Accession Number : ADA954269

Title :   Armor Plate - Cast. Metallurgical Examination of Failed Bow Machine Gun Casting from Cadillac Light Tank, M5.

Descriptive Note : Experimental rept.,

Corporate Author : WATERTOWN ARSENAL LABS MA

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

Report Date : 21 OCT 1943

Pagination or Media Count : 19

Abstract : The object of this work was to determine the metallurgical properties of the bow machine gun casting which failed during the abllistic test of the Cadillac M5 hull in the Canadian Cold Test Program. The unsatisfactory shock resistance of the bow machine gun casting at subzero temperatures is correlated with the poor metallurgical properties namely, low alloy content, and resulting inadequate hardenability, and low impact properties. the fracture of the casting was finely crystalline, which is associated with heterogeneous microstructure and poor shock resistance, especially at low temperatures.

Descriptors :   ARMOR PLATE, CANADA, CASTING, FRACTURE(MECHANICS), HETEROGENEITY, IMPACT, LIGHTWEIGHT, LOW TEMPERATURE, MACHINE GUNS, METALLURGY, MICROSTRUCTURE, SHIP BOWS, SHOCK RESISTANCE, TANKS(COMBAT VEHICLES), ARMOR PLATE, CANADA, CASTING, FRACTURE(MECHANICS), HETEROGENEITY, IMPACT, LIGHTWEIGHT, LOW TEMPERATURE, MACHINE GUNS, METALLURGY, MICROSTRUCTURE, SHIP BOWS, SHOCK RESISTANCE, TANKS(COMBAT VEHICLES)

Subject Categories : Properties of Metals and Alloys
      Armor

Distribution Statement : APPROVED FOR PUBLIC RELEASE