Stress Corrosion Cracking of Zircaloy-4 in Halide Solutions: Effect of Temperature

Materials Research

S.b. Farina¹  G.s. Duffo¹  J.r. Galvele¹ 

[1] ,Comisión Nacional de Energía Atómica Depto. Materiales Buenos Aires,Argentina

关键词: zirconium;    zircaloy-4;    stress corrosion cracking;    pitting;   

DOI  :  10.1590/S1516-14392002000200004

来源: SciELO

【 摘 要 】

Zircaloy-4 was found to be susceptible to stress corrosion cracking in 1 M NaCl, 1 M KBr and 1 M KI aqueous solutions at potentials above the pitting potential. In all the solutions tested crack propagation was initially intergranular and then changed to transgranular. The effect of strain rate and temperature on the SCC propagation was investigated. An increase in the strain rate was found to lead to an increase in the crack propagation rate. The crack propagation rate increases in the three solutions tested as the temperatures increases between 20 and 90 °C. The Surface-Mobility SCC mechanism accounts for the observation made in the present work, and the activation energy predicted in iodide solutions is similar to that found in the literature.

【 授权许可】

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