Promoting Atomic Scale Engineering by Quantifying Experimental Observations of Dislocation Cores

摘要

The research was undertaken to elucidate the relationship between atomic level dislocation core structures, alloy composition, and macroscopic mechanical behavior in a series of Ni(x),Fe(1-x)3Ge alloys and to develop the techniques necessary to perform microsample tensile tests of single crystalline intermetallic alloys. 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.