Abstract
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.
Original language | English |
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Article number | 107746 |
Journal | Engineering Fracture Mechanics |
Volume | 248 |
DOIs | |
Publication status | Published - 2021 May 1 |
Bibliographical note
Publisher Copyright:© 2021 Elsevier Ltd
Keywords
- 316H creep crack growth data at 550 °C
- Creep crack initiation time
- Creep crack tip constraint parameter
ASJC Scopus subject areas
- General Materials Science
- Mechanics of Materials
- Mechanical Engineering