Results of a low cycle fatigue inter-laboratory comparison on 1CrMoNiV rotor steel at elevated temperature

摘要

Following an initial intercomparison investigation carried out under a VAMAS programme, a similarventure has been carried out on a single source of 1Cr rotor steel at 525°C at a single total strainrange of 0.5% and reversed strain rate of 6%/min (10~3/s). A key difference was that, for eachspecimen prior to testing at high temperature, bending measurements were performed at roomtemperature as a check on unixial alignment since this parameter had previously been suggested as asource of scatter in endurance. Fifteen laboratories participated in the comparison and 67 test resultshave been subjected to statistical analysis. There appeared to be no consistent effect of the magnitudeof bending strain but it is concluded that a minimum of five repeat tests are required from eachestablishment for meaningful analyses to be made.