Simple modelling of the constitutive behaviour of a 1%CrMoV rotor steel in service-like thermo-mechanical fatigue tests

Colombo, F.; Masserey, Bernard; Mazza, Edoardo; Holdsworth, S.R.

doi:10.1179/mht.2002.026

Cited by 12 publications

(1 citation statement)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…using t R (σ( N ), T ). D cr2 is determined using the appropriate rupture time curve but compensating for stress reduction due to softening by entering the time‐to‐rupture line with an amplified stress value: t R (σ( N )/Z( N ), T ), where Z ( N ) is the current cyclic creep‐softening factor determined from the evolution of hold time relaxation behaviour, and ranges from 1 to 0.77 11 …”

Section: Local Endurance Analysismentioning

confidence: 99%

Factors influencing the service‐like thermomechanical fatigue test cycle endurance of 1% CrMoV rotor steel

Masserey

Colombo

Mazza

et al. 2003

Fatigue Fract Eng Mat Struct

Self Cite

View full text Add to dashboard Cite

Service‐like thermomechanical fatigue tests have been performed in order to characterize the endurance of 1% CrMoV rotor steel under such transient thermal conditions. The key features of these tests are low strain rates (≤10−5 s−1) and longer hold periods. In all testpieces, ratcheting with progressive section reduction is observed in the central portion of the gauge length accompanied by local amplification of the strain range. The finite‐element‐based analysis of this phenomenon allows the measured endurances to be rationalized with those determined from isothermal tests. Post‐test inspection has revealed the development of two concurrent damaging mechanisms in the testpieces: (i) fatigue at the surface and (ii) creep in the interior. Different methods of damage calculation for creep–fatigue interaction are applied and compared in their predictive capabilities.

show abstract