INVESTIGATION OF HALL-EFFECT DEVICES FOR FLAW DETECTION IN METALS,
Abstract
The technique of using a Hall generator to plot the flux-leakage due to flaws was established in Frankford Arsenal Report No. R-l581 of February 1961. This effort was extended to study artificial flaws simulating the random slopes and depths encountered in real surface cracks. Improvements were developed in the test instrumentation to allow photographic records to be made via cathode-ray oscilloscope presentations. Determination of vertical flaw depths greater than 30 mils was found to be feasible as in earlier studies. The direction of flaw inclination from the vertical can be determined exactly; the actual angle of inclination can be only roughly determined for all cases. An exact indication of flaw angle was obtained in about 24% of the cases where the flaw specimens were nearly perfect. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1964
- Accession Number
- AD0433895
Entities
People
- Harry Sipler
Organizations
- Frankford Arsenal