Abstract
Residual stresses have been introduced into a notched compact tension specimen of a 347 weld material by mechanical compression. The required level of compressive load has previously been determined from finite-element studies. The residual stress in the vicinity of the notch root has been measured using neutron diffraction and the results compared with those obtained from finite-element analysis. The effect of stress redistribution due to creep has been examined and it is found that a significant reduction in stress is measured after 1000 h at 650° C. The implications of these results with regard to the development of damage in the specimen due to creep relaxation are examined.
Original language | English |
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Pages (from-to) | 414031-414037 |
Number of pages | 7 |
Journal | Journal of Pressure Vessel Technology, Transactions of the ASME |
Volume | 130 |
Issue number | 4 |
DOIs | |
Publication status | Published - Nov 2008 |
Keywords
- Creep crack initiation
- Fracture
- High temperature
- Residual stress