An Experimental Study on Elevated Temperature Biaxial Bulge Test

摘要

By using biaxial bulge test,it is possible to predict sheet metal forming behavior during hot forming process.The purpose of this study is to obtain materials parameters for elevated temperature forming condition during biaxial bulge test of a nickel base superalloy in hemispherical die.At constant gas pressure,the strain rate in which the metal sheet experiences varies and therefore the strain rate sensitivity can be obtained in a single loading.Biaxial bulge tests on superalloy metal sheet were performed and results are in satisfactory agreement with uniaxial test results at elevated temperature.