The influence of casting defects on fatigue resistance of elektron 21 magnesium alloy

• Autorzy: Pikos I. , Kiełbus A. , Adamiec J.
• Języki publikacji: EN

Abstrakty

EN

The Mg-RE alloys are attractive, constructional materials, especially for aircraft and automotive industry, thanks to combination of low density, good mechanical properties, also at elevated temperature, and good castability and machinability. Present paper contains results of fatigue resistance test carried out on Elektron 21 magnesium alloy, followed by microstructural and fractographical investigation of material after test. The as-cast material has been heat treated according to two different procedures. The fatigue resistance test has been conducted with 10⁶ cycles of uniaxial, sine wave form stress between 9 MPa and 90 MPa. Fractures of specimens, which ruptured during the test, have been investigated with scanning electron microscope. The microstructure of specimens has been investigated with light microscopy. Detrimental effect of casting defects, as inclusions and porosity, on fatigue resistance has been proved. Also the influence of heat treatment's parameters has been described.

Słowa kluczowe

EN

casting defect; mechanical properties; microstructure; magnesium alloy; Elektron 21 alloy

PL

wada odlewu; właściwości mechaniczne; mikrostruktura; stop magnezu; stop Elektron 21

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2013
• Tom: Vol. 13, iss. 2
• Strony: 103--106
• Opis fizyczny: Bibliogr. 7 poz., rys., tab., wykr.

Twórcy

autor

Pikos I.

• Faculty of Materials Engineering and Metallurgy, Silesian University of Technology, Krasińskiego 8, 40-019 Katowice, Poland

autor

Kiełbus A.

• Faculty of Materials Engineering and Metallurgy, Silesian University of Technology, Krasińskiego 8, 40-019 Katowice, Poland

autor

Adamiec J.

• Faculty of Materials Engineering and Metallurgy, Silesian University of Technology, Krasińskiego 8, 40-019 Katowice, Poland

Bibliografia

• [1] Piątkowski, J. & Binczyk, F. (2002). Properties and uses of the foundry magnesium alloys (in Polish). Archives of Foundry Engineering. 2(4), 426-433.
• [2] Nie, J. F., Gao, X. & Zhu, S.M. (2005). Enhanced age hardening response and creep resistance of Mg–Gd alloys containing Zn. Scripta Materialia. 53, 1049-1053. DOI: 10.1016/j.scriptamat.2005.07.004.
• [3] Kiełbus, A. (2008). The influence of long-term annealing on the microstructure of Elektron 21 magnesium alloy. Inżynieria Materiałowa. 4, 310-315.
• [4] Kiełbus, A. (2006). Casting magnesium alloy Elektron 21 - structure and properties. Archives of Foundry. 6(18), 173-178.
• [5] Bonderek, Z. & Rzadkosz, S. (2000). The phenomena of porosity in castings made of aluminium and magnesium alloys. Solidification of Metals and Alloys. 2(43), 51-55.
• [6] Kuffova, M. (2011). Fatigue Endurance of Magnesium Alloys, Magnesium Alloys - Design, Processing and Properties, Frank Czerwinski (Ed.), ISBN: 978-953-307-520-4, InTech, Available from: http://www.intechopen.com /books/magnesium-alloys-design-processing-and-properties/fatigue -endurance-of-magnesium-alloys.
• [7] He, S.M., Zeng, X.Q., Peng L.M., Gao X., Nie, J.F. & Ding W.J. (2006). Precipitation in a Mg–10Gd–3Y–0.4Zr (wt.%) alloy during isothermal ageing at 250◦C. Journal of Alloys and Compounds. 421, 309-313. DOI: 10.1016/j.jallcom. 2005.11.046.