Quantification of TRIP Kinetics in Medium Mn Steels by In-situ Magnetic Measurements
Increasing interest of the automotive industry in light,high strength – high formability steels has led to the development of a third generation of advanced high strength steels (AHSS).So-called Medium-Mn alloys belong to this generation of steel.Medium-Mn alloys are ultra-fine-grained dual phase steels containing a mixture of ferrite and retained austenite.The stability of the retained austenite controls the degree to which transformation induced plasticity (TRIP) or twinning induced plasticity (TWIP) may be observed.In the current study; Medium-Mn alloys of varying degrees of austenite stability are studied,all of which exhibit the TRIP deformation mechanism.The kinetics of the phase transformation are evaluated by using in-situ measurements of the magnetic properties of a sample to determine the volume fraction of retained austenite as a function of the plastic strain during tensile testing.Results are compared to phase volume fraction measurements made by X-ray diffraction (XRD).The magnetic measurement is shown to be as robust as XRD while providing a much richer data set with a shorter overall experiment duration.
third generation steels AHSS medium Mn TRIP TWIP magnetic susceptibility Luders bands
CALLAHAN Michael HUBERT Olivier SCHMITT Jean-Hubert
MSSMat, CNRS, CentraleSupélec, Univerité Paris-Saclay, 92290 Chatenay-Malabry, France LMT-Cachan, CNRS UMR 8535, ENS Cachan, Université Paris-Saclay,94235 Cachan Cedex, France
国际会议
成都
英文
450-453
2016-11-16（万方平台首次上网日期，不代表论文的发表时间）