期刊
METALS
卷 12, 期 10, 页码 -出版社
MDPI
DOI: 10.3390/met12101720
关键词
wire arc additive manufacturing; Ni-based alloy; multi-phase field method; solidification; microstructure; CALPHAD database; primally dendrite arm spacing
资金
- Strategic Innovation Program for Energy Conservation Technologies (New Energy and Industrial Technology Development Organization: NEDO) [P16007]
Wire arc additive manufacturing achieves high efficiency and low costs by using a melting wire for directional depositions. In this study, a multi-phase field method coupled with a CALPHAD database is developed to predict solidification microstructure and segregation in Ni-based alloys. The effectiveness of this method is confirmed through experimental measurements.
Wire arc additive manufacturing achieves high efficiency and low costs by using a melting wire for directional depositions. Thermal analyses and the finite element method have been applied to predict residual stress and the deformation of fabricated parts. For Ni-based alloy production, a method for predicting solidification microstructure evolution with segregation is needed in order to design precise heat treatment procedures. In this study, a multi-phase field method coupled with a CALPHAD database is developed to simulate the solidification microstructure evolution of a practical Ni-based alloy. Thermal analyses of a wire arc additive manufacturing model were performed by the process modeling of multi-pass depositions with a running cyclic arc. Solidification microstructure evolution was obtained using the temperature profile in each deposited layer by the multi-phase field method. These predicted microstructures are compared with experimental measurements. It is confirmed that the multi-phase field method coupled with the CALPHAD database is effective for predicting solidification microstructure and segregation in the engineering of Ni-based alloys.
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