Microsegregation behavior during solidification and homogenization of AerMet100 steel |
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| Authors: | H. E. Lippard C. E. Campbell V. P. Dravid G. B. Olson T. Björklind U. Borggren P. Kellgren |
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| Affiliation: | (1) the Department of Materials Science and Engineering, Northwestern University, 60208 Evanston, IL;(2) the Division of Computational Thermodynamics, Royal Institute of Technology, S-100 44 Stockholm, Sweden |
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| Abstract: | Cast AerMet100 exhibits mechanical properties comparable to the wrought properties of competing ultrahigh-strength steels; however, the segregation behavior had not been quantified under casting conditions. A microsegregation profile of the as-cast ingot was simulated and homogenization treatments were predicted using Thermo-Calc and DICTRA software. Experimental composition analysis confirmed the simulated microsegregation profile, and the homogenization process occurred at a slightly faster rate than predicted. The convergence of theory and experiment demonstrates the feasibility of designing cast alloy compositions assisted by computer simulation to minimize segregation without casting a large experimental matrix of test ingots. |
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