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INVESTIGATIONS TO IMPROVE THE TRANSFERABILITY OF SPECIMEN RESULTS BY REAL COMPONENT

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Author(s): Wen Tan | Michael Stoschka | Hermann Maderbacher | Martin Riedler | Wilfried Eichlseder | Fernando Romagnoli

Journal: Materials Engineering
ISSN 1335-0803

Volume: 17;
Issue: 3;
Start page: 1;
Date: 2010;
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Keywords: Fracture mechanics | Life prediction | Titanium alloys | Fatigue analysis | Variable amplitude test

ABSTRACT
For the improvement of the lifetime calculation of components made of the titanium alloy Ti-6-4, a closed loop methodology from specimen to the component is presented. Based on forged pre-material specimens fatigue tests are done as a basic research, which are presented as S/N-curves. With the determined material data a lifetime calculation with the program FEMFAT is done on a typically fitting element. Finally the results of the lifetime calculation are compared to real component tests, which are done to evaluate the results of the lifetime calculation. The component tests are performed with constant and variable load. Therewith the transferability of specimen results to real components is shown. Additional fracture analysis by light microscope and scanning electron microscope is carried out to give further information of the influence factor of the lifetime and a further description between fracture behaviour of specimen and components.
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