Accession Number : ADA954161

Title :   Repair Welded Cast Armor: Metallurgical Examination of Samples from Four Ballistically Tested 2-Inch Thick Plates.

Descriptive Note : Memorandum rept.,

Corporate Author : WATERTOWN ARSENAL LABS MA

Personal Author(s) : Turkalo,A. M. ; Herres,S. A.

Report Date : 28 AUG 1944

Pagination or Media Count : 20

Abstract : The objective of this experiment was to carry out metallurgical examination of subject plates. Metallurgical examination including chemical analyses, macro-examination, hardness surveys, tensile and Charpy V notch impact tests, micro-examination, and Jominy hardenability tests, was carried out on the subject plates. Hardness surveys through the 2-inch thick weld metal repairs showed average hardnesses of 16.5 Rockwell C on one plate and 12.0 - 8.5 on the other three plates. Ballistic limits showed a decrease in penetration resistance with hardnesses. At the low hardness level of the weld metal developed by the quench and draw treatment, satisfactory V notch Charpy impact values were obtained for testing temperatures as low as -40 F. Hardenability determinations and micro-examination indicated that the weld metal has insufficient hardenability to develop a homogeneous martensitic microstructure on water quenching of 2-inch thick sections.

Descriptors :   *METAL PLATES, *METALLURGY, *ARMOR, PLATES, QUENCHING

Subject Categories : Metallurgy and Metallography
      Armor

Distribution Statement : APPROVED FOR PUBLIC RELEASE