The temporal evolution of the decomposition of a concentrated multicomponent Fe-Cu-based steel

R. Prakash Kolli; David N. Seidman

doi:10.1016/j.actamat.2007.12.044

The temporal evolution of the decomposition of a concentrated multicomponent Fe-Cu-based steel

R. Prakash Kolli^*, David N. Seidman

^*Corresponding author for this work

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

202 Scopus citations

Abstract

The nucleation (to a limited extent), growth and coarsening behavior of Cu-rich precipitates in a concentrated multicomponent Fe-Cu-based steel aged at 500 °C from 0.25 to 1024 h is investigated. The temporal evolution of the precipitates, heterophase interfaces, matrix compositions and precipitate morphologies are presented. With increasing time, Cu partitions to the precipitates, Ni, Al and Mn partition to the interfacial region, whereas Fe and Si partition to the matrix. Coarsening time exponents are determined for the mean radius, 〈R(t)〉, number density, N_V(t), and supersaturations, which are compared to the Lifshitz-Slyzov-Wagner (LSW) model for coarsening, modified for concentrated multicomponent alloys by Umantsev and Olson (UO). The experimental results indicate that the alloy does not strictly follow UO model behavior. Additionally, we delineate the formation of a Ni-Al-Mn shell with a stoichiometric ratio of 0.51:0.41:0.08 at 1024 h, which reduces the interfacial free energy between the precipitates and the matrix.

Original language	English (US)
Pages (from-to)	2073-2088
Number of pages	16
Journal	Acta Materialia
Volume	56
Issue number	9
DOIs	https://doi.org/10.1016/j.actamat.2007.12.044
State	Published - May 2008

Funding

This research is supported by the Office of Naval Research (N00014-03-1-0252), Dr. Julie Christodoulou grant officer. Atom-probe tomographic analyses were performed at the Northwestern University Center for Atom-probe Tomography (NUCAPT), and the LEAP™ tomograph was purchased with funding from the NSF-MRI (DMR-0420532, Dr. Charles Bouldin, monitor) and ONR-DURIP (N00014-0400798, Dr. Julie Christodoulou, monitor) programs. Additionally, the LEAP™ tomograph was enhanced in late April 2006 with a picosecond laser with funding from ONR-DURIP (N0014-06-1-0539, Dr. Julie Christodoulou, monitor). This work made use of Central Facilities supported by the MRSEC Program of the National Science Foundation (DMR-0520513) at the Materials Research Center of Northwestern University. The TEM work was performed in the EPIC facility of NUANCE Center at Northwestern University. NUANCE Center is supported by NSF-NSEC, NSF-MRSEC, Keck Foundation, the State of Illinois, and Northwestern University. We extend our gratitude to Professor Emeritus Morris E. Fine, Research Professor Semyon Vaynman, and Research Assistant Professor Dieter Isheim for discussions, and to D.I. for managing NUCAPT.

Keywords

Atom-probe tomography
Coarsening
Fe-Cu alloy
Interfacial segregation
Phase separation

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

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10.1016/j.actamat.2007.12.044

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@article{c4a52a8e63594f5e85e234ef89424ff4,

title = "The temporal evolution of the decomposition of a concentrated multicomponent Fe-Cu-based steel",

abstract = "The nucleation (to a limited extent), growth and coarsening behavior of Cu-rich precipitates in a concentrated multicomponent Fe-Cu-based steel aged at 500 °C from 0.25 to 1024 h is investigated. The temporal evolution of the precipitates, heterophase interfaces, matrix compositions and precipitate morphologies are presented. With increasing time, Cu partitions to the precipitates, Ni, Al and Mn partition to the interfacial region, whereas Fe and Si partition to the matrix. Coarsening time exponents are determined for the mean radius, 〈R(t)〉, number density, NV(t), and supersaturations, which are compared to the Lifshitz-Slyzov-Wagner (LSW) model for coarsening, modified for concentrated multicomponent alloys by Umantsev and Olson (UO). The experimental results indicate that the alloy does not strictly follow UO model behavior. Additionally, we delineate the formation of a Ni-Al-Mn shell with a stoichiometric ratio of 0.51:0.41:0.08 at 1024 h, which reduces the interfacial free energy between the precipitates and the matrix.",

keywords = "Atom-probe tomography, Coarsening, Fe-Cu alloy, Interfacial segregation, Phase separation",

