Evaluation of models for TRIP and stress-dependent transformation behaviour for the martensitic transformation of the steel 100Cr6

Evaluation of models for martensitic transformation and TRIP via comparison of experiments and simulations

“…New developments in TRIP modelling on the mesoscale can be found in [16 -18], e. g. The Greenwood-Johnson parameter can be alternatively derived from other quantities [9], or it can be determined using measured data [19]. In [1], we found different values for (uniaxial) tension and compression. Thus, we have proposed a 3-d generalisation…”

“…There are formulas allowing to calculate the TRIP strain and the evolution of the forming phase (martensite from austenite, e. g.) via the measured data. Here, we do not want to go into details, thus, we refer to [1]. We use measured data from hollow probes made of the steel 100Cr6 (SAE52100), and supplied by the Foundation Institute of Materials Science (IWT) at Bremen.…”

“…For large stresses, if plastic deformation occurs, there will be strain-dependent martensite forming, up to a limit temperature. Considering only the case of moderate stresses, as in [1], we use the following relation for the stress-dependence of the MS temperature:…”

“…with d 1 , d 2 to be determined by experiments, h 0 m0 is as in K-M, h ms is constant or stress-dependent in accordance with (1). l The approach due to Shi-Zhang-Liu (S-Z-L) [8] reads as…”

“…In [1], we evaluated models for TRIP and SDTB, comparing measured data from uniaxial tension-compression tests with prediction by several model variants. In [2], we evaluated several approaches for stress-free martensitic transformation.…”