Accession Number : ADA954962

Title :   Metallurgical Examination of Eighteen Pieces of 25/64 Inch Thick Rolled Homogeneous Armor.

Descriptive Note : Final memorandum rept.,

Corporate Author : WATERTOWN ARSENAL LABS MA

Personal Author(s) : Yoffa,M.

Report Date : 16 FEB 1945

Pagination or Media Count : 7

Abstract : Metallurgical examination of 18 pieces of armor plate 25/64-in x 2-in x 8-in cur from heat SCN219-1, rolled by Ford Motor Company and heat treated by Standard Steel Spring Company has been completed. This material spalled badly when tested with cal. .50APM2 ammunition under requirements of AXS-495. The results of this investigation indicae that spalling was due to the presence of segregations of elongated silicate nonmetallic inclusions in the material. This condition was revealed by the torsion test, microscopic examination, and also by 'woodiness' in the fracture test for steel soundness. A woody condition in rolled armor is indicative of poor quality plate and therefore is not desirable in food quality plate.

Descriptors :   ARMOR, COMPANY LEVEL ORGANIZATIONS, FRACTURE(MECHANICS), HOMOGENEITY, METALLURGY, MOTORS, ROLLING(METALLURGY), SPRINGS, STEEL, THICKNESS, TORSION

Subject Categories : Metallurgy and Metallography
      Armor

Distribution Statement : APPROVED FOR PUBLIC RELEASE