPAN; Hatsuhiko Usami, Meijo Univ., Nagoya, JAPAN. 

2:15 PM *M4.4 
MULTIMILLION ATOM SIMULATIONS OF CRACK PROPAGATION, FRACTURE, AND NANOINDENTATION IN CERAMIC MATERIALS AND GLASSES. Priya Vashishta, Martina E. Bachlechner, Timothy J. Campbell, Alok Chatterjee, Ingvar Ebbsjo1, Rajiv K. Kalia, Hideaki Kikuchi, Sanjay Kodiyalam, Aiichiro Nakano, Andrey Omeltchenko, Jose Pedro Rino2, Phillip Walsh, and Jinghan Wang, Concurrent Computing Laboratory for Materials Simulations, Department of Physics & Astronomy and Department of Computer Science, Louisiana State University, Baton Rouge, LA; 1Universidade Federal de Sao Carlos, Sao Carlos, S.P. Brazil; 2Studsvik Neutron Research Laboratory, SWEDEN. 

2:45 PM BREAK 

3:15 PM M4.5 
DYNAMIC FRACTURE IN ALUMINA USING LARGE SCALE VARIABLE CHARGE MOLECULAR DYNAMICS SIMULATIONS. Timothy J. Campbell, Rajiv K. Kalia, Aiichiro Nakano, Shuji Ogata*, and Priya Vashishta, Concurrent Computing Laboratory for Materials Simulation, Dept. of Physics & Astronomy, Dept. of Computer Science, Louisiana State University, Baton Rouge, LA; *Dept. of Applied Sciences, Yamaguchi Univ., Ube, JAPAN. 

3:30 PM M4.6 
MOLECULAR DYNAMICS SIMULATION OF NANOINDENTATION OF SILICON NITRIDE. Phillip Walsh, Andrey Omeltchenko, Hideaki Kikuchi, Rajiv K. Kalia, Aiichiro Nakano, and Priya Vashishta, Concurrent Computing Laboratory for Materials Simulation, Dept. of Physics & Astronomy and Dept. of Computer Science, Louisiana State University, Baton Rouge, LA. 

3:45 PM M4.7 
CREEP CAVITATION ENHANCED BY GLASS POCKET FORMATION IN A TETRAGONAL ZIRCONIA DOPED WITH 0.3 WT% PURE SILICA. Koji Morita, Keijiro Hiraga and Yoshio Sakka, National Research Institute for Metals, Tsukuba-shi, JAPAN. 

4:00 PM M4.8 
EFFECT OF TRANSITION TEMPERATURE, STRUCTURE AND ANISOTROPY ON THE DEFORMATION AND FAILURE OF POLYMERS. Robert J. Samuels, School of Chemical Engineering, Georgia Institute of Technology, Atlanta, GA. 

4:15 PM M4.9 
FRACTURE TOUGHNESS AT POLY(STYRENE) AND POLY(METHYL METHACRYLATE) VIA INTERFACIAL COPOLYMER MIXTURES. Hyun-Joong Kim, Bing Tang, Miriam Rafailovich and Jonathan Sokolov, NSF-MRSEC, Gracia Center for Polymers at Engineered Interfaces, Department of Materials Science & Engineering, State University of New York at Stony Brook, NY. 

4:30 PM M4.10 
ATHERMAL FRACTURE VIA ELECTRON TUNNELING. John J. Gilman, UCLA, MSE Dept, Los Angeles, CA. 

4:45 PM M4.11 
STRENGTH AND FRACTURE OF GRAIN BOUNDARIES IN SILICON CARBIDE: A FIRST-PRINCIPLES STUDY. Masanori Kohyama, Dept of Material Physics, Osaka National Research Institute, Ikeda, Osaka, JAPAN. 

SESSION M5: POSTER SESSION 
Chair: Glenn E. Beltz 
Tuesday Evening, December 1, 1998 
8:00 P.M. 
Salons (M)

M5.1 
THE DUCTILE-BRITTLE TRANSITION IN AMORPHOUS ALLOYS. Alexander M. Glezer, Institute for Physical Metallurgy, Moscow, RUSSIA; Vladimir P. Manov, Advanced Metal Technologies Ltd., Even Yehuda, ISRAEL. 

M5.2 
FIB/TEM OBSERVATION OF CRACK TIPS IN Si AT DBTT. Suprijadi and H. Saka, Nagoya University, Dept. of Quantum Engineering, Nagoya, JAPAN. 

M5.3 
DYNAMIC FRACTURE AND INSTABILITY OF COPPER RODS UNDER COMPRESSION. Masao Doyama, T. Matsushima, M. Matsunaga and Yoshiaki Kogure, Teikyo University of Science & Technology, Uenohara, Yamanashi, JAPAN. 

M5.4 
FRACTURE AND DUCTILE VS BRITTLE BEHAVIOR OF METAL GLASS RIBBONS IN DIFFERENT TEMPERATURE RANGES. Sergei Pan, Alexander Slipenyuk, Frantsevich Institute for Problems of Materials Science, Dept of Metastable Alloys, Kiev, UKRAINE. 

M5.5 
INFLUENCE OF TEMPERATURE CONDITIONS ON ROTATION-ISOMERIC REOGROUPINGS AND CHAIN RUPTURE UNDER ELASTIC STRETCHING OF ORIENTED LINEAR POLYETHYLENE. Ulmas Gafurov, Institute of Nuclear Physics, Dept of Polymer Radiation Physics, Tashkent, Ulugbek, UZBEKISTAN. 

M5.6 
MOLECULAR MODEL OF RUPTURE OF STRESSED MACROMOLECULAR CHAIN IN CRYSTALLINE POLYMER. Ulmas Gafurov, Elena Pestrikova, Institute of Nuclear Physics, Dept of Polymer Radiation Physics, Tashkent, Ulugbek, UZBEKISTAN. 

M5.7 
THE FRACTURE OF COMPOSITE MATERIALS: A CHAOTIC APPROACH. RobertoTonelli, Franco Meloni, INFM-Phys. Dept., University of Cagliari,ITALY; Francesco Aymerich, Mechanical Engineering Dept., University of Cagliari, ITALY. 

M5.8 
UNSTABLE STACKING FREE ENERGIES IN SILICON THROUGH EMPIRICAL MODELING. M. de Koning, Department of Nuclear Engineering, Massachusetts Institute of Technology, Cambridge, MA; A. Antonelli, Instituto de Física, Universidade Estadual de Campinas, Campinas - SP, BRAZIL; Martin Z. Bazant, Efthimios Kaxiras, Department of Physics and Division of Applied Sciences, Harvard University, Cambridge, MA; J.F. Justo, Instituto de Física, Universidade de São Paulo, São Paulo - SP, BRAZIL. 

M5.9 
THE INFLUENCE OF MICROSTRUCTURE ON THE FRACTURE AND TENSILE PROPERTIES OF DIE CAST AND THIXOMOLDED MAGNESIUM ALLOYS. Paul E. Thoma, Colleen Hays, Johnson Controls, Inc., Corporate Technology, Milwaukee, MI. 

M5.10 
EMBRITTLEMENT OF FE-CR-AL-ALLOYS. Jan H. Lange, M. Brede, Fraunhofer Institut für Angewandte Materialforschung IFAM, Bremen, GERMANY; Susanne Spindler, Rolf Wittmann, D. Gerthsen, Laboratorium für Elektronenmikroskopie der Universität Karlsruhe LEM, GERMANY; Jutta Klöwer, Krupp VDM GmbH, Werdohl, GERMANY. 

M5.11 
NONISOTHERMAL KINETICS OF CRACKS AND PHASE BOUNDARIES. Lev Truskinovsky, University of Minnesota, Dept. of Aerospace Engineering and Mechanics, Minneapolis, MN. 

