Accession Number : AD0786514

Title :   A Magnetic Method of Detecting Shell Casing Defects.

Descriptive Note : Final rept.,

Corporate Author : ARMY MATERIEL COMMAND TEXARKANA TEX INTERN TRAINING CENTER

Personal Author(s) : Baker,Merlin R.

Report Date : MAY 1974

Pagination or Media Count : 54

Abstract : The report presents the results of a technique used to detect defects in shell casings manufactured under the Small Caliber Ammunition Modernization Program. The method of detecting defects is based on the fact that a magnetic flux field is produced about a conductor carrying a current. The technique for testing shell casings was evaluated in the laboratory of 5.56 caliber shell casings. The results of the laboratory tests proved that the magnetic field check is not sensitive to small defects. The lack of sensitivity is due to the fact that the magnetic field about a defect failed to follow the shape of the defect but rather tended to form a concentric symmetrical pattern. (Modified author abstract)

Descriptors :   *Small arms ammunition, *Magnetic detection, *Defects(Materials), *Cartridge cases, Manufacturing, Nondestructive testing, Sensitivity, Reliability

Subject Categories : Test Facilities, Equipment and Methods
      Ammunition and Explosives

Distribution Statement : APPROVED FOR PUBLIC RELEASE