Surfaces and Interfaces II: Physical and Mechanical PropertiesJohn Burke The Army Materials and Mechanics Research Center has conducted the Sagamore Army Materials Research Conferences, in cooperation with the Metallurgical Research Laboratories of the Department of Chemical Engineering and Metallurgy of Syracuse University, since 1954. The purpose of the conferences has been to gather together scientists and engineers from academic institutions, industry, and government who are uniquely qualified to explore in depth a subject of importance to the Army, the Department of Defense and the scientific corr.munity. This volume, Surfaces and Interfaces ll: Physical and Mechanical Properties, can be considered a continuation, or perhaps an extension, of the information contained in Surfaces and Interfaces I: Chemical and Physical Characteristics. The emphasis in this volume is focused on: the technological significance of surfaces and interfaces; surface sensitive mechanical properties; environment-sensitive properties; control of grain structure; and composite materials. It is felt that the rather ambitious undertaking of the program committee to place the role of "surfaces and interfaces" in its proper context has been achieved. The balance between basic research findings and more applied research allows the reader a certain degree of latitude in the use of the two volumes. The continued active interest and support of these conferences by Col. C. T. Riordan, Commanding Officer, Dr. E. Scala, Technical Di rector, and J. F. Sullivan, Deputy Technical Director, of the Army Materials and Mechanics Research Center is appreciated. |
Contents
2 | |
Session II | 58 |
Surface Effects on the Mechanical Properties of NonMetals | 95 |
An EPR Investigation of Newly Formed Fracture Surfaces | 139 |
Session III | 154 |
The Role of Brittle Surface Films in StressCorrosion Phe | 183 |
Kinetics of SubCritical Crack Growth in High Strength Materials | 213 |
Session IV | 234 |
Directional Solidification and Composite Structures | 313 |
The Role of Surfaces in Ni Base Superalloys | 353 |
The Role of Surfaces in Superplasticity | 371 |
Session V | 393 |
The Role of Interfaces in Fiber Composites | 417 |
Mechanical Effects of Prominent Structure Elements | 447 |
Segregation at Interphase Boundaries | 455 |
481 | |
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Common terms and phrases
Acta adsorbed adsorption alloys aluminum annealed bond brittle carbides cent Ceramics chemical coating composite copper corrosion crack growth rate crack tip curve dendrite depends diffusion dipole dislocation ductile effects elastic electron embrittlement environment equation equilibrium ergs/cm² eutectic failure fatigue fiber Figure 12 film formation fracture stress fracture surface gradient grain boundary grain boundary hardening high strength inclusion increase interaction interface intergranular layer liquid metal liquid metal embrittlement load material matrix Mechanical Behavior mechanical properties mercury MICRONS nickel notch nucleation observed occur oxide particles phase Phys plane plastic deformation quenching region Research segregation shear strength shear stress shown in Figure single crystal sintering slip solid solidification specimen Steel strain energy strain rate stress concentration structure superalloy superplastic surface energy tarnish tensile strength tensile stress tion Trans vacancies Westbrook Westwood wetting whiskers yield strength yield stress