The significance of the tertiary creep criterion in setting time-dependent allowable stresses

Robert Swindeman; Weiju Ren; Michael J. Swindeman

doi:10.1115/PVP201545981

The significance of the tertiary creep criterion in setting time-dependent allowable stresses

Robert Swindeman, Weiju Ren, Michael J. Swindeman

Advanced Nuclear Materials

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

The database for Alloy 800H was reviewed with respect to the initiation of tertiary creep and subsequent rupture. Data covered temperatures in the range of 600 to 1000°C and times to 100,000 hours. The establishment of the time to initiate tertiary creep presented a problem because of the non-classical behavior of creep often exhibited in the creep curves. Stress values based on the current tertiary creep and rupture criteria were compared for several heats of material considering both classical and non-classical creep data. Fits to tertiary creep showed more scatter and it was found that 80% of the minimum stress for tertiary creep was generally lower than 67% of the minimum stress to rupture. Using only data from classical curves did produce stress values higher than those from the rupture criterion.

Original language	English
Title of host publication	Materials and Fabrication
Publisher	American Society of Mechanical Engineers (ASME)
ISBN (Electronic)	9780791857007, 9780791857007, 9780791857007, 9780791857007
DOIs	https://doi.org/10.1115/PVP201545981
State	Published - 2015
Event	ASME 2015 Pressure Vessels and Piping Conference, PVP 2015 - Boston, United States Duration: Jul 19 2015 → Jul 23 2015

Publication series

Name	American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume	6B-2015
ISSN (Print)	0277-027X

Conference

Conference	ASME 2015 Pressure Vessels and Piping Conference, PVP 2015
Country/Territory	United States
City	Boston
Period	07/19/15 → 07/23/15

Access to Document

10.1115/PVP201545981

Cite this

Swindeman, R., Ren, W., & Swindeman, M. J. (2015). The significance of the tertiary creep criterion in setting time-dependent allowable stresses. In Materials and Fabrication (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; Vol. 6B-2015). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/PVP201545981

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title = "The significance of the tertiary creep criterion in setting time-dependent allowable stresses",

abstract = "The database for Alloy 800H was reviewed with respect to the initiation of tertiary creep and subsequent rupture. Data covered temperatures in the range of 600 to 1000°C and times to 100,000 hours. The establishment of the time to initiate tertiary creep presented a problem because of the non-classical behavior of creep often exhibited in the creep curves. Stress values based on the current tertiary creep and rupture criteria were compared for several heats of material considering both classical and non-classical creep data. Fits to tertiary creep showed more scatter and it was found that 80% of the minimum stress for tertiary creep was generally lower than 67% of the minimum stress to rupture. Using only data from classical curves did produce stress values higher than those from the rupture criterion.",

author = "Robert Swindeman and Weiju Ren and Swindeman, {Michael J.}",

note = "Publisher Copyright: Copyright {\textcopyright} 2015 by ASME.; ASME 2015 Pressure Vessels and Piping Conference, PVP 2015 ; Conference date: 19-07-2015 Through 23-07-2015",

year = "2015",

doi = "10.1115/PVP201545981",

language = "English",

series = "American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP",

publisher = "American Society of Mechanical Engineers (ASME)",

booktitle = "Materials and Fabrication",

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Swindeman, R, Ren, W & Swindeman, MJ 2015, The significance of the tertiary creep criterion in setting time-dependent allowable stresses. in Materials and Fabrication. American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP, vol. 6B-2015, American Society of Mechanical Engineers (ASME), ASME 2015 Pressure Vessels and Piping Conference, PVP 2015, Boston, United States, 07/19/15. https://doi.org/10.1115/PVP201545981

The significance of the tertiary creep criterion in setting time-dependent allowable stresses. / Swindeman, Robert; Ren, Weiju; Swindeman, Michael J.
Materials and Fabrication. American Society of Mechanical Engineers (ASME), 2015. (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; Vol. 6B-2015).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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N2 - The database for Alloy 800H was reviewed with respect to the initiation of tertiary creep and subsequent rupture. Data covered temperatures in the range of 600 to 1000°C and times to 100,000 hours. The establishment of the time to initiate tertiary creep presented a problem because of the non-classical behavior of creep often exhibited in the creep curves. Stress values based on the current tertiary creep and rupture criteria were compared for several heats of material considering both classical and non-classical creep data. Fits to tertiary creep showed more scatter and it was found that 80% of the minimum stress for tertiary creep was generally lower than 67% of the minimum stress to rupture. Using only data from classical curves did produce stress values higher than those from the rupture criterion.

AB - The database for Alloy 800H was reviewed with respect to the initiation of tertiary creep and subsequent rupture. Data covered temperatures in the range of 600 to 1000°C and times to 100,000 hours. The establishment of the time to initiate tertiary creep presented a problem because of the non-classical behavior of creep often exhibited in the creep curves. Stress values based on the current tertiary creep and rupture criteria were compared for several heats of material considering both classical and non-classical creep data. Fits to tertiary creep showed more scatter and it was found that 80% of the minimum stress for tertiary creep was generally lower than 67% of the minimum stress to rupture. Using only data from classical curves did produce stress values higher than those from the rupture criterion.

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PB - American Society of Mechanical Engineers (ASME)

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Y2 - 19 July 2015 through 23 July 2015

ER -

The significance of the tertiary creep criterion in setting time-dependent allowable stresses

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