Numerical Simulation of the Phase Transformations in Steels: A Case Study on Newly-Developed Multi-Phase Steels for Drop Forgings

Anna Wojtacha,Marek Opiela

doi:10.12913/22998624/130863

Abstract

Numerical Simulation of the Phase Transformations in Steels: A Case Study on Newly-Developed Multi-Phase Steels for Drop Forgings

Highlights

In recent years, there has been a distinct progress in the field of methods and tools which enable the modelling and simulation of manufacturing processes, processing and shaping the microstructure as well as the mechanical properties of engineering materials
The diagram (Fig. 1a) reveals that the austenite is present in a temperature range from about 1472°C to approximately 830°C
The application of the JMatPro software allowed determining the evolution of phase components as a function of temperature under equilibrium conditions, numerically simulate austenite phase transformations and to determine the CCT and TTT curves of the newly developed multiphase steels

Summary

Introduction

There has been a distinct progress in the field of methods and tools which enable the modelling and simulation of manufacturing processes, processing and shaping the microstructure as well as the mechanical properties of engineering materials. Computer aided calculations – used both in scientific research and in the industrial practice, create an opportunity to significantly reduce costs by decreasing the quantity of necessary experiments. In this context, the possibility to model phase transformations and determine the CCT and TTT diagrams becomes crucial, which is principally important for newly elaborated steel grades. The models, based mainly on the Johnson-Mehl-Avrami [1, 17] and Koistinen [23] equations, allow calculating the volume fraction of the transformation product at a given temperature. Thermodynamic models are of great importance [4, 21]

Objectives

Methods

Results

Conclusion