The possibility of using longitudinal uniaxial specimens to assess the residual creep life of superheater tubing has been examined by comparing the results of rupture tests on such specimens with bursting tests on the same tube. Reasonable agreement was obtained for moderate amounts of creep damage, but not when the damage became severe. These results suggest that longitudinal tests would be unable to differentiate between degrees of creep damage varying from a remaining life fraction of 0.1 to 0.5, and that predictions of remaining creep life based upon them could be misleading.
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References
1.
HARTR. V.: Met. Technol., 1976,3, 1.
2.
ROBINSONE. L.: Trans. ASME, 1938, 60,777.
3.
WOODFORDD. A.: Paper presented at the internat. conf. on ‘Creep and fatigue’, Sheffield,1–5 April 1974, Institution of Mechanical Engineers.
4.
CHITTYA., and DUVALD.: Paper presented at the joint internat. conf. on ‘Creep’, London,1963, Institution of Mechanical Engin-eers.
5.
Project 2021 Report, 1976, Electrical Research Association.
6.
CARRUTHERSR. B. and DAYR. V.: Report No. SSD/NE/R138; Central Electricity Generating Board.
