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(Color online) LEAP tomographic reconstructions of representative precipitates from an Fe–0.21 C–1.82 Cu–2.67 Ni–1.38 Al–0.51 Mn–1.0 Si–0.04 Nb (at. %) steel solutionized at for and, subsequently, aged at for , illustrating the distribution of Fe (blue), Cu (orange), Ni (green), Al (teal), Mn (mustard), and Si (gray) atoms. Only 20% of the Fe atoms and 50% of the enlarged (not to scale) Cu, Ni, Al, and Mn atoms are displayed for clarity.
Proximity histogram concentration profiles (at. %) for: (a) Cu and Fe; (b) Al and Ni; and (c) Mn and Si. The error bars are statistical uncertainties, where for atomic fraction and total atoms.
Powder diffraction results for an Fe–0.21 C–1.82 Cu–2.67 Ni–1.38 Al–0.51 Mn1.0 Si0.04 Nb (at. %) steel solutionized at for , and, subsequently aged at for . The peak at could not be identified.
Total and substitutional energies determined by first-principles calculations.
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