Microstructural Characterization of the As-cast AZ91 Magnesium Alloy with Rare Earth Elements

• Autorzy: Grzybowska A. , Braszczyńska-Malik K.
• Języki publikacji: EN

Abstrakty

EN

Microstructural analysis of as-cast Mg-9Al-0.9Zn-xRE (x = 0, 1, 2, 3, 5 wt.%) magnesium alloys is presented. Light microscopy (LM) and scanning electron microscopy (SEM+EDX) were used to characterized the obtained material. The results revealed that the as-cast AZ91 alloy consists of α – Mg matrix, binary eutectic α + γ (where γ is Mg17Al12). While rare earth elements were introduced to the Mg-Al-Zn alloy new Al11RE3 phase was formed. Additionally, in the experimental alloys instead of Al-Mn phase, ternary Al-Mn-RE compound was observed. What is more, the influence of RE addition on the area fraction of eutectic and needle-like phase was analysed. With increasing addition of RE, the amount of γ phase decreased, but the amount of Al11RE3 phase increased.

Słowa kluczowe

EN

Mg-Al-Zn alloy; rare earth elements; microstructure

PL

stop Mg-AI-Zn; pierwiastki ziem rzadkich; mikrostruktura

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2012
• Tom: Vol. 12, iss. 2s
• Strony: 23--26
• Opis fizyczny: Bibliogr. 14 poz., rys., tab., wykr.

Twórcy

autor

Grzybowska A.

• Institute of Materials Engineering, Częstochowa University of Technology, Częstochowa, Poland

autor

Braszczyńska-Malik K.

• Institute of Materials Engineering, Częstochowa University of Technology, Częstochowa, Poland

Bibliografia

• [1] Friedrich H., Schumann S.: Research for a “new age of magnesium” in the automotive industry, Journal of Materials Processing Technology, 2001, Vol. 117, 276÷281.
• [2] Watarai H.: Trend of research and development for magnesium alloys – reducing the weight of structural materials in motor vehicles, Science & Technology Trends – Quarterly Review, 2006, Vol. 18, 84÷97.
• [3] Kulekci M.K.: Magnesium and its alloys applications in automotive industry, International Journal of Advanced Manufacturing Technology, 2008, Vol. 39, 851÷865.
• [4] Dahle A.K., Lee Y.C., Nave M.D., Schaffer P.L., StJohn D.H.: Development of the as-cast microstructure in magnesium-aluminium alloys, Journal of Light Metals, 2001, Vol. 1, 61÷72.
• [5] Celotto S.: TEM study of continuous precipitation in Mg-9 wt.% Al-1 wt.% Zn alloy, Acta Materialia, 2000, Vol. 48, 1775÷1787.
• [6] Guoying Z., Hui Z., Ming G., Dan W.: Mechanism of effects of rare earths on microstructure and properties at elevated temperatures of AZ91 magnesium alloy, Journal of Rare Earths, 2007, Vol. 25, 348÷351.
• [7] Zhang J., Yu P., Fang D., Tang D., Meng J.: Effect of substituting cerium-rich mischmetal with lanthanum on microstructure and mechanical properties of die-cast Mg-Al-RE alloys, Materials and Design, 2009, Vol. 30, 2372÷2378.
• [8] Lu Y., Wang Q., Zeng X., Ding W., Zhai C., Zhu Y.: Effects of rare earths on the microstructure, properties and fracture behavior of Mg-Al alloys, Materials Science and Engineering A, 2000, Vol. 278, 66÷76.
• [9] Zhang J., Wang J., Qiu X., Zhang D., Tian Z., Niu X., Tang D., Meng J.: Effect of Nd on the microstructure, mechanical properties and corrosion behavior of die-cast Mg-4Al-based alloy, Journal of Alloys and Compounds, 2008, Vol. 464, 556÷564.
• [10] Hongmei L., Yungui C., Yongbai T., Deming H., Gao N.: Microstructure and properties of Mg-10%Al (0 ~ 3%) Di alloys, Journal of Rare Earths, 2006, Vol. 24, 382÷384.
• [11] Rzychoń T., Kiełbus A.: Microstructure and tensile properties of sand cast and die cast AE44 magnesium alloy, Archives of Metallurgy and Materials, 2008, Vol. 53, 901÷907.
• [12] Zhang J., Liu S., Leng Z., Zhang M., Meng J., Wu R.: Microstructures and mechanical properties of heat-resistant HPDC Mg-4Al-based alloys containing cheap misch metal, Materials Science and Engineering A, 2011, Vol. 528, 2670÷2677.
• [13] Braszczyńska-Malik K.N., Żydek A.: Microstructure of Mg-Al alloy with rare earth addition, Archives of Foundry Engineering, 2008, Vol. 10, 23÷26.
• [14] Żydek A., Kamieniak J., Braszczyńska-Malik K.N.: Evolution of Mg-5Al-0.4Mn microstructure after rare earth elements addition, Archives of Foundry Engineering, 2010, Vol. 11, 157÷160.