Evaluation of shims, gaussmeter, penetrameter, and equations for magnetic particle inspection
Book
·
OSTI ID:207971
- McDonnell Douglas Aerospace, Long Beach, CA (United States)
This paper summary presents an evaluation of shims, gaussmeter, penetrameter, and equations used for magnetic particle inspection. The results of this evaluation show that good indications are obtained on the shims and penetrameter at 30 to 60 gauss. The evaluation also revealed that the equation for longitudinal magnetization in a coil over magnetizes the parts and produces a heavy background of oxide on the surface of the parts. It was also determined that there was no difference in results between parts which were heat treated or annealed. Lastly,it was determined that the upper limit of 31.5A/mm (800A/in.) required by existing standards for circular magnetization also causes over magnetization and gaussmeter readings in excess of 60 gauss. Hence, the requirements in existing standards need to be corrected.
- OSTI ID:
- 207971
- Report Number(s):
- CONF-9510265--; ISBN 1-57117-013-8
- Country of Publication:
- United States
- Language:
- English
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