M5.12 
NONLINEAR ELASTICITY OF GRANULAR AGGREGATES. H.A. Makse, D.L. Johnson, L.M. Schwartz, Schlumberger Doll Research, Ridgefield, CT; J. Jenkins, Theoretical and Applied Mechanics, Cornell University, Ithaca, NY. 

SESSION M6: HETEROGENEOUS MEDIA AND SCALING 
Chair: Mahadevan Khantha 
Wednesday Morning, December 2, 1998 
Salon J/K (M)

8:00 AM *M6.1 
DYNAMICS OF CRACK FRONTS IN RANDOM MEDIA. Daniel S. Fisher, Physics Department, Harvard University, Cambridge, MA. 

8:30 AM M6.2 
LONG DISTANCE ROUGHNESS OF FRACTURE SURFACES IN HETEROGENEOUS MATERIALS. M. Hinojosa, Facultad de Ingenieria Mechnica y Electrica, Universidad Autonoma de Nuevo Leon, San Nicolos de los Garza, Nuevo Leon, MEXICO; E. Bouchaud, ONERA (DMMP/MS), Chatillon FRANCE; B. Nghiem, Laboratoire CNRS/Saint Gobain Surface du Verre et Interfaces, Aubervilliers FRANCE. 

8:45 AM M6.3 
MOLECULAR DYNAMICS SIMULATION STUDIES OF INTERFACIAL CRACK PROPAGATION. John M. Corbett and Robin L. B. Selinger, Catholic Univ. Physics Dept., Washington, DC. 

9:00 AM M6.4 
EXPERIMENTAL AND ANALYTICAL CHARACTERIZATION OF BRITTLE FRACTURE SURFACES USING FRACTAL AND QUANTUM GEOMETRY. J. J. Mecholsky, Jr., Jon K. West and J. H. Simmons, Dept of Materials Science & Engineering, University of Florida, Gainesville, FL. 

9:15 AM M6.5 
SIZE EFFECTS IN THE TENSILE STRENGTH OF UNIDIRECTIONAL FIBER COMPOSITES. Mahesh Sivasambu, Cornell University, Department of Theoretical and Applied Mechanics, Ithaca, NY; Irene J. Beyerelin, Los Alamos National Laboratory, Center for Materials Science, Los Alamos, NM; S. Leigh Phoenix, Cornell University, Department of Theoretical and Applied Mechanics, Ithaca, NY. 

9:30 AM M6.6 
FIBER DEBONDING ALONG A CRACK FRONT IN PAPER. Heikki Kettunen, Helsinki Univ of Technology, Lab Paper Technology, FINLAND; Kaarlo Niskanen, KCL Paper Science Centre, FINLAND. 

9:45 AM M6.7 
STUDIES OF CRACK PATTERNS IN TWO DIMENSIONAL MEDIA AS RESULTING FROM ION BEAM LIKE OR FREEZING DESTRUCTION. M. Ausloos, N. Vandewalle, and R. D'Hulst, Universite de Liege, Sart-Tilman, Liege, BELGIUM. 

10:00 AM BREAK 

SESSION M7: DYNAMIC FRACTURE 
Chair: Michael P. Marder 
Wednesday Morning, December 2, 1998 
Salon J/K (M)

10:30 AM M7.1 
A NEW APPROACH TO LATTICE MODELS OF FRACTURE. David A. Kessler, Dept. Of Physics, Bar-Ilan Univ, Ramat-Gan, ISRAEL, and Herbert Levine, Dept. Of Physics, UC San Diego, La Jolla, CA. 

10:45 AM M7.2 
DYNAMIC FRACTURE IN SINGLE CRYSTALLINE SILICON. T. Cramer, P. Gumbsch, Max-Planck-Institut für Metallforschung, Stuttgart, GERMANY; A. Wanner, Institut für Metallkunde der Universität Stuttgart, Stuttgart, GERMANY. 

11:00 AM M7.3 
GENERALIZED GRIFITH CRITERION FOR DYNAMIC FRACTURE AND THE STABILITY OF CRACK MOTION AT HIGH VELOCITIES. M. Adda-Bedia1, R. Arias2, M. Ben Amar1, F. Lund21Laboratoire de Physique Statistique de l'Ecole Normale Supérieure, Paris, FRANCE. 2 Departamento de Física, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Santiago, CHILE. 

