Cyclic Plasticity and Cyclic Creep in Austenitic-Ferritic Duplex Steel

Abstract:

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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.

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Periodical:

Edited by:

Pavel Šandera

Pages:

431-434

DOI:

10.4028/www.scientific.net/KEM.465.431

Citation:

J. Polák et al., "Cyclic Plasticity and Cyclic Creep in Austenitic-Ferritic Duplex Steel", Key Engineering Materials, Vol. 465, pp. 431-434, 2011

Online since:

January 2011

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Price:

$35.00

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