Steady state creep behavior of zirconia dispersion strengthened platinum alloys in medium stress regime

Nobuaki Sekido; Akinori Hoshino; Masahiro Fukuzaki; Yoko Yamabe-Mitarai; Tomohiro Maruko

doi:10.1016/j.msea.2011.08.011

Steady state creep behavior of zirconia dispersion strengthened platinum alloys in medium stress regime

Nobuaki Sekido, Akinori Hoshino, Masahiro Fukuzaki, Yoko Yamabe-Mitarai, Tomohiro Maruko

ENG - Materials Science

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

10 Citations (Scopus)

Abstract

Microstructure and creep behavior of a commercial ZrO₂ dispersion-strengthened Pt alloy were investigated. Emphasis was placed on examining the correlation between the minimum creep rates and the applied stress in the temperature range of 1273-1773K. The ODS Pt alloy exhibited a highly elongated grain structure that had developed by a thermo-mechanical processing. The interfaces between ZrO₂ particles and the Pt matrix were found to be incoherent. An attractive interaction appeared to be present between dislocations and ZrO₂ particles. The detachment controlled dislocation creep model was used to explain the steady state creep behavior. The presence of ZrO₂ inclusions was also beneficial for maintaining the grain structure and the subgrains, which then provides increased resistance to high temperature creep deformation.

Original language	English
Pages (from-to)	8451-8459
Number of pages	9
Journal	Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
Volume	528
Issue number	29-30
DOIs	https://doi.org/10.1016/j.msea.2011.08.011
Publication status	Published - 2011 Nov 15

Keywords

Creep
Dislocations
Dispersion strengthened alloys
Electron microscopy
Non-ferrous alloys

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10.1016/j.msea.2011.08.011

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title = "Steady state creep behavior of zirconia dispersion strengthened platinum alloys in medium stress regime",

abstract = "Microstructure and creep behavior of a commercial ZrO2 dispersion-strengthened Pt alloy were investigated. Emphasis was placed on examining the correlation between the minimum creep rates and the applied stress in the temperature range of 1273-1773K. The ODS Pt alloy exhibited a highly elongated grain structure that had developed by a thermo-mechanical processing. The interfaces between ZrO2 particles and the Pt matrix were found to be incoherent. An attractive interaction appeared to be present between dislocations and ZrO2 particles. The detachment controlled dislocation creep model was used to explain the steady state creep behavior. The presence of ZrO2 inclusions was also beneficial for maintaining the grain structure and the subgrains, which then provides increased resistance to high temperature creep deformation.",

keywords = "Creep, Dislocations, Dispersion strengthened alloys, Electron microscopy, Non-ferrous alloys",

author = "Nobuaki Sekido and Akinori Hoshino and Masahiro Fukuzaki and Yoko Yamabe-Mitarai and Tomohiro Maruko",

note = "Funding Information: The database for SAMBA is funded by the Society for Acute Medicine. CA is funded by a National Institute for Health Research (NIHR) Academic Clinical Lectureship. This study is supported by the NIHR Applied Research Collaboration (ARC) West Midlands through salary support to DSL. The views expressed are those of the authors and not necessarily those of the NIHR or the Department of Health and Social Care.",

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doi = "10.1016/j.msea.2011.08.011",

language = "English",

volume = "528",

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Steady state creep behavior of zirconia dispersion strengthened platinum alloys in medium stress regime. / Sekido, Nobuaki; Hoshino, Akinori; Fukuzaki, Masahiro et al.
In: Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, Vol. 528, No. 29-30, 15.11.2011, p. 8451-8459.

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

TY - JOUR

T1 - Steady state creep behavior of zirconia dispersion strengthened platinum alloys in medium stress regime

AU - Sekido, Nobuaki

AU - Hoshino, Akinori

AU - Fukuzaki, Masahiro

AU - Yamabe-Mitarai, Yoko

AU - Maruko, Tomohiro

N1 - Funding Information: The database for SAMBA is funded by the Society for Acute Medicine. CA is funded by a National Institute for Health Research (NIHR) Academic Clinical Lectureship. This study is supported by the NIHR Applied Research Collaboration (ARC) West Midlands through salary support to DSL. The views expressed are those of the authors and not necessarily those of the NIHR or the Department of Health and Social Care.

PY - 2011/11/15

Y1 - 2011/11/15

N2 - Microstructure and creep behavior of a commercial ZrO2 dispersion-strengthened Pt alloy were investigated. Emphasis was placed on examining the correlation between the minimum creep rates and the applied stress in the temperature range of 1273-1773K. The ODS Pt alloy exhibited a highly elongated grain structure that had developed by a thermo-mechanical processing. The interfaces between ZrO2 particles and the Pt matrix were found to be incoherent. An attractive interaction appeared to be present between dislocations and ZrO2 particles. The detachment controlled dislocation creep model was used to explain the steady state creep behavior. The presence of ZrO2 inclusions was also beneficial for maintaining the grain structure and the subgrains, which then provides increased resistance to high temperature creep deformation.

AB - Microstructure and creep behavior of a commercial ZrO2 dispersion-strengthened Pt alloy were investigated. Emphasis was placed on examining the correlation between the minimum creep rates and the applied stress in the temperature range of 1273-1773K. The ODS Pt alloy exhibited a highly elongated grain structure that had developed by a thermo-mechanical processing. The interfaces between ZrO2 particles and the Pt matrix were found to be incoherent. An attractive interaction appeared to be present between dislocations and ZrO2 particles. The detachment controlled dislocation creep model was used to explain the steady state creep behavior. The presence of ZrO2 inclusions was also beneficial for maintaining the grain structure and the subgrains, which then provides increased resistance to high temperature creep deformation.

KW - Creep

KW - Dislocations

KW - Dispersion strengthened alloys

KW - Electron microscopy

KW - Non-ferrous alloys

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Steady state creep behavior of zirconia dispersion strengthened platinum alloys in medium stress regime

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