Orientation Dependence of Stress Corrosion Crack in Cold Rolled Alpha Brass

The phenomenon of stress corrosion cracking has been investigated in its various aspects starting from as early as 1914. Upto date the phenomenon has been investigated at different conditions of temperature, stress, strain, work hardening, heat treatment and grain size in different media. The results indicate that the suceptibility of brass is extreme in presence of ammonia. Suceptibility decreases with grain refininement and alloying of elements such as Si, Ba, Mg, As, P. Various hypotheses have been proposed to explain the phenomenon. But he knowledge
is not yet complete to formulate a general theory to
explain the phenomenolo gy of stress corrosion failure of
alloys. There is general agreement that failur e is due
to combined effects of corrosion and stress. The confu-
sion lie in share of th e responsibilities of the two
agents, corrosion and Stress, in the initiation and propagation of the crack.