A method for evaluation resistance to stress-corosion cracking (SCC) in short transverse direction in high-strength aluminum alloys was examined and was tried to appply to 7N01 alloy. A valid fracture toughness balue can be obtained from the stress-intensity (K
1) determination for the DCB specimen. SCC growth rate da/dt as a function of K
1 in NaCl aqueous solution was determined for the specimens aging treated in different manners. Rankings of da/dt corresponding to region II are consistent with those of SCC resistance developed with a smooth spacimen aged at 120°C for 24h have resistance higher two orders of magnetude than the T4-specimen aged at R.T. for 2months. Over aging treatment T7 (at 180°C for 3h) impproves not so effectively resistance to SCC propagation.
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