Abstract
Diffusion dominates the creep deformation at low stress range for high chromium steel P91. Brittle creep fracture is caused by cavity nucleation, growth and coalescence of cavities and large precipitates (Laves phase and M23C6) at grain boundary under low stress range. At low stress range, a linear relation between strain at failure and different stresses has been described. Moreover, the minimum strain rate is also proportional to the different stresses.
The new set of constitutive equations model should describe the microstructure evolutions of M23C6 carbides and Laves phase, the linear relationships between strain rate and stress, strain at failure and stress. The both influence of stress and microstructural changes is regarded as the new failure criterion. Three aspects of novelty for the new set of constitutive equations model have been considered in this paper. The further work should focus on the form and validation of the new set of constitutive equations model.
The new set of constitutive equations model should describe the microstructure evolutions of M23C6 carbides and Laves phase, the linear relationships between strain rate and stress, strain at failure and stress. The both influence of stress and microstructural changes is regarded as the new failure criterion. Three aspects of novelty for the new set of constitutive equations model have been considered in this paper. The further work should focus on the form and validation of the new set of constitutive equations model.
| Original language | English |
|---|---|
| Title of host publication | 6th International “HIDA” Conference |
| Subtitle of host publication | Life/Defect Assessment & Failures in High Temperature Plant |
| Editors | A. Shibli |
| Publisher | ETD Ltd, UK |
| Publication status | Published - 2013 |
| Event | 6th International High-temperature Defect Assessment (HIDA) Conference: Life/Defect Assessment & Failures in High Temperature Plant - Crown Plaza ANA Hotel, Glover Hill, Nagasaki, Japan Duration: 2 Dec 2013 → 4 Dec 2013 Conference number: 6 http://www.etd-consulting.com/forthcoming-events-2/2013/12/2/6th-international-hida-conference https://static1.squarespace.com/static/5304e62de4b00674c06afd5c/t/55101750e4b0f7f604b1e2bb/1427117904133/Contents.pdf |
Conference
| Conference | 6th International High-temperature Defect Assessment (HIDA) Conference |
|---|---|
| Abbreviated title | HIDA-6 |
| Country/Territory | Japan |
| City | Nagasaki |
| Period | 2/12/13 → 4/12/13 |
| Internet address |