The influence of wall thickness on the microstructure of HPDC AE44 alloy

• Autorzy: Rzychoń T. , Kiełbus A.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The main objective of this study was determination of influence of wall thickness on the microstructure of die-cast magnesium alloy containing aluminum and rare earth elements. Design/methodology/approach: The study was conducted on die-cast magnesium alloy containing 4% wt. aluminum and 4% wt. mixture of rare earth elements (mischmetal) in the die-cast condition. The mischmetal includes cerium, lanthanum, neodymium and praseodymium. The microstructure was characterized by optical microscopy (Olympus GX-70) and a scanning electron microscopy (Hitachi S3400) equipped with an X-radiation detector EDS (VOYAGER of NORAN INSTRUMENTS). The phase identification of these alloys was identified by X-ray diffraction (JDX-75). Quantitative examination was conducted using the "MET-ILO" automatic image analysis programme. Findings: The decreasing of wall thickness of die-cast AE44 leads to grain size decrease and emergence new intermetallic phases in microstructure of this alloy. With increasing thickness higher porosity was observed in alloy. Research limitations/implications: Future researches should contain investigations of the influence of diecast parameters on microstructure and porosity. Practical implications: AE44 magnesium alloy is used in automotive industry. Moreover, this alloy has a new potential application and results of investigations may be useful for preparing optimal technology of die casting and designing parts of car engine. Originality/value: The results of the researches make up a basis for the next investigations of magnesium alloys with addition of aluminum and rare earth elements designed to exploitation at temperature to 200 °C.

Słowa kluczowe

EN

metallic alloys; magnesium alloys; microstructure; die-casting

PL

stopy metaliczne; stopy magnezu; mikrostruktura; odlewanie ciśnieniowe

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2007
• Tom: Vol. 28, nr 8
• Strony: 471--474
• Opis fizyczny: Bibliogr. 15 poz., il., wykr.

Twórcy

autor

Rzychoń T.

autor

Kiełbus A.

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

Bibliografia

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