Detection of Critical Defects in the M712 Copperhead Control Section Housing
Abstract
This feasibility study was conducted to determine the inspectability of the M712 Copperhead control section housing for critical surface flaws and cracks which might occur as a result of heat treatment. Inspection is based on a crack inspection map which delineates the zones and associated crack size limits developed by a fracture mechanics analysis study. The allowable crack size within each zone is further categorized as an edge, corner, or surface crack. Any flaw or crack larger than the limit for a particular zone or type would, theoretically, cause a catastropic failure of the control housing as the round was fired. Inspection studies have shown that the eddy current (E.C.) technique is quite sensitive to small flaws and cracks and it was agreed that E.C. offered the greatest success potential as a nondestructive inspection technique for evaluating and accepting cracks which occur in the control housing.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1982
- Accession Number
- ADA122456
Entities
People
- B. D. Woody
- W. R. Randle
Organizations
- Martin Marietta