On the Stress corrosion cracking behaviour of aluminium alloy sheet in an aqueous solution of 3% NaCl + 0.3% H2O2
On the Stress corrosion cracking behaviour of aluminium alloy sheet in an aqueous solution of 3% NaCl + 0.3% H2O2
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On%20the%20Stress%20corrosion%20cracking%20behaviour%20of%20aluminium%20alloy%20sheet%20in%20an%20aqueous%20solution%20of%203%%20NaCl%20+%200.3%%20H2O2
DOI：
10.1002/maco.19940450502
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发表时间：
1994
影响因子：
1.8
通讯作者：
R. Braun
中科院分区：
文献类型：
--
作者：
R. Braun
采用慢应变速率试验技术研究了铝合金薄板在长横向上的应力腐蚀开裂行为。合成环境为3% NaCl + 0.3% H2O2水溶液。在合金2024- t351,8090 - t81和2091 CPHK-T8X中没有观察到SCC敏感性的迹象。合金2091 T8X和6061-T4易发生晶间应力腐蚀开裂。在应变速率低于4·10−7 s−1时，慢应变速率测试技术表明6013-T6合金对SCC有轻微的敏感性。断口形貌显示穿晶应力腐蚀开裂。在低于5·10−7 s−1的应变速率下动态应变的6061-T4试样也观察到穿晶应力腐蚀开裂。添加过氧化氢的3% NaCl水溶液促进了点蚀和晶间腐蚀。这些腐蚀过程造成的延性损失干扰了对慢应变速率测试技术结果的评估。
The stress corrosion cracking (SCC) behaviour of aluminium alloy sheet was investigated in the long transverse direction using the slow strain rate testing technique. The synthetic environment used was an aqueous solution of 3% NaCl + 0.3% H2O2. No indications of SCC sensitivity are observed for the alloys 2024-T351, 8090-T81, and 2091 CPHK-T8X. The alloys 2091 T8X and 6061-T4 are found to be susceptible to intergranular stress corrosion cracking. At strain rates below 4 · 10−7 s−1, the slow strain rate testing technique indicates a slight SCC sensitivity with alloy 6013-T6. Fractography reveals transgranular stress corrosion cracking. Transgranular stress corrosion cracking is also observed with 6061-T4 specimens which are dynamically strained at strain rates below 5 · 10−7 s−1. Aqueous 3% NaCl solution with hydrogen peroxide addition promotes pitting and intergranular corrosion. The loss of ductility caused by these corrosion processes interferes with the evaluation of the results of the slow strain rate testing technique.