A STUDY ON THE BOSS FORMING PROCESS OF AZ31 MG ALLOY SHEET

Abstract

A series of boss forming tests has been carried out using an AZ31 Mg alloy sheet at 250 A degrees C, 300 A degrees C, and 350 A degrees C with various lubrication conditions to obtain optimum process conditions. The Mg alloy sheet had a homogeneous distribution of very fine sized grains. Surface defects generated during boss forming process could be reduced by changing the friction conditions, as prescribed by FEM analysis using the DEFORM 2D program. The modified boss forming process, lubricating only on the front side, was found to be successful in manufacturing the boss without defects.