The Study of the Interaction of Intense Picosecond Light Pulse with Materials. Berg-Barrett X-Ray Observation of Annealing and Laser Induced Damage in Zinc
Abstract
The Berg-Barrett x-ray diffraction contrast technique has been utilized to study the process of laser induced damage in a zinc crystal and, also to make observations on the annealing characteristics of the dislocation substructure before and after the laser treatment. Annealing caused individual dislocations to become segmented with various sections of their line lengths becoming parallel to <1010>. This preference for a crystallographic orientation of the dislocations seemed related to the equally important observation that the subboundary 'lineage' structure of the crystals was also largely composed of tilt boundaries of (1010) and (1120) surfaces. The laser induced damage required a threshold energy which caused melting, possible vaporization and appreciable plastic deformation of the matrix material by deformation winning, non-basal slip and micro-kinking. By comparison with the structural rearrangement observed in the pre-annealed specimen, the laser damage zone showed only very retarded changes.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 21, 1971
- Accession Number
- AD0729939
Entities
People
- Carl Cm. Wu
- Chihhi Lee
- Ronald W. Armstrong
Organizations
- University of Maryland