Some of the important experimentally measured parameters are further
calculated and compared in Table 3 between the MTP and SSFS specimens,
including Young’s modulus (E ), initial cyclic yield stress
(),
cyclic strain hardening exponent (n ’), together with the cyclic
strength coefficient (K ’) calculated according to the
Ramberg-Osgood relationship61. The identified
parameters obtained by the MTP-3 specimen can provide excellent
agreement with these from SSFS specimen at 600 °C for FV566. Thus, it is
concluded that the scaling factors determined from UVP FE method can be
used with confidence to correctly covert the measured MTP cyclic
deformation data to the same equivalent deformation as SSFS shows in
this work. The measured cyclic strain-stress data from MTP LCF test at
high temperature can be reliably adopt to evaluate some of the essential
parameters required by UVP model1,3.
Table 3: Comparison of the material parameters based on Ramberg-Osgood
relation derived from the SSFS LCF test and the MTP LCF tests for FV566
at 600 ℃.