TY - GEN
T1 - Correlation analysis between time-dependent creep crack-tip stress and constraint effect on creep crack initiation time
AU - Lee, Seung Ho
AU - Jung, Hyun Woo
AU - Kim, Yun Jae
AU - Nikbin, Kamran
AU - Ainsworth, Robert A.
N1 - Funding Information:
This work was supported by National Research Foundation of Korea(NRF) funded by the Ministry of Science and ICT. (NRF-2017R1A2B2009759)
Publisher Copyright:
© 2020 ASME
PY - 2020
Y1 - 2020
N2 - In this study, to qualify the constraint effect on creep crack initiation, the correlation analysis between proposed constraint parameter Q' using time-dependent creep crack-tip stress and creep crack initiation time variable Ai was performed. Ai implies the influence of constraint effect on creep crack initiation. The procedure to calculate the Ai and the Q'-parameter was presented. To evaluate various status of constraint effect, creep crack growth tests for twenty-one compact tension specimens of Type 316H stainless steel at 550oC were investigated. The results of correlation analysis explain the reason for the different initiation time at the same C* level in respect of constraint effect.
AB - In this study, to qualify the constraint effect on creep crack initiation, the correlation analysis between proposed constraint parameter Q' using time-dependent creep crack-tip stress and creep crack initiation time variable Ai was performed. Ai implies the influence of constraint effect on creep crack initiation. The procedure to calculate the Ai and the Q'-parameter was presented. To evaluate various status of constraint effect, creep crack growth tests for twenty-one compact tension specimens of Type 316H stainless steel at 550oC were investigated. The results of correlation analysis explain the reason for the different initiation time at the same C* level in respect of constraint effect.
KW - Constraint effect
KW - Creep crack initiation
KW - Creep crack initiation time variable
KW - Time-dependent creep crack-tip stress
UR - http://www.scopus.com/inward/record.url?scp=85095973429&partnerID=8YFLogxK
U2 - 10.1115/PVP2020-21645
DO - 10.1115/PVP2020-21645
M3 - Conference contribution
AN - SCOPUS:85095973429
T3 - American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
BT - Materials and Fabrication
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 2020 Pressure Vessels and Piping Conference, PVP 2020
Y2 - 3 August 2020
ER -