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CYCLIC STRESS‐STRAIN RESPONSE OF 2 1/4Cr‐1 Mo STEEL AT ELEVATED TEMPERATURES
Author(s) -
Polák J.,
Klesnil M.,
Helešic J.
Publication year - 1986
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/j.1460-2695.1986.tb00445.x
Subject(s) - materials science , cyclic stress , hardening (computing) , hysteresis , composite material , softening , stress (linguistics) , low cycle fatigue , atmospheric temperature range , internal stress , strain hardening exponent , strain (injury) , metallurgy , thermodynamics , condensed matter physics , medicine , linguistics , philosophy , physics , layer (electronics)
The temperature dependence of the cyclic stress‐strain response of 2 1/4 Cr‐1 Mo steel has been studied in the temperature range 20–550°C. Fatigue hardening‐softening curves and cyclic stress‐strain curves were obtained. A more detailed analysis was based on the statistical theory of the hysteresis loop and the concept of internal and effective stresses. A stress‐dip procedure allowed the separation of the contribution of internal and effective stresses both in dependence on temperature and during fatigue life in high temperature cyclic straining. The high effective stress contributes to the fatigue resistance of the steel. In high temperature fatigue both the internal and the effective stress decrease with cyclic straining.