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
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
UR - http://www.scopus.com/inward/record.url?scp=80053644192&partnerID=8YFLogxK
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U2 - 10.1016/j.msea.2011.08.011
DO - 10.1016/j.msea.2011.08.011
M3 - Article
AN - SCOPUS:80053644192
VL - 528
SP - 8451
EP - 8459
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
IS - 29-30
ER -