11:15 AM M7.4 
RESONANT INTERACTION BETWEEN A RUNNING CRACK TIP AND A STRESS WAVE. Rodrigo Ariasa, Fernando Lunda and Bernard NghiembaDepartamento de Física, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile; bSaint Gobain Recherche, Aubervilliers, FRANCE. 

11:30 AM M7.5 
SUPERSONIC DISLOCATIONS AND CRACKS WITH SUBSONIC STRESS FIELDS. Peter Gumbsch, Max-Planck-Institut fuer Metallforschung, Stuttgart, GERMANY; Young Huang, Dept of Mechanical Engineering & Industrial Engineering, University of Illinois, Urbana, IL; Huajian Gao, Division of Mechanics and Computation, Stanford University, Stanford, CA. 

11:45 AM M7.6 
FRACTURE PROPAGATION IN A TWO-DIMENSIONAL CONTINUUM MODEL WITH FRICTIONAL DISSIPATION. Emily S.C. Ching, The Chinese Univ of Hong Kong, Dept of Physics, Shatin, HONG KONG; Hiizu Nakanishi, Kyushu Univ, Dept of Physics, Fukuoka, JAPAN. 

SESSION M8: PLASTICITY I - DEFORMATION OF METALS 
Chairs: Huajian Gao and Robin L.B. Selinger 
Wednesday Afternoon, December 2, 1998 
Salon J/K (M)

1:30 PM *M8.1 
HOW TO DEVELOP A MICROSTRUCTURE-BASED MODEL OF PLASTIC DEFORMATION. Lyle Levine, Robb Thomson (Emeritus), Gabrielle Long, National Institute of Standards and Technology, Gaithersburg, MD; Hussein Zbib, School of Mechanical and Materials Engineering, Wash. State Univ., Pullman, WA. 

2:00 PM M8.2 
IN SITU MEASUREMENT OF THE INSTANTANEOUS DISLOCATION VELOCITIES AND MOBILE DENSITIES IN IRON SINGLE CRYSTALS AT LOW TEMPERATURES. T. J. McKrell and J. M. Galligan, University of Connecticut, Department of Metallurgy and Materials Engineering, Storrs, CT. 

2:15 PM *M8.3 
THE MECHANISM-BASED STRAIN GRADIENT PLASTICITY. Y. Huang, University of Illinois, Dept of Mechanical & Industrial Engineering, Urbana, IL; H. Gao, Div of Mechanics and Computation, Stanford University, Stanford, CA; W.D. Nix, Dept of Materials Science and Engineering, Stanford University, Stanford, CA; J.W. Hutchinson, Div of Engineering and Applied Sciences, Harvard University, Cambridge, MA. 

2:45 PM BREAK 

3:15 PM *M8.4 
ORIENTATION IMAGING MICROSCOPY INVESTIGATION OF THE COMPRESSION DEFORMATION OF A [110] TA SINGLE CRYSTAL. Adam J. Schwartz, Wayne E. King, Geoffrey H. Campbell, James St–lken and John Y. Shu, Chemistry and Materials Science Directorate, University of California, Lawrence Livermore National Laboratory, Livermore, CA; David H. Lassila, B-Division, University of California, Lawrence Livermore National Laboratory, Livermore, CA; David D. Sam, Mechanical Engineering, University of California, Lawrence Livermore National Laboratory, Livermore, CA; Brent L. Adams and Shilei Sun, Department of Materials Science and Engineering, Carneigie Mellon University, Pittsburgh, PA. 

3:45 PM *M8.5 
LARGE-SCALE MOLECULAR DYNAMICS SIMULATIONS OF DISLOCATION INTERSECTION AND JOG MOTION. Shujia Zhou, Los Alamos National Laboratory, Los Alamos, NM. 

