Literature review microstructural aspects of fatigue and fracture behavior of aluminium lithium alloys

Microstructural influences on various aspects of fatigue and fracture behavior of Al-Li-X alloys are reviewed .13; Precipitation hardening and the effect of aging on13; microstructure are briefly discussed. Anisotropy in mechanical properties is found to be a texture related13; phenomenon . Recryystallization . plays a dominant role in13; reducing texture and hence anisotropy. Fine delamination is shown to be dependent on the relative misorientation of13; grains in the short transverse direction and therefore texture-related . Low ductility and low fracture toughness,13; especially in the short transverse direction, are due to13; intergranular fracture . Effects of aging on intergranular13; fracture are discussed . Influence of microstructure on low13; cycle fatigue, fatigue crack growth behavior of long and13; short cracks in Al-Li alloys are reviewed . Microstructural13; features which are detrimental from crack initiation point13; of view are seen to improve long crack growth resistance and do not have significant effect on short surface cracks