author = "{Prakash Kolli}, R. and Seidman, {David N.}",

note = "Funding Information: This research is supported by the Office of Naval Research (N00014-03-1-0252), Dr. Julie Christodoulou grant officer. Atom-probe tomographic analyses were performed at the Northwestern University Center for Atom-probe Tomography (NUCAPT), and the LEAP{\texttrademark} tomograph was purchased with funding from the NSF-MRI (DMR-0420532, Dr. Charles Bouldin, monitor) and ONR-DURIP (N00014-0400798, Dr. Julie Christodoulou, monitor) programs. Additionally, the LEAP{\texttrademark} tomograph was enhanced in late April 2006 with a picosecond laser with funding from ONR-DURIP (N0014-06-1-0539, Dr. Julie Christodoulou, monitor). This work made use of Central Facilities supported by the MRSEC Program of the National Science Foundation (DMR-0520513) at the Materials Research Center of Northwestern University. The TEM work was performed in the EPIC facility of NUANCE Center at Northwestern University. NUANCE Center is supported by NSF-NSEC, NSF-MRSEC, Keck Foundation, the State of Illinois, and Northwestern University. We extend our gratitude to Professor Emeritus Morris E. Fine, Research Professor Semyon Vaynman, and Research Assistant Professor Dieter Isheim for discussions, and to D.I. for managing NUCAPT. ",

year = "2008",

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doi = "10.1016/j.actamat.2007.12.044",

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volume = "56",

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T1 - The temporal evolution of the decomposition of a concentrated multicomponent Fe-Cu-based steel

AU - Prakash Kolli, R.

AU - Seidman, David N.

N1 - Funding Information: This research is supported by the Office of Naval Research (N00014-03-1-0252), Dr. Julie Christodoulou grant officer. Atom-probe tomographic analyses were performed at the Northwestern University Center for Atom-probe Tomography (NUCAPT), and the LEAP™ tomograph was purchased with funding from the NSF-MRI (DMR-0420532, Dr. Charles Bouldin, monitor) and ONR-DURIP (N00014-0400798, Dr. Julie Christodoulou, monitor) programs. Additionally, the LEAP™ tomograph was enhanced in late April 2006 with a picosecond laser with funding from ONR-DURIP (N0014-06-1-0539, Dr. Julie Christodoulou, monitor). This work made use of Central Facilities supported by the MRSEC Program of the National Science Foundation (DMR-0520513) at the Materials Research Center of Northwestern University. The TEM work was performed in the EPIC facility of NUANCE Center at Northwestern University. NUANCE Center is supported by NSF-NSEC, NSF-MRSEC, Keck Foundation, the State of Illinois, and Northwestern University. We extend our gratitude to Professor Emeritus Morris E. Fine, Research Professor Semyon Vaynman, and Research Assistant Professor Dieter Isheim for discussions, and to D.I. for managing NUCAPT.

PY - 2008/5

Y1 - 2008/5

N2 - The nucleation (to a limited extent), growth and coarsening behavior of Cu-rich precipitates in a concentrated multicomponent Fe-Cu-based steel aged at 500 °C from 0.25 to 1024 h is investigated. The temporal evolution of the precipitates, heterophase interfaces, matrix compositions and precipitate morphologies are presented. With increasing time, Cu partitions to the precipitates, Ni, Al and Mn partition to the interfacial region, whereas Fe and Si partition to the matrix. Coarsening time exponents are determined for the mean radius, 〈R(t)〉, number density, NV(t), and supersaturations, which are compared to the Lifshitz-Slyzov-Wagner (LSW) model for coarsening, modified for concentrated multicomponent alloys by Umantsev and Olson (UO). The experimental results indicate that the alloy does not strictly follow UO model behavior. Additionally, we delineate the formation of a Ni-Al-Mn shell with a stoichiometric ratio of 0.51:0.41:0.08 at 1024 h, which reduces the interfacial free energy between the precipitates and the matrix.

AB - The nucleation (to a limited extent), growth and coarsening behavior of Cu-rich precipitates in a concentrated multicomponent Fe-Cu-based steel aged at 500 °C from 0.25 to 1024 h is investigated. The temporal evolution of the precipitates, heterophase interfaces, matrix compositions and precipitate morphologies are presented. With increasing time, Cu partitions to the precipitates, Ni, Al and Mn partition to the interfacial region, whereas Fe and Si partition to the matrix. Coarsening time exponents are determined for the mean radius, 〈R(t)〉, number density, NV(t), and supersaturations, which are compared to the Lifshitz-Slyzov-Wagner (LSW) model for coarsening, modified for concentrated multicomponent alloys by Umantsev and Olson (UO). The experimental results indicate that the alloy does not strictly follow UO model behavior. Additionally, we delineate the formation of a Ni-Al-Mn shell with a stoichiometric ratio of 0.51:0.41:0.08 at 1024 h, which reduces the interfacial free energy between the precipitates and the matrix.

KW - Atom-probe tomography

KW - Coarsening

KW - Fe-Cu alloy

KW - Interfacial segregation

KW - Phase separation

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JO - Acta Materialia

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The temporal evolution of the decomposition of a concentrated multicomponent Fe-Cu-based steel

Abstract

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Keywords

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