COST reduction is a key objective of modern airframe The 7449 and 7150 plates, respectively 30and 36-mm manufacture. This can be achieved by the design of materials thick, were provided by Pechiney CRV (Voreppe, France) with improved properties leading to weight reduction of the in a solutionized, quenched, and stretched condition (corresairframe structure and, therefore, reduction in fuel cons...

It has been observed during fatigue cracking of AA 7075-T651 that a small percentage of Al7Cu2Fe particles crack during manufacturing or very early in their life. Some of the cracked particles eventually nucleate cracks into the surrounding microstructure, and among these the number of cycles required for nucleation varies widely. It is important to comprehend the mechanics underpinning the obs...

Age-hardenable aluminum alloys used in aerospace structures are susceptible to environment assisted fatigue crack propagation (EFCP). There has been no controlled examination of thin film electrolyte, typically produced by atmospheric exposures, effects on EFCP or inhibition of such cracking. The goal of this research is to understand EFCP and inhibition for atmospheric conditions of important ...

When in the presence of liquid metal environments, structural materials can potentially lose the ability to deform and plastically flow. In the case of a ductile material, the result of this reduction in flow ability is a transition from ductile to brittle behavior, resulting in a brittle-like failure. This phenomenon is known as liquid metal embrittlement (LME) and is a subset of the more comm...

This paper d i s c u s s e s t he m i c r o s t r u c t u r a l f e a t u r e s of aluminium-lithium a l l o y s t h a t i n f luence t h e i r co r ros ion and s t r e s s co r ros ion behaviour. Emphasis has been given t o t h e e f f e c t of mic ros t ruc tu re on s t r e s s co r ros ion c rack i n i t i a t i o n and propagat ion i n Al-Li-Cu-Mg-Zr a l l o y s (e.g. 8090 and 8091). I n p ...