An Investigation of Flux Density Determinations.
Abstract
Two unresolved problems associated with magnetic particle inspection are analyzed. These are the determination of flux density requirements and the measurement of flux densities in specimens to be inspected. It is concluded that the development of a mathematical model for the prediction of flux density requirements will require the determination of detectability criteria, the development of a theory of time-dependent diffusion of particles in inhomogeneous fields, and the development of methods for predicting flux leakage distributions associated with flaws. Also, it is suggested that Hall probe measurements of tangential field strengths at the surface of a specimen are probably adequate as a preinspection step to insure proper magnetization. A recommended program of research leading to the development and experimental verification of a mathematical model, and the development of appropriate flux density instrumentation, is presented. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1976
- Accession Number
- ADA040117
Entities
People
- Robert E. Beissner
Organizations
- Southwest Research Institute