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Development of a simulation approach to microstructure evolution during solidification and homogenization using the phase-field method

J. Imlau, W. Bleck, S. Zaefferer, N. Warnken, A. Drevermann, D. Ma, S. Fries, I. Steinbach

Superalloys, 951-960, (2008)

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A numerical method for the simulation of microstructure formation during the solidification and solution heat treatment of single crystal superalloys is presented. The method is based on the phase-field method, coupled to thermodynamic calculation (CALPHAD) and kinetic databases. Simulations are performed in a representative transverse section of a directionally solidified dendritic array. Calculated as-cast structures form the bases for the subsequent solution heat treatment simulations. The method is applied to simulate microstructure formation in a five component model Ni-base superalloy (Ni-5.8Al-9.0Cr-7.9Ta-8.8W, wt.%). Experiments were carried out for validation and good agreement with the model predictions is

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{"type":"article", "name":"j.imlau20081", "author":"J. Imlau and W. Bleck and S. Zaefferer and N. Warnken and A. Drevermann and D. Ma and S. Fries and I. Steinbach", "title":"Development of a simulation approach to microstructure evolution during solidification and homogenization using the phasefield method", "journal":"Superalloys", "volume":"", "OPTnumber":"", "OPTmonth":"1", "year":"2008", "OPTpages":"951-960", "OPTnote":"", "OPTkey":"microstructure modelling; solidification; solution heat treatment; phase-field; CALPHAD; diffusion; single; crystal solidification", "DOI":""}
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