Microstructure of AE44 magnesium alloy before and after hot-chamber die casting

• Autorzy: Kiełbus A.
• Konferencja: 12th International Scientific Conference CAM3S'2006, 27-30th November 2006, Gliwice-Zakopane
• Języki publikacji: EN

Abstrakty

EN

Purpose: AE44 magnesium alloy allows attractive high temperature mechanical properties, as well as diecastability and good corrosion resistance. It contains magnesium, aluminium, cerium and lanthanum. Typically, it is used in automotive industry for structural components working at elevated temperature (150-175 degrees centigrade). The aim of this paper is to present the results of investigations on the microstructure of the AE44 magnesium alloy before and after hot chamber die casting. Design/methodology/approach: Die casting was carried out on 280 tone locking force hot-chamber die casting machine. For the microstructure observation, a Olympus GX+70 metallographic microscope and a HITACHI S-3400N scanning electron microscope with a Thermo Noran EDS spectrometer equipped with SYSTEM SIX were used. Findings: Based on the investigation carried out it was found that the AE44 magnesium alloy before die casting is characterized by alpha-Mg solid solution with globular, lamellar and acicular precipitations of Al11RE3 and Al3RE phases. Moreover, there was found globular Mn-rich phase existence (probably Al8CeMn4 phase). After hot-chamber die casting the microstructure of AE44 alloys consist of equiaxed dendrites of alpha-Mg with precipitates of Al11RE3 and probably Al2RE phase. Research limitations/implications: Future researches should contain investigations of the influence of the hot chamber die casting process parameters on the microstructure and mechanical properties of AE44 magnesium alloy. Practical implications: AE44 magnesium alloy can be cast with cold- and hot-chamber die casting machine. Results of investigation may be useful for preparing die casting technology of this alloy. Originality/value: The results of the researches make up a basis for the investigations of new magnesium alloys containing rare earth elements for hot chamber die casting designed to service in elevated temperature.

Słowa kluczowe

EN

metallic alloys; alloy manufacturing; casting; magnesium alloy; AE44 magnesium alloy; mechanical properties

PL

stopy metaliczne; wytwarzanie stopu; odlewanie; stop magnezu; stop magnezu AE44; właściwości mechaniczne

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2007
• Tom: Vol. 20, nr 1-2
• Strony: 459--462
• Opis fizyczny: Bibliogr. 15 poz., fot., rys., tab.

Twórcy

autor

Kiełbus A.

• Department of Materials Science, Silesian University of Technology, ul. Krasińskiego 8, 40-019 Katowice, Poland,

Bibliografia

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