Ageing response of a Al–Cu–Li 2198 alloy

Correlation of microstructure and mechanical properties in friction stir welded 2198-T8 Al–Li alloy

“…Five sets of SAED patterns were found. The relatively bright diffraction spots were from Al Al axis, large amount of T1 phase with length of around 50.7 nm was found, which was in good agreement with the precipitation behaviour of 2198 alloy reported by Zhang et al [7]. Fig.…”

“…The third generation of damage-tolerant Al-Li alloys has been investigated these years, with special focus on the precipitation evolution and the mechanical properties. For instance, 2198 alloy relies mostly on the precipitation of the T1 (Al 2 CuLi) phase to achieve its excellent mechanical properties [6,7]. It is also reported that Al-Li 2198-T8 (artificially peak aged) alloy sheet contains a high density of T1 phase with high aspect ratio (approximately thickness of 1.3 nm and diameter of 50 nm) [8].…”

Effect of post weld heat treatment on the microstructure and corrosion behavior of AA2219 aluminum alloy joints welded by variable polarity tungsten inert gas welding

“…The increased Al 2 Cu precipitates resulted in the formation of solute atoms precipitate-free zone (PFZ) around grain boundaries [25,26]. Therefore, the difference of chemical potential generated between Al 2 Cu phase and PFZ.…”

Microstructure and micro-texture evolution during large strain deformation of an aluminium–copper–lithium alloy AA 2195

“…These alloys are candidate materials for both earth storable and cryogenic propellants tanks of satellite launch vehicles [2]. These materials have been successfully used in NASA space shuttle, Falcon-9 [3], Air bus 380 and Boeing 777.…”