NON-TYPICAL SUPERPLASTIC FLOW CHARACTERISTIC, ITS RHEOLOGICAL MODEL AND CONSTITUTIVE EQUATION

The non–typical superplasticity of metallic materials accompanied by higher strain rate sometimes has more applicable value in industry than the typical superplasticity. This paper presents a elastic–plastic–viscous rheological model through measuring and analyzing the superplastic flow characteristics of a superplastic bearing steel and has derived its constitutive equation and analysed the effect of the technological parameters on the rheological parameters.