抄録
The influence of specimen cutting direction on the susceptibility of stress corrosion cracking (SCC) in an extruded magnesium alloy AZ80 was investigated. The materials were extruded after the T4 or T6 heat treatment. The L- and R-specimens were prepared in the extrusion and radial directions respectively. SCC susceptibility was evaluated by a slow strain rate tensile test in 0.004wt% NaCl solution SCC susceptibility of L-specimen was higher than that of R-specimen. This is because of the difference in the SCC susceptibility. On the other hand, the SCC susceptibility of R-specimen increased by T6 heat treatment, resulting from the precipitation of p phase. These results suggest that SCC susceptibility of magnesium alloy is related with texture orientation.
