Formation of delta ferrite in 9 Wt Pct Cr steel investigated by in-situ x-ray diffraction using synchrotron radiation

P. Mayr; T. A. Palmer; J. W. Elmer; E. D. Specht; S. M. Allen

doi:10.1007/s11661-010-0371-7

Formation of delta ferrite in 9 Wt Pct Cr steel investigated by in-situ x-ray diffraction using synchrotron radiation

P. Mayr, T. A. Palmer, J. W. Elmer, E. D. Specht, S. M. Allen

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

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Abstract

A study was conducted to demonstrate the monitoring of the formation and dissolution of δ-ferrite in a 9 wt pct chromium steel using in-situ X-ray diffraction (XRD) with synchrotron radiation during exposure to a single-weld thermal cycle. A 100-kg ingot of an experimental Fe-0.168C-0.23Si-0.22Mn-8.85Cr- 1.54Mo-0.18Ni-0.29V-0.057Nb-0.009B-0.016N steel was produced by conventional sand casting. It was normalized at temperature of 1373 K for 8 hours and then allowed to air cool at room temperature and tempered again for an additional 24 hours at the same temperature after air cooling at room temperature tempered at 1003 K for 10 hours. A tempered martensite microstructure without any delta ferrite was observed and finely dispersed precipitates were identified by analytical transmission electron microscopy as Cr-rich M₂₃C ₆ carbides, V-rich MX nitrides, and Nb-rich MX carbides.

Original language	English (US)
Pages (from-to)	2462-2465
Number of pages	4
Journal	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume	41
Issue number	10
DOIs	https://doi.org/10.1007/s11661-010-0371-7
State	Published - Oct 2010

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys

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title = "Formation of delta ferrite in 9 Wt Pct Cr steel investigated by in-situ x-ray diffraction using synchrotron radiation",

abstract = "A study was conducted to demonstrate the monitoring of the formation and dissolution of δ-ferrite in a 9 wt pct chromium steel using in-situ X-ray diffraction (XRD) with synchrotron radiation during exposure to a single-weld thermal cycle. A 100-kg ingot of an experimental Fe-0.168C-0.23Si-0.22Mn-8.85Cr- 1.54Mo-0.18Ni-0.29V-0.057Nb-0.009B-0.016N steel was produced by conventional sand casting. It was normalized at temperature of 1373 K for 8 hours and then allowed to air cool at room temperature and tempered again for an additional 24 hours at the same temperature after air cooling at room temperature tempered at 1003 K for 10 hours. A tempered martensite microstructure without any delta ferrite was observed and finely dispersed precipitates were identified by analytical transmission electron microscopy as Cr-rich M23C 6 carbides, V-rich MX nitrides, and Nb-rich MX carbides.",

author = "P. Mayr and Palmer, {T. A.} and Elmer, {J. W.} and Specht, {E. D.} and Allen, {S. M.}",

note = "Funding Information: The support of PM through the Max Kade Foundation (New York) and the Austrian Academy of Sciences is gratefully acknowledged. This research was sponsored by the Division of Materials Sciences and Engineering, Office of Basic Energy Sciences, United States Department of Energy (EDS). Use of the Advanced Photon Source at Argonne National Laboratory was supported by the United States Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.",

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doi = "10.1007/s11661-010-0371-7",

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Formation of delta ferrite in 9 Wt Pct Cr steel investigated by in-situ x-ray diffraction using synchrotron radiation. / Mayr, P.; Palmer, T. A.; Elmer, J. W.; Specht, E. D.; Allen, S. M.

In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 41, No. 10, 10.2010, p. 2462-2465.

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

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AU - Specht, E. D.

AU - Allen, S. M.

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N2 - A study was conducted to demonstrate the monitoring of the formation and dissolution of δ-ferrite in a 9 wt pct chromium steel using in-situ X-ray diffraction (XRD) with synchrotron radiation during exposure to a single-weld thermal cycle. A 100-kg ingot of an experimental Fe-0.168C-0.23Si-0.22Mn-8.85Cr- 1.54Mo-0.18Ni-0.29V-0.057Nb-0.009B-0.016N steel was produced by conventional sand casting. It was normalized at temperature of 1373 K for 8 hours and then allowed to air cool at room temperature and tempered again for an additional 24 hours at the same temperature after air cooling at room temperature tempered at 1003 K for 10 hours. A tempered martensite microstructure without any delta ferrite was observed and finely dispersed precipitates were identified by analytical transmission electron microscopy as Cr-rich M23C 6 carbides, V-rich MX nitrides, and Nb-rich MX carbides.

AB - A study was conducted to demonstrate the monitoring of the formation and dissolution of δ-ferrite in a 9 wt pct chromium steel using in-situ X-ray diffraction (XRD) with synchrotron radiation during exposure to a single-weld thermal cycle. A 100-kg ingot of an experimental Fe-0.168C-0.23Si-0.22Mn-8.85Cr- 1.54Mo-0.18Ni-0.29V-0.057Nb-0.009B-0.016N steel was produced by conventional sand casting. It was normalized at temperature of 1373 K for 8 hours and then allowed to air cool at room temperature and tempered again for an additional 24 hours at the same temperature after air cooling at room temperature tempered at 1003 K for 10 hours. A tempered martensite microstructure without any delta ferrite was observed and finely dispersed precipitates were identified by analytical transmission electron microscopy as Cr-rich M23C 6 carbides, V-rich MX nitrides, and Nb-rich MX carbides.

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ER -

Formation of delta ferrite in 9 Wt Pct Cr steel investigated by in-situ x-ray diffraction using synchrotron radiation

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