Hall and Seebeck Measurement System for the Evaluation of Alloy Phase Stability, Microstructure, and Properties

摘要

Hall and Seebeck measurement systems have been specified, purchased, facilitated and calibrated. These systems are assisting in research efforts to develop new analytical approaches, based on electronic tools which have served the electronic industry well, to assess structural materials used in defense assemblies and structures. These electronic systems will develop multiple measurements techniques to assess alloy phase stability, aging, microstructure and properties. Seebeck coefficient measurements have already been correlated with the diffusible hydrogen content in alloy with high transition metal element contents. These results show promise for assessment of hydrogen effects in gun barrel steel, naval nickel aluminum bronze fasteners, and high strength steel welds. Hall and Seebeck measurements have been used to characterize the microstructure in alloy thin films. Research is in progress to develop electronic techniques to determine the susceptibility of sigma formation in superalloys. These electronic techniques will offer rapid non destructive micro structural assessment with quantitative data acquisition for easy long term storage of product quality assurance.