DANTE Utility Tools for Material Characterization

CHTGen uses the DANTE material database transformation kinetics and DANTE material models to generate continuous heating diagrams (CHT) and isothermal transformation heating diagrams (TTTH). Carbon in solution, carbon in carbide, carbide size, initial phase composition, and alloy variation from the nominal composition can all be considered. CHT and TTTH generation use the same Material definition.  

CHT Process definition (shown) is defined as starting and ending temperatures and fastest and slowest heating times. TTTH Process definition is defined as the upper and lower temperature bounds and the isothermal holding time.

Both, CHT and TTTH, take advantage of the same Controls definition. Controls include choosing rate based or equilibrium austenite transformation kinetics, activating/deactivating the DANTE Carbon Separation model (for carbon rejection during ferrite formation) and the DANTE Carbide Decomposition model. Control of the maximum changes for phases, temperature, and carbon is also provided.

DI Predictor uses the DANTE material database transformation kinetics and DANTE material models to predict the ideal diameter of a steel alloy. Carbon in solution, carbon in carbide, and alloy variation from the nominal composition can be considered.

Controls for DI Predictor include activating/deactivating the DANTE Tempering model and the DANTE Carbon Separation model (for carbon rejection during ferrite formation). Control of the maximum changes for phases, temperature, and carbon is provided. Hardness units can also be changed (HRC/HV.). 

In addition to the Ideal Diameter, provided in millimeters (mm) under the plot, Jominy Predictor also predicts the hardness and phase fraction profiles as functions of depth.

 The MecFit Parameter definition allows the starting values and the upper and lower parameter values to be defined for fitting data to the DANTE mechanical model. 

 The MecFit Properties definition is used to define the elastic parameters (Young's modulus and Poisson's ratio) as a function of temperature. The elastic parameters are not fit from the experimental data. 

The MecFit  Conditions definition is used to load a data file containing experimental tension/compression data. Stress-strain data as a function of temperature and phase can also be generated using 3rd party software. 

 Phase Options: Allows for selection of the individual phase being fit.

Processing Method: A number of fitting and plotting methods are available, depending on the type of fitting or analysis being conducted. 

 The HTCFit Parameter definition allows the starting values and the upper and lower parameter values to be defined as a function of temperature for time-temperature fitting data for thermal boundary definitions.  

  The HTCFit Data definition is used to load a data file containing time-temperature data (Data File). A file containing the geometry of the probe or part used to gather the time-temperature data is also required (CQT File). Different surfaces can also be considered to have different HTC definitions, but must be defined prior to fitting.  

  The HTCFit Controls definition allows the HTC function type to be selected (time or temperature), as well as setting the number of fitting loops.

The HTCFit Ambient Temperature definition allows the ambient temperature to be defined as a constant or a function of time. The ambient temperature is not fit and must be defined prior to fitting.