Accession Number : AD0754541

Title :   Some Implications of the Role of Non-Equilibrium Metallurgical Reactions in Gun Tube Erosion.

Descriptive Note : Technical rept.,

Corporate Author : WATERVLIET ARSENAL N Y

Personal Author(s) : Pepe,Joseph

Report Date : SEP 1972

Pagination or Media Count : 41

Abstract : Discussed are the metallurgical reactions expected to occur in conventional gun steel (0.35%C) during heating from ambient temperature to various peak temperatures up to the melting point of the alloy for both equilibrium heating and non-equilibrium heating conditions. Corroboration of expected results with experimental data are also discussed. One of the most significant implications of applying non-equilibrium metallurgy theory to gun steel is that a liquid grain boundary film can be formed at temperatures greater than 600F below the equilibrium melting point of the alloy. The interaction of these liquid grain boundaries with mechanical and thermal stresses together with chemical interactions are related to the physical removal of material from the bore surface, i.e., gun tube erosion. (Author)

Descriptors :   (*GUN BARRELS, EROSION), FRACTURE(MECHANICS), STEEL, HEATING

Subject Categories : Metallurgy and Metallography
      Guns

Distribution Statement : APPROVED FOR PUBLIC RELEASE