Determination of a Set of Constitutive Equations for an Al-Li Alloy at SPF Conditions

Haoxiang Gao, Nan Li, Hongliang Ho, Yanling Zhang, Ning Zhang, Liliang Wang, Jianguo Lin
2015 Materials Today: Proceedings  
Uniaxial tensile tests of aluminium-lithium alloy AA1420 were conducted at superplastic forming conditions. The mechanical properties of this Al-Li alloy were then modelled by a set of physicallybased constitutive equations. The constitutive equations describe the isotropic work hardening, recovery and damage by dislocation density changes and grain size evolution. Based on a recent upgraded optimisation technique, the material constants for these constitutive equations were determined
doi:10.1016/j.matpr.2015.05.056 fatcat:22gps5yntbckrajxr576wxpg4m