4:15 PM M8.6 
ATOMISTIC SIMULATIONS OF DISLOCATION-INTERFACE INTERACTIONS IN THE Cu-Ni MULTILAYER SYSTEM. S. Rao, P.M. Hazzledine, UES Inc., Dayton, OH; D. Dimiduk, Wright Laboratory, WPAFB, OH. 

4:30 PM M8.7 
SPATIOTEMPORAL SCALE EFFECTS ON LARGE STRAIN ATOMISTIC SIMULATIONS. Mark F. Horstemeyer and M.I. Baskes, Center for Materials and Engineering Sciences, Sandia National Laboratories, Livermore, CA. 

4:45 PM M8.8 
MOLECULAR-DYNAMICS STUDY OF COPPER WITH DEFECTS UNDER MECHANICAL STRAIN. Kimmo Kaski, Pekka Heino, and Leonel Perondi, Helsinki Univ of Technology, Lab of Computational Engineering, Espoo, FINLAND; Hannu Hakkinen, Univ of Jyvaskyla, Dept of Physics, Jyvaskyla, FINLAND. 

SESSION M9: PLASTICITY II - CRACK TIP REGION & NANOSCALE CONTACTS 
Chair: Kyung-Suk Kim 
Thursday Morning, December 3, 1998 
Salon J/K (M)

8:00 AM *M9.1 
MESOSCOPIC SIMULATION OF DISLOCATION ACTIVITY AT CRACK TIPS. Alexander Hartmaier and Peter Gumbsch, MPI für Metallforschung, Stuttgart, GERMANY. 

8:30 AM M9.2 
EXPERIMENTAL ANALYSIS OF DEFORMATION INDUCED MICROSTRUCTURE NEAR A CRACK TIP IN A HARDENED COPPER CRYSTAL. Ashraf -F. Bastawros, Division of Engineering and Applied Sciences, Harvard University, Cambridge, MA. 

8:45 AM M9.3 
DYNAMIC SIMULATION OF PLASTIC ZONE FORMATION IN MODE III FRACTURE. Nikolas Zacharopoulos, David J. Srolovitz, Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI; Richard LeSar, Structure/Property Relations, Los Alamos National Laboratory, Los Alamos, NM. 

9:00 AM M9.4 
SIMULATION OF VOID GROWTH AT HIGH STRAIN-RATE. J. Belak and R. Minich, University of California, Lawrence Livermore National Laboratory, Livermore, CA. 

9:15 AM BREAK 

9:45 AM M9.5 
MECHANISMS OF DUCTILE FRACTURE IN CONSTRAINED SILVER THIN FILMS. M.E. Kassner, T.C. Kennedy and K.K. Schrems, Dept of Mechanical Engineering, Oregon State University, Corvallis, OR. 

10:00 AM *M9.6 
TRANSITIONS OF SHEAR RESISTANCE IN A SINGLE-ASPERITY CONTACT. Juan A. Hurtado, Kyung-Suk Kim, Division of Engineering, Brown University, Providence, RI. 

10:30 AM *M9.7 
MAKING, BREAKING, AND SLIDING OF NANOMETER-SCALE CONTACTS. Robert W. Carpick, Sandia National Laboratories, Albuquerque, NM; D. Frank Ogletree, Miquel Salmeron, Lawrence Berkeley National Laboratories, Berkeley, CA. 

SESSION M10: ELECTRONIC ORIGINS OF DUCTILE VS BRITTLE BEHAVIOR 
Chair: Shujia Zhou 
Thursday Morning, December 3, 1998 
Salon J/K (M)

11:00 AM *M10.1 
THE CHARGE REDISTRIBUTION ACCOMPANYING SLIP AND CLEAVAGE: A ROLE FOR ELECTRONIC STRUCTURE CALCULATIONS IN ALLOY DESIGN. M. E. Eberhart, Colorado School of Mines, Department of Chemistry and Geochemistry, Golden, CO; A. Giamei, United Technologies Research Center, Hartford, CN; C. Woodward, UES, Dayton. OH. 

