PREDICTION OF HIGH TEMPERATURE TENSILE AND CREEP PROPERTIES FROM HOT HARDNESS TESTS OF A-Zr-Nb-Sn ALLOY

摘要

A method is described by which long-time creep properties can be predicted by using hot hardness data on a Larson Miller, time-temperature parameter. The elevated-temperature tensile strengths and stress to cause 1% deformation in creep tests were plotted against the parameter P = T (C + log t) with values of the constant, C, 18 and 19 for tensile and creep data, respectively. A similar plot of hardness was made against the parameter, P, with a value of 20 being used for C. A cross plot of log hardness versus log tensile strength (and creep stress for 1% deformation) was made for equal values of the Larson-Miller parameter;it yielded a straight line.