TY - JOUR
T1 - Analysis of 316H creep crack initiation data at 550 °C using a crack tip constraint parameter
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:
© 2021 Elsevier Ltd
PY - 2021/5/1
Y1 - 2021/5/1
N2 - In this paper, 316H creep crack growth data at 550 °C are analysed to investigate the effect of in-plane constraint on creep crack initiation times. A constraint parameter is proposed to quantify the difference between an actual opening stress and the Riedel-Rice opening stress field in plane strain, using experimentally measured C*. Test data analysis shows that creep crack initiation times can be well characterized by the C* integral with the proposed parameter. A modified form of a model due to Nikbin, Smith and Webster is suggested, and scatter in predictions is shown to be reduced from ~40 to ~5.
AB - In this paper, 316H creep crack growth data at 550 °C are analysed to investigate the effect of in-plane constraint on creep crack initiation times. A constraint parameter is proposed to quantify the difference between an actual opening stress and the Riedel-Rice opening stress field in plane strain, using experimentally measured C*. Test data analysis shows that creep crack initiation times can be well characterized by the C* integral with the proposed parameter. A modified form of a model due to Nikbin, Smith and Webster is suggested, and scatter in predictions is shown to be reduced from ~40 to ~5.
KW - 316H creep crack growth data at 550 °C
KW - Creep crack initiation time
KW - Creep crack tip constraint parameter
UR - http://www.scopus.com/inward/record.url?scp=85105691653&partnerID=8YFLogxK
U2 - 10.1016/j.engfracmech.2021.107746
DO - 10.1016/j.engfracmech.2021.107746
M3 - Article
AN - SCOPUS:85105691653
SN - 0013-7944
VL - 248
JO - Engineering Fracture Mechanics
JF - Engineering Fracture Mechanics
M1 - 107746
ER -