Development of thermal fatigue damage in 1CrMoV rotor steel

Experimental study of type 316 stainless steel failure under LCF/TMF loading conditions

“…The mean stress is important to consider especially when the tests are conducted under different phase conditions. The evidence of mean stress has been discussed by many other investigators [7][8][9][10][11] and its effect is taken into account in the SmithWatson-Topper [12] and Ostergren [13] parameters which are presented in Eqs. (1) and (2) respectively.…”

Analysis of Inelastic Behavior for High Temperature Materials and Structures

“…Hysteresis loops obtained from structural analysis of results of real components provide an input to generate service-type thermo-mechanical fatigue (TMF) loading profiles for laboratory testing of materials. For example, strain and temperature variations on the surface of real components were used for TMF testing of uni-axial specimens in (Cui et al 2009;Holdsworth et al 2007). A two-bar system subjected to thermal cycling will be presented in Sect.…”

“…12.14 corresponds to the hot start situation. Further examples include cold and warm start profiles with higher differences in the maximum and minimum absolute temperatures within the cycles (Holdsworth et al 2007). …”

“…In Holdsworth et al (2007) results of uni-axial TMF tests for 1CrMoV forged steel under service-type loading conditions are discussed. Specimens were subjected to three heat profiles with the same maximum temperature but different temperatures at the beginning and the end of the cycles.…”

“…12.3.2 for a two-bar system are typical for many components subjected to variable thermal environment. Examples include turbine rotors (Naumenko et al 2011b;Kostenko et al 2013;Holdsworth et al 2007;Colombo et al 2008), turbocharger casings (Laengler et al 2010;Nagode et al 2011;Längler et al 2014) and many other structures.…”