Accession Number : AD0652079

Title :   WARM WORKING OF ARMOR PLATE.

Descriptive Note : Final technical rept.,

Corporate Author : MATERIALS RESEARCH LAB INC RICHTON PARK ILL

Personal Author(s) : O'Shea,R. P. ; Breyer,N. N. ; Ripling,E. J.

Report Date : 15 MAR 1967

Pagination or Media Count : 140

Abstract : Taking advantage of warm working to improve the toughness of armor plate requires that the plates be able to be rolled on present day mills. Calculations indicated that a 50 inch wide steel plate with hardnesses in excess of 400 BHN could not be rolled the required 20 percent in a single pass on existing mills. The plate could be reduced this amount in a multi-pass operation, however. A study of mechanical properties of worked steel showed that armor produced by this technique would be highly anisotropic. Although most studies on strain tempering indicate that the properties of steel are significantly improved by this process, such improvements are not found in the direction of compressive strains. Consequently the processing does not appear promising for armor plate which requires a high level of toughness in all directions. On the other hand, it may be possible to produce dual hardness armor without an interface between the hard and soft layers by means of redundant mechanical working. (Author)

Descriptors :   (*ARMOR PLATE, MECHANICAL WORKING), STEEL, MANGANESE ALLOYS, MOLYBDENUM ALLOYS, TOUGHNESS, TRANSITION TEMPERATURE, HARDNESS, DEFORMATION, TEMPERING

Subject Categories : Fabrication Metallurgy
      Armor

Distribution Statement : APPROVED FOR PUBLIC RELEASE