A method for constructing a hot processing map for a metallic material

Abstract

This invention relates to the field of materials data modeling technology, specifically to a method for constructing a thermal processing map for metallic materials. The method includes the following steps: calculating the true stress-strain sequence; fitting the true stress-strain sequence to a continuously differentiable three-dimensional rheological response surface based on a radial basis function network; performing analytical differentiation on the three-dimensional rheological response surface to extract global strain rate sensitivity field data; calculating the power dissipation efficiency matrix and rheological instability judgment parameters based on the strain rate sensitivity field data; and then generating a thermal processing map. In this invention, by establishing a continuously responding surface model based on global optimization and using analytical derivative solutions to replace the traditional differential calculation of discrete data, the numerical oscillation phenomenon caused by experimental noise is effectively eliminated, ensuring thermodynamic consistency in the constitutive relation calculation process, significantly improving the geometric accuracy of the power dissipation efficiency contour lines, and achieving accurate prediction of the safe processing window for metallic materials under complex thermal deformation conditions.

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