Compositional evolution of microalloy carbonitrides in a Mo-bearing microalloyed steel

C. M. Enloe; K. O. Findley; C. M. Parish; M. K. Miller; B. C. De Cooman; J. G. Speer

doi:10.1016/j.scriptamat.2012.09.027

Compositional evolution of microalloy carbonitrides in a Mo-bearing microalloyed steel

C. M. Enloe, K. O. Findley, C. M. Parish, M. K. Miller, B. C. De Cooman, J. G. Speer

Nuclear Energy Materials Microanalysis

Research output: Contribution to journal › Article › peer-review

44 Scopus citations

Abstract

Molybdenum is known to affect microalloy precipitate evolution during processing in ferrite and austenite, but a unified explanation of the role of Mo in precipitate evolution is still lacking. Experiments and thermodynamic calculations indicate that Mo is incorporated into (Nb,Mo)(C,N) precipitates both in the hot-rolled condition and after reheating to 900 °C. Molybdenum enrichment is reduced after reheating and soaking at 1100 °C. No measurable segregation of Mo to the carbonitride-matrix interface was observed in any condition.

Original language	English
Pages (from-to)	55-58
Number of pages	4
Journal	Scripta Materialia
Volume	68
Issue number	1
DOIs	https://doi.org/10.1016/j.scriptamat.2012.09.027
State	Published - Jan 2013

Funding

Research sponsored by Oak Ridge National Laboratory’s Shared Research Equipment (ShaRE) User Program, which is sponsored by the Office of Basic Energy Sciences, U.S. Department of Energy. This work was partially supported by the IMI Program of the National Science Foundation under Award No. DMR 0843934.The authors are grateful for the continued financial support of the Advanced Steel Processing and Products Research Center at the Colorado School of Mines and its industrial sponsors.

Keywords

Atom probe tomography
Niobium
Precipitation
Scanning transmission electron microscopy
Steels

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abstract = "Molybdenum is known to affect microalloy precipitate evolution during processing in ferrite and austenite, but a unified explanation of the role of Mo in precipitate evolution is still lacking. Experiments and thermodynamic calculations indicate that Mo is incorporated into (Nb,Mo)(C,N) precipitates both in the hot-rolled condition and after reheating to 900 °C. Molybdenum enrichment is reduced after reheating and soaking at 1100 °C. No measurable segregation of Mo to the carbonitride-matrix interface was observed in any condition.",

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AU - Parish, C. M.

AU - Miller, M. K.

AU - De Cooman, B. C.

AU - Speer, J. G.

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AB - Molybdenum is known to affect microalloy precipitate evolution during processing in ferrite and austenite, but a unified explanation of the role of Mo in precipitate evolution is still lacking. Experiments and thermodynamic calculations indicate that Mo is incorporated into (Nb,Mo)(C,N) precipitates both in the hot-rolled condition and after reheating to 900 °C. Molybdenum enrichment is reduced after reheating and soaking at 1100 °C. No measurable segregation of Mo to the carbonitride-matrix interface was observed in any condition.

KW - Atom probe tomography

KW - Niobium

KW - Precipitation

KW - Scanning transmission electron microscopy

KW - Steels

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Compositional evolution of microalloy carbonitrides in a Mo-bearing microalloyed steel

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