Defect Initiation/Growth and Energy Dissipation Induced by Deformation and Fracture.
Abstract
Based on our capabilities to (a) detect and characterize particle release from surfaces on fast time scales, (b) to measure rapid electrical transients, and (c) to obtain high resolution topographical information utilizing scanning tunneling and atomic force microscopy, we have investigated a number of defect initiation and growth processes which ultimately leads to fracture and energy dissipation. We employ dynamic methods as well as post- fracture examination in polymers, ceramics, metals, and interfaces. We have examined mechanisms, with interpretation and connections between these results and the creation and evolution of defects in materials under mechanical stress. The information we, are acquire with our techniques has important implications concerning dissipation of energy (e.g., plastic deformation, microcracking, crack branching, and crack deflection) which play critical roles in controlling the strength and toughness of materials. Deformation, Crack propagation, Fracture, Particle emission, Fractro-emission, Interfacial failure, Crazing, Electrical transients, Micro-Cracking, Contact charging, Fractography, Scanning tunneling, Microscopy, Atomic force microscopy, Photoluminescence, Chemisorptive electron emission.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 15, 1994
- Accession Number
- ADA280411
Entities
People
- J. T. Dickinson
Organizations
- Washington State University