Tunning the tensile deformation behavior and mechanism of nickel-based superalloy CM247LC by adjusting ageing treatment
Zhenhuan Gao, Peng Zhang, Lifang Jiao, Xiufang Gong, Yong Yuan, X.L. Song
Abstract
We investigate the tensile deformation behavior and mechanism of nickel-based superalloy CM247LC, which has been subjected to various ageing treatment schemes, but possesses almost the same γ′ particle size, at 600°C. It is found that the transition in the deformation mode from particle shearing plus microtwinning to particle shearing accounts for the decrease in the work-hardening rate and tensile strength with ageing temperature. Our study provides a new strategy to design the heat treatment schedule to achieve a good compromise between the strength and plasticity for superalloys by tunning the operative deformation and fracture mechanisms.
Topics & Concepts
SuperalloyMaterials scienceShearing (physics)Ultimate tensile strengthMetallurgyDeformation mechanismDeformation (meteorology)Work hardeningComposite materialStrengthening mechanisms of materialsAlloyHardening (computing)MicrostructureLayer (electronics)High Temperature Alloys and CreepAluminum Alloy Microstructure PropertiesMicrostructure and Mechanical Properties of Steels