Characterization of Thermomechanical Boundary Conditions of a Martensitic Steel for a FAST Forming Process

Abstract

The present work characterized and modelled the interfacial heat transfer coeffcient and friction coeffcient of a non-alloy martensitic steel, for a novel Fast light Alloy Stamping Technology (FAST) process. These models were validated through temperature evolution, thickness distribution and springback measurements on experimentally formed demonstrator components, which were conducted on a pilot production line and showed close agreement, with less than 10% variation from experimental results. The developed models and finite element simulations presented in this work demonstrate that non-isothermal processes can be precisely simulated with implementation of the accurate thermomechanical boundary conditions.