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- 저자 : Marialaura Tocci (검색결과 1 건)
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Prediction of Microstructure for AISI316L Steel from Numerical Simulation of Laser Powder Bed Fusion
Maria Beatrice Abrami,Marialaura Tocci,Muhannad Ahmed Obeidi,Dermot Brabazon,Annalisa Pola 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.11
Laser powder bed fusion (L-PBF) success in the industrial scenario strongly depends on the ability to manufacture componentswithout defects and with high building rates, but also on the ability to effectively control the microstructure to gain therequired properties in the final component. In this regard, the recently developed numerical simulation software of L-PBFtechnologies can represent an effective tool, since many of them provide solidification data (i.e. temperature gradient andcooling rate) useful for microstructure prediction. In this work, a numerical model was applied to simulate the processingof four single scan tracks of 316L stainless steel processed with different parameters. Temperature and cooling rate aroundthe melt pool were extracted from the numerical model and used to estimate the microstructure cellular arm spacing and themicrohardness. Experimental measurements were then compared with the estimated values revealing good agreement. Thegood agreement between experimental and estimated values shows the advantages of the proposed method for microstructureand microhardness prediction based on numerical modelling as a useful resource for process optimization according to therequired final microstructural features.
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