Direct observations of sigma phase growth and dissolution in 2205 duplex stainless steel

Todd Palmer, J. W. Elmer, S. S. Babu, E. D. Specht

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The formation and growth of sigma (σ) phase in a 2205 duplex stainless steel is monitored during an 850°C isothermal heat treatment using an in situ synchrotron x-ray diffraction technique. At this temperature, σ phase is first observed within approximately 40 seconds of the start of the isothermal heat treatment and grows rapidly over the course of the 3600 second heat treatment to a volume fraction of approximately 13%. A simultaneous increase in the austenite (γ) volume fraction and a decrease in the ferrite (δ) volume fraction are observed. The σ phase formed at this temperature is rapidly dissolved within approximately 200 seconds when the temperature is increased to 1000°C. Accompanying this rapid dissolution of the σ phase, the δ and γ volume fractions both approach the balanced (50/50) level observed in the as-received material.

Original languageEnglish (US)
Title of host publicationTrends in Welding Research - Proceedings of the 7th International Conference
Pages945-950
Number of pages6
Volume2005
StatePublished - 2005
Event7th International Conference on Trends in Welding Research - Pine Mountain, GA, United States
Duration: May 16 2005May 20 2005

Other

Other7th International Conference on Trends in Welding Research
CountryUnited States
CityPine Mountain, GA
Period5/16/055/20/05

Fingerprint

Stainless Steel
Volume fraction
Dissolution
Stainless steel
Heat treatment
Synchrotrons
Austenite
Temperature
Ferrite
Diffraction
X rays

All Science Journal Classification (ASJC) codes

  • Metals and Alloys

Cite this

Palmer, T., Elmer, J. W., Babu, S. S., & Specht, E. D. (2005). Direct observations of sigma phase growth and dissolution in 2205 duplex stainless steel. In Trends in Welding Research - Proceedings of the 7th International Conference (Vol. 2005, pp. 945-950)
Palmer, Todd ; Elmer, J. W. ; Babu, S. S. ; Specht, E. D. / Direct observations of sigma phase growth and dissolution in 2205 duplex stainless steel. Trends in Welding Research - Proceedings of the 7th International Conference. Vol. 2005 2005. pp. 945-950
@inproceedings{91f8565bc0f24fc4b42986ac57a423f6,
title = "Direct observations of sigma phase growth and dissolution in 2205 duplex stainless steel",
abstract = "The formation and growth of sigma (σ) phase in a 2205 duplex stainless steel is monitored during an 850°C isothermal heat treatment using an in situ synchrotron x-ray diffraction technique. At this temperature, σ phase is first observed within approximately 40 seconds of the start of the isothermal heat treatment and grows rapidly over the course of the 3600 second heat treatment to a volume fraction of approximately 13{\%}. A simultaneous increase in the austenite (γ) volume fraction and a decrease in the ferrite (δ) volume fraction are observed. The σ phase formed at this temperature is rapidly dissolved within approximately 200 seconds when the temperature is increased to 1000°C. Accompanying this rapid dissolution of the σ phase, the δ and γ volume fractions both approach the balanced (50/50) level observed in the as-received material.",
author = "Todd Palmer and Elmer, {J. W.} and Babu, {S. S.} and Specht, {E. D.}",
year = "2005",
language = "English (US)",
isbn = "0871708426",
volume = "2005",
pages = "945--950",
booktitle = "Trends in Welding Research - Proceedings of the 7th International Conference",

}

Palmer, T, Elmer, JW, Babu, SS & Specht, ED 2005, Direct observations of sigma phase growth and dissolution in 2205 duplex stainless steel. in Trends in Welding Research - Proceedings of the 7th International Conference. vol. 2005, pp. 945-950, 7th International Conference on Trends in Welding Research, Pine Mountain, GA, United States, 5/16/05.

Direct observations of sigma phase growth and dissolution in 2205 duplex stainless steel. / Palmer, Todd; Elmer, J. W.; Babu, S. S.; Specht, E. D.

Trends in Welding Research - Proceedings of the 7th International Conference. Vol. 2005 2005. p. 945-950.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - Direct observations of sigma phase growth and dissolution in 2205 duplex stainless steel

AU - Palmer, Todd

AU - Elmer, J. W.

AU - Babu, S. S.

AU - Specht, E. D.

PY - 2005

Y1 - 2005

N2 - The formation and growth of sigma (σ) phase in a 2205 duplex stainless steel is monitored during an 850°C isothermal heat treatment using an in situ synchrotron x-ray diffraction technique. At this temperature, σ phase is first observed within approximately 40 seconds of the start of the isothermal heat treatment and grows rapidly over the course of the 3600 second heat treatment to a volume fraction of approximately 13%. A simultaneous increase in the austenite (γ) volume fraction and a decrease in the ferrite (δ) volume fraction are observed. The σ phase formed at this temperature is rapidly dissolved within approximately 200 seconds when the temperature is increased to 1000°C. Accompanying this rapid dissolution of the σ phase, the δ and γ volume fractions both approach the balanced (50/50) level observed in the as-received material.

AB - The formation and growth of sigma (σ) phase in a 2205 duplex stainless steel is monitored during an 850°C isothermal heat treatment using an in situ synchrotron x-ray diffraction technique. At this temperature, σ phase is first observed within approximately 40 seconds of the start of the isothermal heat treatment and grows rapidly over the course of the 3600 second heat treatment to a volume fraction of approximately 13%. A simultaneous increase in the austenite (γ) volume fraction and a decrease in the ferrite (δ) volume fraction are observed. The σ phase formed at this temperature is rapidly dissolved within approximately 200 seconds when the temperature is increased to 1000°C. Accompanying this rapid dissolution of the σ phase, the δ and γ volume fractions both approach the balanced (50/50) level observed in the as-received material.

UR - http://www.scopus.com/inward/record.url?scp=33751539051&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33751539051&partnerID=8YFLogxK

M3 - Conference contribution

SN - 0871708426

SN - 9780871708427

VL - 2005

SP - 945

EP - 950

BT - Trends in Welding Research - Proceedings of the 7th International Conference

ER -

Palmer T, Elmer JW, Babu SS, Specht ED. Direct observations of sigma phase growth and dissolution in 2205 duplex stainless steel. In Trends in Welding Research - Proceedings of the 7th International Conference. Vol. 2005. 2005. p. 945-950