Cyclic Plasticity and Cyclic Creep in Austenitic-Ferritic Duplex Steel

Jaroslav Polák; Martin Petrenec; Jiří Man; Tomáš Kruml

doi:10.4028/www.scientific.net/KEM.465.431

Paper Titles

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Experimental Study on the Relation between Elastic and Thermal Deformation of the AZ31 Magnesium Alloy and Composite
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Structural Changes, Evolution of Damage Parameters and Crack Propagation Behaviour in Welded Plastic Pipes
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Cyclic Plasticity and Cyclic Creep in Austenitic-Ferritic Duplex Steel
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Cyclic Deformation Behavior of Austenitic Steels in the Temperature Range -60°C ≤T ≤550°C
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Creep of Fe–Al Alloys with Additions of Niobium and Carbon
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Effect of Temperature on the Cyclic Stress Components of Gamma - TiAl Based Alloy with Niobium Alloying
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 465Cyclic Plasticity and Cyclic Creep in...

Cyclic Plasticity and Cyclic Creep in Austenitic-Ferritic Duplex Steel

Abstract:

Smooth specimens made from austenitic-ferritic duplex steel were subjected to constant stress amplitude loading with positive mean stresses. Hysteresis loops were recorded during the fatigue life and plastic strain amplitude and cyclic creep rate were determined. Fatigue hardening/softening curves, cyclic creep curves and cyclic stress-strain curves for different positive mean stresses were evaluated. Typical dislocation structures developed in both phases of the duplex steel were identified using TEM, compared with the saturated plastic strain amplitude and correlated with the decrease of the cyclic creep rate during cycling and the slope of the cyclic stress-strain curve.