11:30 AM M10.2 
CORRELATION OF TOPOLOGY OF CHARGE DENSITY WITH THE ENERGY AND STABILITY OF PLANAR FAULTS IN METALS-IMPLICATIONS FOR DUCTILE VERSUS BRITTLE BEHAVIOR. M. Herbranson, N. Kioussis, and S.P. Lim, California State Univ. Northridge*, M. Eberhart, Center for Advanced Ceramics, Colorado School of Mines. 

11:45 AM M10.3 
FIRST-PRINCIPLES STUDY OF SODIUM-PROMOTED EMBRITTLEMENT OF ALUMINIUM GRAIN BOUNDARIES. Akira Itoh, Institute of Industrial Science, University of Tokyo, Roppongi, Tokyo, JAPAN; Masanori Kohyama, Dept of Material Physics, Osaka National Research Institute, Ikeda, Osaka, JAPAN; Ryoichi Yamamoto, Institute of Industrial Science, University of Tokyo, Roppongi, Tokyo, JAPAN. 

SESSION M11: INTEGRANULAR/INTERFACIAL FRACTURE 
Chairs: Young Huang John W. Hutchinson and Richard LeSar 
Thursday Afternoon, December 3, 1998 
Salon J/K (M)

1:30 PM *M11.1 
QUANTITATIVE MODELING AND MEASUREMENT OF COPPER THIN FILM ADHESION. Alexei A. Volinsky, M.D. Kriese, William W. Gerberich, University of Minnesota, Dept of Chemical Engineering and Materials Science, Minneapolis, MN; John W. Hutchinson, Harvard University, Division of Engineering and Applied Sciences, Cambridge, MA. 

2:00 PM M11.2 
FINITE ELEMENT ANALSIS OF THERMAL-MECHANICAL STRESS INDUCED FAILURE IN INTERCONNECTS. Xiaoying Yu, Laboratorium fuer Informationstechnologie, Universitaet Hannover, GERMANY; Kirsten Weide, Laboratorium fuer Informationstechnologie, Universitaet Hannover, GERMANY. 

2:15 PM M11.3 
TOUGHNESS IN BIOLOGICAL MATERIALS AND IN LAYERED COMPOSITES FORMED BY EXTRUSION FREEFORM FABRICATION. Paul Calvert and Chad Souvignier, Arizona Materials Labs., Tucson AZ. 

2:30 PM *M11.4 
CHARACTERIZATION OF ADHESION LOSS IN THERMAL BARRIER COATING SYSTEMS BY INDENTATION. Jack Beuth, Aditad Vasinonta, Carnegie Mellon University, Department of Mechanical Engineering, Pittsburgh, PA; Gerald H. Meier, Frederick S. Pettit, Matthew J. Stiger, Department of Materials Science and Engineering, University of Pittsburgh, Pittsburgh, PA. 

3:00 PM BREAK 

3:30 PM *M11.5 
ATOMISTIC MECHANISMS OF INTERGRANULAR FRACTURE. Diana Farkas, Dept of Materials Science and Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA. 

4:00 PM M11.6 
ATOMISTIC MODELING OF GRAIN BOUNDARY FRACTURE IN DIAMOND. O.A. Shenderova1, D.W. Brenner1, Dept. of Materials Science and Engineering, North Carolina State University, Raleigh, NC; A. Omeltchehko2, X. Su2, Louisiana State University, Baton Rouge, LA; L.H. Yang3, Lawrence Livermore National Laboratory, Livermore, CA; A. Nazarov, Institute for Metals Superplasticity Problems, Ufa, RUSSIA. 1Supported by the ONR under contract N00014-95-1-0270 2Supported by U.S. DOE under contract N W-7405-ENG-48 3Supported by AFOSR AND NSF 

4:15 PM M11.7 
MINIMUM SURFACE FORMATION ENERGY FOR INTERGRANULAR FRACTURE IN 3-D. Elizabeth A. Holm, H. Eliot Fang, Gary N. McGovney, Sandia National Laboratories, Albuquerque, NM.