Metallurgical Effects at High Strain Rates

ISBN-13: 9781461586982 / Angielski / Miękka / 2012 / 699 str.

R. Rohde

Opis

A conference on Metallurgical Effects at High Strain Rates was held at Albuquerque, New Mexico, February 5 through 8, 1973, under joint sponsorship of Sandia Laboratories and the Physical Metallurgy Committee of The Metallurgical Society of AIME. This book presents the written proceedings of the meeting. The purpose of the conference was to gather scientists from diverse disciplines and stimulate interdisciplinary discussions on key areas of materials response at high strain rates. In this spirit, it was similar to one of the first highly successful con- ferences on this subject held in 1960, in Estes Park, Colorado, on The Response of Metals to High Velocity Deformation. The 1973 conference was able to demonstrate rather directly the increased understanding of high strain rate effects in metals that has evolved over a period of roughly 12 years. In keeping with the interdisciplinary nature of the meeting, the first day was devoted to a tutorial session of invited papers to provide attendees of diverse backgrounds with a common basis of understanding. Sessions were then held with themes centered around key areas of the high strain rate behavior of metals.

Spis treści

Session A Tutorial Papers.- Shock Wave Physics.- Shock Wave Mechanics.- Numerical Analysis Methods.- Continuum Plasticity in Relation To Microscale Deformation Mechanisms.- Experimental Methods in Shock Wave Physics.- Metallurgical Effects of High Energy Rate Forming.- A Practical Guide To Accurate Grüneisen Equations of State.- Session B Phase Transformations.- Relation Between Dynamic and Static Phase Transformation Studies.- Characteristics of the Shock Induced Transformation in BaF2.- A Theory of the ?? ? Transition in Fe and of Possible Higher Pressure Transitions in Fe and in the Lighter Elements of the First Transition Series.- Presented Discussion.- Remanent Magnetization and Structural Effects Due to Shock In Natural and Man-Made Iron-Nickel Alloys.- Presented Discussion: Shock Induced Melt Transitions in Aluminum and Bismuth.- Discussion: Rapid Melting of Aluminum Induced by Pulsed Electron Beam Exposure.- Session C Dislocation Drag Mechanisms.- Microscopic Mechanisms of Dislocation Drag.- Discussion.- Discussion.- Author’s Reply.- Experimental Measurement of the Drag Coefficient.- Discussion.- Author’s Reply.- The Role of Dislocation Drag in Shock Waves.- Discussion.- Discussion.- Author’s Reply.- Plastic Deformation at Low Temperatures and Drag Mechanisms.- Session D Dislocation Dynamics.- Dislocation Mechanics at High Strain Rates.- Discussion.- A Microdynamical Approach to Constitutive Modeling of Shock-Induced Deformation.- Wave Propagation in Beryllium Single Crystals.- Shock-Induced Dynamic Yielding in Lithium Fluoride Single Crystals.- Effects of Microstructure and Temperature on Dynamic Deformation of Single Crystal Zinc.- Discussion.- Author’s Reply.- A Constitutive Relation for Deformation Twinning in Body Centered Cubic Metals.- Session E Fracture Processes.- Models of Spall Fracture by Hole Growth.- Discussion.- Observations of Spallation and Attenuation Effects in Aluminium and Beryllium From Free-Surface Velocity Measurements.- Effects of Metallurgical Parameters on Dynamic Fracture.- Wave Propagation and Spallation in Textured Beryllium.- The Influence of Microstructural Features on Dynamic Fracture.- Session F Deformation Mechanics.- Work Softening of Ti-6A1-4V Due to Adiabatic Heating.- Thermal Instability Strain in Dynamic Plastic Deformation.- The Propagation of Adiabatic Shear.- Shear Strength of Impact Loaded X-Cut Quartz as Indicated By Electrical Response Measurements (Abstract Only).- Metallurgical Effects at High Strain Rates in the Secondary Shear Zone of the Machining Operation.- Miniature Explosive Bonding With a Primary Explosive.- Session G Microstructural Effects.- Microstructural Effects of High Strain Rate Deformation.- The Substructure and Properties of Explosively Loaded Cu-8.6% Ge.- Fragmentation, Structure and Mechanical Properties of Some Steels and Pure Aluminum After Shock Loading.- Twinning in Shock Loaded Fe-A1 Alloys.- Discussion.- Annealing of Shock-Deformed Copper.- Energy Absorption and Substructure in Shock Loaded Copper Single Crystals.- X-Ray Topography of Shock Loaded Copper Crystals.- The Effect of Heat Treatment on the Mechanical Properties and Microstructure of Explosion Welded 6061 Aluminum Alloy.- Discussion.- Author’s Reply.