In718合金锤击锻造过程中的本构方程

CONSTITUTIVE EQUATION OF HAMMER FORGING FOR SUPERALLOY IN718 PROCESS

采用对复杂的多道次变形的应力－应变曲线进行简化的新思路，建立了能反映Ｉｎ７１８合金高应变速率锤击锻造过程中的应变、变形速率、变形温度、变形这次与间隙时间等参数间综合影响的本构方程．借助有限元计算方法实现了工业涡轮盘高应变速率锤击锻造过程的数值模拟．

For developing constitutive equation in superalloy In718 hammer forging process, the effect of the forging parameters, such as, strain, strain rate, deformation temperature, deformation steps, and the interval times between two steps, on the flow rule of turbo disc was analyzed in detail. Simplificatin of the multi-pass stress-strain curves has been adopted during the developing of constitutive equation. With the FEM program,the verification of the constitutive equation has been completed at forging shop.