Hot Deformation Constitutive Equation of Spray Formed Superalloy GH742y

Xuemin Zhang,Fuwei Kang,Fuyang Cao,Hongyan Yue,Yicheng Feng,Haichao Li,Zhiwei Wang,Erjun Guo

IFOST), 2013 8th International Forum（2013）

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摘要

Isothermal compression of spray formed superalloy GH742y has been conducted on Gleebe-1500D hot simulation at the deformation temperatures ranging from 930°C to 1020°C where the strain rates have ranged from 0.01s-1 to 10s-1, and the height reduction of 50%. The effect of deformation temperatures and strain rates on the flow stress was analyzed with the true stress-true strain curve, and the hot deformation constitutive equation of superalloy GH742y was established using Arrhenius type hyperbolic sine equations. Error analysis shown that the established constitutive equations were coincident with experimental data well, and it provided the theory basis to make forging technology of superalloy GH742y.

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关键词

flow stress,temperature 930 degc to 1020 degc,chromium alloys,isothermal compression testing,spraying,molybdenum alloys,superalloys,aluminium alloys,stress-true strain curve,error analysis,plastic flow,plasticity,nickel-based gh742y alloy,spray formed superalloy gh742y,forging,nickel alloys,compressive testing,nicrmowtinbcoal,arrhenius type hyperbolic sine equations,gleebe-1500d hot simulation,titanium alloys,tungsten alloys,compressibility,cobalt alloys,niobium alloys,deformation temperature,stress-strain relations,hot deformation constitutive equation,aging,ageing,hyperbolic equations,strain rates

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