Abstract
The tensile deformation of several binary and ternary beta-brass alloys has been studied in the temperature range of 25°C–300°C in several liquid metal environments. Additional tests were conducted in aqueous ammoniacal solutions. The degree of susceptibility of each alloy to test environments and the observed crack paths correlated with slip character and stress relaxation phenomena at grain boundaries, as revealed by optical metallography. Manganese additions restricted cross slip and grain boundary jogging phenomena, and increased the susceptibility of beta-brass to embrittlement in gallium solutions. Nickel additions had the opposite effect on each property. Single crystals of beta-brass also revealed severe embrittlement in gallium, with cleavage observed along [100]. Mercury caused less severe embrittlement of single crystals, consistent with intergranular crack paths observed in polycrystalline beta-brass wetted with mercury.
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