Modeling of non-equilibrium partitioning in direct metal deposited copper–iron concentrated alloys

Yin, Daniel; Misra, Amit; Mazumder, Jyoti

doi:10.1557/s43578-022-00487-4

Modeling of non-equilibrium partitioning in direct metal deposited copper–iron concentrated alloys

Journal Article · Thu Jan 20 00:00:00 EST 2022 · Journal of Materials Research

DOI:https://doi.org/10.1557/s43578-022-00487-4· OSTI ID:1841372

^[1]; Misra, Amit ^[2]; Mazumder, Jyoti ^[2]

Univ. of Michigan, Ann Arbor, MI (United States); Texas A&M University
Univ. of Michigan, Ann Arbor, MI (United States)

The direct metal deposition (DMD) additive manufacturing process produces high cooling rates within a small melt pool and can lead to high amounts of solute trapping. These high cooling rates limit diffusion and lead to the formation of non-equilibrium phases. In this work, we utilize a numerical model to calculate the degree of solute trapping, defined as non-equilibrium partitioning. A theoretical case with overall composition fixed to 50Cu-50Fe at.%. was performed to observe the influence of increasing solidification rates. We then simulate DMD of equimolar Cu-Fe powder printed on mild steel substrate and the calculated non-equilibrium phase compositions were consistent with experimental observations reported earlier on this alloy composition. For a single deposited track, cooling rates are high enough to yield significant solute trapping. Here, the degree of solute trapping is highest near the free surface and has a gradient that correlates with the cooling rate gradient.

View Accepted Manuscript (DOE)

Research Organization:: Texas A & M Univ., College Station, TX (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0003857

OSTI ID:: 1841372

Journal Information:: Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 3 Vol. 37; ISSN 0884-2914

Publisher:: Materials Research SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Modeling of non-equilibrium partitioning in direct metal deposited copper–iron concentrated alloys

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