Stress corrosion cracking of B13, a new high strength aluminium lithium alloy |
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Authors: | B Dav A Conde J de Damborenea |
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Affiliation: | aDepartamento de Corrosión y Protección, Centro Nacional de Investigaciones Metalúrgicas CENIM-CSIC. Av. Gregorio del Amo 8, E-28040 Madrid, Spain |
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Abstract: | The present paper focuses on the study of SCC behaviour of a new Al–Cu–Li alloy. For this purpose, two conventional media – NaCl and NaCl + H2O2 – were used for comparison with commercial alloys 7075 and 8090. This new alloy shows lower susceptibility to SCC than conventional alloys as it does not undergo environmentally-induced embrittlement in NaCl solutions and in 1 M NaCl + 0.3% H2O2 in which the 7075 and 8090 alloys, respectively, undergo environmentally-induced fracture.Solution composition was modified in order to determine the environmental conditions and strain rates under which this new alloy will crack due to a stress corrosion cracking phenomenon. The addition of 0.6 M sulphates to 1 M NaCl + 0.3% H2O2 solution allows the definition of a range of strain rate (between 10−7 and 10−6 s−1) in which this new alloy undergoes stress corrosion cracking. |
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Keywords: | A Al– Li alloys A 8090 A 7075 C Stress corrosion |
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