Cyclic plastic response and fatigue life in superduplex 2507 stainless steel

2010 ◽  
Vol 32 (2) ◽  
pp. 279-287 ◽  
Author(s):  
Jaroslav Polák ◽  
Martin Petrenec ◽  
Tomáš Kruml
Keyword(s):  
Stainless Steel ◽  
Fatigue Life ◽  
Plastic Response ◽  
Cyclic Plastic

scholarly journals Cyclic plastic response and fatigue life in symmetric and asymmetric cyclic loading

2011 ◽  
Vol 10 ◽  
pp. 568-577 ◽  
Author(s):  
J. Polák ◽  
M. Petrenec ◽  
T. Kruml ◽  
A. Chlupová
Keyword(s):  
Fatigue Life ◽  
Cyclic Loading ◽  
Plastic Response ◽  
Cyclic Plastic

Cyclic Plastic Response and Fatigue Life of Materials

2007 ◽  
Vol 348-349 ◽  
pp. 113-116 ◽  
Author(s):  
Jaroslav Polák
Keyword(s):  
Fatigue Life ◽  
Plastic Strain ◽  
Crack Growth ◽  
Strain Amplitude ◽  
Decisive Role ◽  
Cyclic Stress ◽  
Plastic Strain Amplitude ◽  
Short Crack ◽  
Plastic Response ◽  
Cyclic Plastic

Recently the decisive role of plastic strain amplitude for the initiation and the growth rate of short cracks has been demonstrated. The plastic strain amplitude can be related to the rate of short crack growth and also to the fatigue life. Since the cyclic stress-strain response of a material determines the plastic strain amplitude it influences basically its fatigue life. The experiments in stress and plastic strain controlled loading and short crack growth are presented and used to demonstrate the importance of the cyclic plastic response for the evaluation of the fatigue life.

An Investigation of Cyclic Transient Behavior and Implications on Fatigue Life Estimates

1997 ◽  
Vol 119 (2) ◽  
pp. 161-170 ◽  
Author(s):  
Yanyao Jiang ◽  
Peter Kurath
Keyword(s):  
Stainless Steel ◽  
Fatigue Life ◽  
Cyclic Hardening ◽  
Transient Behavior ◽  
Fatigue Tests ◽  
304 Stainless Steel ◽  
Deformation History ◽  
Life Estimation ◽  
Fatigue Life Estimation ◽  
Track Deformation

Current research focuses on proportional cyclic hardening and non-Massing behaviors. The interaction of these two hardenings can result in the traditionally observed overall softening, hardening or mixed behavior exhibited for fully reversed strain controlled fatigue tests. Proportional experiments were conducted with five materials, 304 stainless steel, normalized 1070 and 1045 steels, and 7075-T6 and 6061-T6 aluminum alloys. All the materials display similar trends, but the 304 stainless steel shows the most pronounced transient behavior and will be discussed in detail. Existing algorithms for this behavior are evaluated in light of the recent experiments, and refinements to the Armstrong-Frederick class of incremental plasticity models are proposed. Modifications implemented are more extensive than the traditional variation of yield stress, and a traditional strain based memory surface is utilized to track deformation history. Implications of the deformation characteristics with regard to fatigue life estimation, especially variable amplitude loading, will be examined. The high-low step loading is utilized to illustrate the effect of transient deformation on fatigue life estimation procedures, and their relationship to the observed and modeled deformation.

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