Properties of bulk nanostructured Al-based alloy at cyclic loading

0349907 - ÚFM 2011 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Chlupová, Alice - Chlup, Zdeněk
Properties of bulk nanostructured Al-based alloy at cyclic loading.
NANOCON 2010. 2nd International Conference. Ostrava: Tanger, 2011, s. 1-6. ISBN 978-80-87294-19-2.
[NANOCON 2010. International Conference /2./. Olomouc (CZ), 12.10.2010-14.10.2010]
Výzkumný záměr: CEZ:AV0Z20410507
Klíčová slova: Nanostructured materials * Mechanical properties * Fatigue
Kód oboru RIV: JG - Hutnictví, kovové materiály

Al-based alloy having a nominal chemical composition of Al93Fe3Cr2Ti2 (at.%) is highly promising structural material due to advantageous weight-strength ratio and in comparison with commercially used Al alloys also good thermal stability because of presence of reinforcing icosahedral quaiscrystals in the structure. In the present work the mechanical properties and especially fatigue behaviour of this type of nanoquazicrystalline material obtained in bulk form are described. For cyclic loading the cylindrical specimens were machined from two types of extrudates with different powder particle size (PPS). Fatigue properties were studied using servohydraulic MTS machine and cyclic loading was performed at constant stress amplitude with positive mean stress. Measured stress-strain data were evaluated and fatigue life in form of S-N curves was obtained. Fracture surface of broken testpieces was observed, fractographic analysis was performed and fracture mechanism was evaluated.
Trvalý link: http://hdl.handle.net/11104/0190033