Small fatigue crack growth in aluminium alloy EN-AW 6082/T6

0346321 - ÚFM 2011 RIV GB eng J - Článek v odborném periodiku
Jíša, D. - Liškutín, P. - Kruml, Tomáš - Polák, Jaroslav
Small fatigue crack growth in aluminium alloy EN-AW 6082/T6.
International Journal of Fatigue. Roč. 32, č. 12 (2010), s. 1913-1920. ISSN 0142-1123. E-ISSN 1879-3452
Grant CEP: GA ČR GA101/07/1500
Výzkumný záměr: CEZ:AV0Z20410507
Klíčová slova: Aluminium alloys * small cracks * grack growth rate
Kód oboru RIV: JL - Únava materiálu a lomová mechanika
Impakt faktor: 1.799, rok: 2010

The kinetics of small fatigue crack growth at room temperature was measured using light microscopy observation of the cracks in a shallow notch of a cylindrical specimen. Symmetrical tension–compression cycling was adopted. The growth of the crack was measured within the range of half surface crack length from 10 μm up to 2 mm. A linear dependence between the crack growth rate and the crack length, observed in case of steels, was confirmed to be valid in the aluminium 6082/T6 alloy, too. The crack growth coefficient kg increases with plastic strain amplitude; this dependence is well described by a power law. The fatigue life prediction based on the crack growth measurements is compared with the Manson-Coffin law.
Trvalý link: http://hdl.handle.net/11104/0187385