Corrosion cracking susceptibility in Al-Li-Cu alloys 2090 and 2096 as a function of isothermal aging time

Two windows, i.e., severely underaged and overaged temper conditions, of stress corrosion cracking (SCC) susceptibility are observed as a function of aging time for AA2096 and AA2090. The SCC path for both alloys in both windows of susceptibility was intergranular/intersubgranular in nature with ext...

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Veröffentlicht in:	Scripta materialia 2000-05, Vol.42 (11), p.1039-1045
Hauptverfasser:	Connolly, Brian J, Scully, John R
Format:	Artikel
Sprache:	eng
Schlagworte:	Aging Aluminum alloys Applied sciences Cross-disciplinary physics: materials science rheology Exact sciences and technology Fatigue, corrosion fatigue, embrittlement, cracking, fracture and failure Fatigue, embrittlement, and fracture Hardness testing Materials science Metals. Metallurgy Physics Stress corrosion Treatment of materials and its effects on microstructure and properties
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Zusammenfassung:	Two windows, i.e., severely underaged and overaged temper conditions, of stress corrosion cracking (SCC) susceptibility are observed as a function of aging time for AA2096 and AA2090. The SCC path for both alloys in both windows of susceptibility was intergranular/intersubgranular in nature with extensive secondary cracking evident. Comparison of these trends to known or likely grain boundary microchemistry, microstructure, and microprecipitation developed during aging suggests two separate controlling metallurgical culprits for SCC susceptibility. (AIAA)
ISSN:	1359-6462 1872-8456
DOI:	10.1016/S1359-6462(00)00333-X