Accession Number : ADA953876

Title :   Experimental One-Inch Thick Armor Plate,


Personal Author(s) : Reed,E. L.

Report Date : 24 MAY 1938

Pagination or Media Count : 31

Abstract : The purpose of this investigation was to determine the relation of microstructure of two 1-inch thick experimental armor plate compositions and ballistic properties. Conclusions: (1) A definite increase in the ballistic limit has been determined in 1-inch thick plate which was heat treated for the elimination of grain boundary carbide. (2) The ballistic limit, of both experimental plates, was 460 f.s. in excess of the requirements as of Specification AXS-54-K, dated 4/19/37. (3) It is believed that the presence of elongated nonmetallic inclusions in Plate D-1, and traces of elongated nonmetallic inclusion, as well as some grain boundary carbide, in Plate B-1 is responsible for buttoning and cracking of the plates under 37 MM. bullet impact. (4) The results of this investigation indicate that ballistic properties and microstructure are closely related.

Descriptors :   *Terminal ballistics, *Armor plate, Elongation, Nonmetallic compounds, Cracking(Fracturing), Impact, Carbides, Grain boundaries, Thickness, Microstructure

Subject Categories : Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE