Effect of ECAP on Mechanical Properties of GH696 Casted Alloy

In order to improve the mechanical properties of casted GH696 alloy,the microstructure and mechanical properties of the alloy after deformation by equal channel angular pressing (ECAP) at 1 000℃ and heat treatment were studied.The results show that the as-casted microstructure had been fined significantly by ECAP.Recrystallization of the alloy would occur after ECAP and followed heat treatment,and the increase of ECAP passes decreased the characteristic of as-casted microstructure gradually and improved the strength and plasticity.The strength and plasticity of the as-casted alloy made by ECAP reached that of as-forged alloy with the same heat treatment ,even if a few of characteristic of as-casted microstructure was remained.