STRESS CORROSION CRACKING OF H62 BRASS IN AMMONIA SOLUTION UNDER COMPRESSIVE STRESS

J Chin Soc Corr Pro

1992, Vol. 12

Issue (3): 221-226 DOI:

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STRESS CORROSION CRACKING OF H62 BRASS IN AMMONIA SOLUTION UNDER COMPRESSIVE STRESS

Sang Can; Chu Wuyang and Hsiao Chimei (University of Science and Technology; Beijing)

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Abstract Stress Corrosion Cracking (SCC)of H62 brass in 1N NH_4OH+5g/L CuCl_2 solution under compressive stress was investigated using notched cross specimen and medifide WOL notched sample. The results showed that SCC could occur if an applide compressive load was larger than a critical value. The threshold stress intensity nucleating SCC from the notch under compressive stress was 20.7 MPam~(1/2), but the corresponding value under tensile stress was 3.5 MPam~(1/2). The fracture surfaces of SCC under compressive stress were quite different from those under tensile stress. The latter was composed of cleavage and quasi-cleavage, but the former was intergranular characterized by parallel striation pattern when K_1<15.3 MPam~(1/2) and mixed fracture when K_1>15.3 MPam~(1/2)(cross specimen). The dislocation structure under compressive stress was also different from that under tensile stress.

Received: 25 June 1992

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Sang Can; Chu Wuyang and Hsiao Chimei (University of Science and Technology; Beijing). STRESS CORROSION CRACKING OF H62 BRASS IN AMMONIA SOLUTION UNDER COMPRESSIVE STRESS. J Chin Soc Corr Pro, 1992, 12(3): 221-226.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1992/V12/I3/221

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