Metal Forming Interrelation Between Theory and Practice

1. Front Matter

   Pages i-xv

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2. Extrusion

   1. Study of Flow through Conical Converging Dies

      • Betzalel Avitzur

      Pages 1-46

   2. Selection of Operating Parameters to Prevent Central Bursting Defects During Cold Extrusion

      • Z. Zimerman, H. Darlington, E. H. Kottcamp Jr.

      Pages 47-62

   3. The Effect of Material Properties on Tension Zone and Boundary Shear-Stress in Extrusion

      • Aly H. Shabaik

      Pages 63-83

   4. Application of Visioplasticity Techniques to Axisymmetric Extrusions

      • R. Medrano, P. Gillis, C. Hinesley, H. Conrad

      Pages 85-113

   5. The Extrusion of Rate Sensitive Materials

      • J. J. Jonas, T. Chandra

      Pages 115-129

   6. Deformation Criteria for Predicting the Cold-Extrusion Pressures of Metals

      • L. J. Kashar, R. W. Dunlap, T. E. O’Connell

      Pages 131-161

3. Drawing and Sheet Metal Forming

   1. The Effect of Homogeneity on the Formability of 7000 Series Aluminum Alloys for Cartridge Cases

      • S. A. Levy, C. Baker

      Pages 163-183

   2. Effect of Plastic Anisotropy on Drawing Characteristics of Aluminum Alloy Sheet

      • R. W. Rogers Jr., W. A. Anderson

      Pages 185-198

   3. Analyses of Deformation and Texture as Functions of Fabrication in Mandrel-Drawn Tubing

      • D. O. Hobson

      Pages 199-213

   4. Experimental Evaluation of Theoretically Ideal Drawing Dies

      • M. L. Devenpeck

      Pages 215-234

   5. The Application of the Avitzur Upper Bound Equation to Tungsten Wire Drawing and its Use in Die-Line Design

      • James A. Mullendore

      Pages 235-248

4. Forming Loads and Friction

   1. Computer Simulation to Predict Load, Stress, and Metal Flow in an Axisymmetric Closed-Die Forging

      • Taylan Altan

      Pages 249-273

   2. The Validity of Simulating Tests in Evaluating Lubricants for Deformation Processes

      • John A. Schey

      Pages 275-292

   3. A New Method for the Determination of Material Flow Stress Values under Metalworking Conditions

      • George Saul, Alan T. Male, Vincent DePierre

      Pages 293-306

   4. Force Requirements and Friction in Warm Working Operations

      • John T. Berry, Malcolm H. Pope

      Pages 307-324

5. Workability

   1. Theories and Experiments on Friction, Deformation, and Fracture in Plastic Deformation Processes

      • Shiro Kobayashi

      Pages 325-347

   2. The Use of Workability Test Results to Predict Processing Limits

      • A. L. Hoffmanner

      Pages 349-391

   3. Hot Workability Testing Techniques

      • H. J. McQueen, J. J. Jonas

      Pages 393-428

   4. Simulation of Extrusion Structures by Means of Torsion Testing for a High Strength Nickel-Base Alloy, Udimet 700

      • Conrad M. Young, Oleg D. Sherby

      Pages 429-451

On October 21 and 22, 1970, the Shaping and Forming Committee, Institute of Metals Division, The Metallurgical Society of AlME, held a Conference on "The Relation Between Theory and Practice it). Metal Forming" at the Sheraton-Cleveland Hotel during the Fall Meeting of AIME in Cleveland, Ohio. This conference was devoted to recent applications of theory to metal forming to establish a milestone in the current ability to predict phenomena during deformation processing and, thereby, demonstrate the utility of theory for process design. The papers were selected by first requesting presentations of relevant recent work from 68 recognized authorities in metal forming which resulted in 17 papers. A sub­ sequent call for papers resulted in the submission of 19 abstracts from which 4 papers were selected. The selection criteria required that the paper coupled theory with practice, and that the work was recent, unpublished and worthy of permanent record. The selection was performed by the Conference Chairman. The papers in this volume have been organized in accordance with the following subjects: Extrusion Drawing and Sheet Metal Forming Forming Loads and Friction Workability These papers appear to assess the salient recent applications of mechanics to the deformation processing of alloys at the present time, i. e. , circa 1970, A, L. Hoffmanner Conference Chairman May, 1970 vii LIST OF CONTRIBUTORS Taylan Altan, Metalworking Division, Columbus Laboratories, Battelle Memorial Institute, Columbus, Ohio W. A.

• alloy
• deformation
• design
• extrusion
• friction
• material
• mechanics
• metals
• nickel
• process design
• processing
• sheet metal
• sheet metal forming
• structure

• Materials Technology Equipment Group of TRW, Inc., Cleveland, USA

  A. L. Hoffmanner

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