Promoting Atomic Scale Engineering by Quantifying Experimental Observations of Dislocation Cores
Abstract
Intermetallic alloys are excellent materials for bridging the gap between atomic level processes and macroscopic properties, because the mechanical behavior of these alloys can be closely related to their dislocation structures. The research support by this grant, and described here, was undertaken to elucidate the relationship between atomic level dislocation core structures, alloy composition, and macroscopic mechanical behavior in a series of Nix,Fe(1-x)3Ge alloys and to develop the techniques necessary to perform microsample tensile tests of single crystalline intermetallic alloys. The results from this study, which are described below, have resulted in 6 journal articles, 5 conference proceedings, numerous conference presentations and two M.S. Dissertations. The dislocation structure observations provide benchmarks for first-principle electronic structure calculations and the availability of microsample testing allows for mesoscale testing of individual grains in a number of structural alloys. Both have proven to be valuable tools for bridging the length scales that govern the mechanical performance of high temperature structural materials.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1998
- Accession Number
- ADA353991
Entities
People
- Kevin J. Hemker
Organizations
- Johns Hopkins University