Abstract
The minimum creep rate and the Monkman-Grant relationship are currently essential methods for predicting creep life. The accuracy of traditional power law minimum creep rate equation is unsatisfactory when applied to a wide range of stresses and temperatures. In this study, four sets of Grade 91 minimum creep rate experimental data on different stress and temperatures were applied for power law, hyperbolic sine (HS) law and a modified hyperbolic sine (MHS) law minimum creep rate equation. Additionally, attempts have been made to introduce the effects of temperature into the modified hyperbolic sine law equation. The result shows that the modified hyperbolic sine law equation exhibits higher accuracy to a wide range of stress and temperature level and shows a good agreement with life prediction. The extrapolation curve from high stress to low stress matches the trend of experimental data. It is more suitable for extrapolation to long-term service facilities such as power plants with a design life of up to 60 years.
| Original language | English |
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| Title of host publication | Proceedings of 10th International Conference on Advances in Machinery, Material Science and Engineering Application (MMSE 2024) |
| Publisher | IOS Press |
| Publication status | Accepted/In press - 22 Jul 2024 |
| Event | 10th International Conference on Advances in Machinery, Material Science and Engineering Application - Paris, France Duration: 27 Jul 2024 → 28 Jul 2024 Conference number: 10 |
Publication series
| Name | Advances in Transdisciplinary Engineering |
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| Publisher | IOS Press BV |
| ISSN (Print) | 2352-751X |
| ISSN (Electronic) | 2352-7528 |
Conference
| Conference | 10th International Conference on Advances in Machinery, Material Science and Engineering Application |
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| Abbreviated title | MMSE 2024 |
| Country/Territory | France |
| City | Paris |
| Period | 27/07/24 → 28/07/24 |