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

Schlitzer, Teresa ; Bauerbach, Kai ; Beier, Heinz Thomas ; Fischaleck, Manuel ; Langschwager, Kay ; Oechsner, Matthias ; Rudolph, Jürgen ; Scholz, Alfred ; Vormwald, Michael ; 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 ; Bauerbach, Kai ; Beier, Heinz Thomas ; Fischaleck, Manuel ; Langschwager, Kay ; Oechsner, Matthias ; Rudolph, Jürgen ; Scholz, Alfred ; Vormwald, Michael ; 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
Issue 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
URL / URN: 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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