New Developments in Physical Simulation of Thermomechanical Processing
Computer modeling has become more and more popular in materials thermomechanical processing due to the development of computation technology. However, it must rely on physical modeling and simulation which provides essential physical property data, boundary conditions, and even validation of the computer model itself. Physical modeling technologies have developed significantly over recent years with the increasing pressure on researchers for new materials and lower production costs. As a result, physical simulation systems have become more capable, accurate, and efficient with higher deformation speeds, more complex stress states, more flexibility in functions, along with easier programming and operation. This paper will focus on a new experimental technique used in physical simulation and discuss the results obtained. The focus is on a new generation of thermomechanical simulator that has been developed. This multi-axis hot deformation (MAXStrain ) system can subject materials to virtually unlimited strain under precise control of strain, strain rate, and temperature. The deformed specimen can be machined for subsequent mechanical property measurements. The MAXStrain system has been used for ultrafine grain and nanometer material development. The strength of an ultrafine grain (<1µm) plain carbon steel (AISI 1018) was doubled after multi-axis thermomechanical controlled hot deformation. The strength of an aluminum alloy (AA5083) reached 560 MPa after a strain of 5 imposed at room temperature compared to 290 MPa with no prior deformation.
David FERGUSON, Wayne CHEN, Roman KUZIAK
ultrafine grain and nano-meter material, multi-axis severe deformation, MAXStrain technology.