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

Anandan, K and Dash, PK (1991) Literature review microstructural aspects of fatigue and fracture behavior of aluminium lithium alloys. Technical Report. National Aeronautical Laboratory, Bangalore, India.

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Abstract

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.

Item Type: Monograph (Technical Report)
Uncontrolled Keywords: Aluminium lithium alloy;Microstruture;Precipitation 13; hardening;Aging;Recrystallization;Intergranular fracture;Delamination;Fatigue crack growth;Fracture toughness;Low cycle fatigue;Crack initiation
Subjects: ENGINEERING > Structural Mechanics
Depositing User: Mr. N A
Date Deposited: 30 Jun 2006
Last Modified: 24 May 2010 04:13
URI: http://nal-ir.nal.res.in/id/eprint/1816

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