Investigation of Dynamic Material Response for Model Development.
Abstract
Shear band development in a tungsten heavy alloy has been studied by means of pressure-shear plate impact experiments coupled with finite element calculations. By taking into account the viscoplastic response of the constituents, and by utilizing microstructures obtained by digitizing micrographs of the actual alloy, the principal features of the observed shear band features have been obtained in the calculations. This agreement between theory and experiment has provided insight into the mechanism of shear strain localization in tungsten-based composites. Shear band formation and the resulting microstructures have also been studied in AISI 4330 VAR steel. Transmission electron microscope studies have revealed that the microstructure of the tempered martensite, before and after shear band formation, consists of bcc ferrite grains. The effect of the shear localization is to create thin, highly elongated grains as well as dislocation cell structures. Details of the misorientations between neighboring grains and neighboring cells have been determined.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1994
- Accession Number
- ADA313783
Entities
People
- Rodney J. Clifton
Organizations
- Brown University