TY - GEN
T1 - Law of crack growth life for P92 steel under the conditions of creep-fatigue multiplication and projection of the threshold temperature of creep crack growth based on this law
AU - Yokobori, A. T.
AU - Sugiura, R.
AU - Kimoto, S.
AU - Yoshino, D.
AU - Matsuzaki, T.
PY - 2010/6/7
Y1 - 2010/6/7
N2 - W-added 9Cr ferritic heat-resistant steels, ASME grade P92, are used under the high temperature creep-fatigue condition. Concerning the maintenance of the operational safety and minimizing operational costs, it is necessary to construct a law of predicting the crack growth life by clarifying the dominant factors of the crack growth life under the condition of creep-fatigue multiplication (the effect of stress holding time on the time-dependent fracture). In this study, crack growth tests under the conditions of creep-fatigue multiplication were conducted with various conditions of stress holding time, applied stress and temperatures. As a result, a unified law of predicting the crack growth life under the conditions of creep-fatigue multiplication was derived based on the concept of Q* with the transition function of crack growth life from fatigue to creep.
AB - W-added 9Cr ferritic heat-resistant steels, ASME grade P92, are used under the high temperature creep-fatigue condition. Concerning the maintenance of the operational safety and minimizing operational costs, it is necessary to construct a law of predicting the crack growth life by clarifying the dominant factors of the crack growth life under the condition of creep-fatigue multiplication (the effect of stress holding time on the time-dependent fracture). In this study, crack growth tests under the conditions of creep-fatigue multiplication were conducted with various conditions of stress holding time, applied stress and temperatures. As a result, a unified law of predicting the crack growth life under the conditions of creep-fatigue multiplication was derived based on the concept of Q* with the transition function of crack growth life from fatigue to creep.
UR - http://www.scopus.com/inward/record.url?scp=77952978869&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77952978869&partnerID=8YFLogxK
U2 - 10.1115/PVP2009-77989
DO - 10.1115/PVP2009-77989
M3 - Conference contribution
AN - SCOPUS:77952978869
SN - 9780791843697
T3 - American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
SP - 1451
EP - 1460
BT - Proceedings of the ASME Pressure Vessels and Piping Conference 2009 - Materials and Fabrication
T2 - 2009 ASME Pressure Vessels and Piping Conference
Y2 - 26 July 2009 through 30 July 2009
ER -