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Experimental characterization and numerical assessment of fatigue crack growth under thermo-mechanical conditions

Schlitzer, Teresa and Bauerbach, Kai and Beier, Heinz Thomas and Fischaleck, Manuel and Langschwager, Kay and Oechsner, Matthias and Rudolph, Jürgen and Scholz, Alfred and Vormwald, Michael and Willuweit, Adrian (2015):
Experimental characterization and numerical assessment of fatigue crack growth under thermo-mechanical conditions.
In: Materialwissenschaft und Werkstofftechnik, 46 (2), pp. 165-177. ISSN 0933-5137,
[Article]

Abstract

The fatigue behavior of the austenitic stainless steel X6CrNiNb18-10 (1.4550, AISI 347) is investigated. Experimental data are generated at room temperature, at elevated temperatures and further under thermo-mechanical conditions. Research is focused on generating data for parameter identification, especially for the improvement of material models. The influence of temperature on the stress-strain behavior and the fatigue life is presented. Finite element simulations are used to describe fatigue crack growth under thermo-cyclic loading conditions. Using the example of a thick-walled tube, the essential parameter for the crack growth rate, the effective cyclic J-integral, is determined for eight temperature transients (defined by fluid temperature, heat transfer coefficient and inner pressure). An approximation of the effective cyclic J-integral allows modeling without consideration of the crack geometry in the model.

Item Type: Article
Erschienen: 2015
Creators: Schlitzer, Teresa and Bauerbach, Kai and Beier, Heinz Thomas and Fischaleck, Manuel and Langschwager, Kay and Oechsner, Matthias and Rudolph, Jürgen and Scholz, Alfred and Vormwald, Michael and Willuweit, Adrian
Title: Experimental characterization and numerical assessment of fatigue crack growth under thermo-mechanical conditions
Language: English
Abstract:

The fatigue behavior of the austenitic stainless steel X6CrNiNb18-10 (1.4550, AISI 347) is investigated. Experimental data are generated at room temperature, at elevated temperatures and further under thermo-mechanical conditions. Research is focused on generating data for parameter identification, especially for the improvement of material models. The influence of temperature on the stress-strain behavior and the fatigue life is presented. Finite element simulations are used to describe fatigue crack growth under thermo-cyclic loading conditions. Using the example of a thick-walled tube, the essential parameter for the crack growth rate, the effective cyclic J-integral, is determined for eight temperature transients (defined by fluid temperature, heat transfer coefficient and inner pressure). An approximation of the effective cyclic J-integral allows modeling without consideration of the crack geometry in the model.

Journal or Publication Title: Materialwissenschaft und Werkstofftechnik
Journal volume: 46
Number: 2
Uncontrolled Keywords: Thermo-mechanical fatigue, biaxial behavior, effective cyclic J-integral, AISI 347, fatigue crack growth
Divisions: 13 Department of Civil and Environmental Engineering Sciences > Institute of Steel Constructions and Material Mechanics > Fachgebiet Werkstoffmechanik
13 Department of Civil and Environmental Engineering Sciences > Institute of Steel Constructions and Material Mechanics
13 Department of Civil and Environmental Engineering Sciences
Date Deposited: 16 Mar 2015 16:29
Official URL: http://onlinelibrary.wiley.com/doi/10.1002/mawe.201400372/pd...
Alternative keywords:
Alternative keywordsLanguage
Thermomechanische Ermüdung, biaxiales Verhalten, effektives zyklisches J-Integral, X6CrNiNb18-10, ErmüdungsrisswachstumGerman
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