The Effect of Non-Equilibrium Solidification on the Structure and Mechanical Properties of AZ91 Alloy

• Autorzy: Dziadoń A. , Bucki T. , Porzucek P.

Identyfikatory

DOI

10.24425/123613

• Języki publikacji: EN

Abstrakty

EN

AZ91 alloy was cast in a steel mould pre-exposed to three different temperatures: -196 ºC, 20 ºC and 650 ºC. The aim of the study was to determine the difference in the microstructure and mechanical properties between the castings formed in a cold mould and those solidifying under near-equilibrium conditions in a mould pre-heated to 650 ºC. Solidification at a low temperature led to dispersion of the structure elements as well as supersaturation of the solid solution of aluminium in magnesium. The heat treatment results indicate that the alloy solidified in the mould pre-exposed to 20 ºC can be successfully aged (heat treated to the T5 temper). It was found that the effect of the ageing process (T5 temper) was greater than the effect of the microstructure fragmentation, which was due to rapid solidification. The ageing results were assessed by comparing the microstructure and mechanical properties of AZ91 brought to the T5 condition with those obtained for the material in the T6 condition.

Słowa kluczowe

EN

AZ91 alloy; microstructure; mechanical properties; heat treatment

PL

Stop AZ91; mikrostruktura; właściwości mechaniczne; obróbka cieplna

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2018
• Tom: Vol. 18, iss. 3
• Strony: 120--125
• Opis fizyczny: Bibliogr. 11 poz., rys., tab., wykr.

Twórcy

autor

Dziadoń A.

• Kielce University of Technology, Kielce, Poland

autor

Bucki T.

• Kielce University of Technology, Kielce, Poland

autor

Porzucek P.

• Kielce University of Technology, Kielce, Poland

Bibliografia

• [1] Akhtar, A. & Teghtsoonian, E. (1969). Solid solution strengthening of magnesium single crystals – alloying behavior in basal slip. Acta Metallurgica. 17, 1339-1349.
• [2] Akhtar, A. & Teghtsoonian, E. (1968). Solid solution hardening in magnesium alloys. Transactions of the Japan Institute of Metals. 9, 692-697.
• [3] Cáceres, C.H. & Rovera, D.M. (2001). Solid solution strengthening in concentrated MgAl alloys. Journal of Light Metals.1(3), 151-156.
• [4] Dahle, A.K., Lee, Y.C., Nave, M.D., Schaffer, P.L. & St. John, D.H. (2001). Development of the as-cast microstructure in magnesium-aluminium alloys. Journal of Light Metals.1(1), 61-72.
• [5] Predel, B. (1998). Landolt-Börnstein - Group IV Physical Chemistry (Numerical Data and Functional Relationships in Science and Technology). Berlin: Springer-Verlag.
• [6] Braszczyńska-Malik, K.N. (2011). Precipitates of γ-Mg17Al12 Phse in AZ91 Alloy. In Frank Czerwinski (Eds.) Magnesium Alloys – Design, Processing and Properties. 95-112. INTECH.
• [7] Blum, W., Li, Y.J., Zeng, X.H., Zhang, P., Großmann, B. & Haberling, C. (2005). Creep deformation mechanisms in high-pressure die-cast magnesium-aluminium base alloys. Metallurgical and Materials Transactions A. 36(7), 1721-1728.
• [8] Regev, M., Aghion, E. & Rosen, A. (1997). Creep studies of AZ91D pressure die casting. Materials Science and Engineering: A. 234-236, 123-126.
• [9] Avedesian, M.M., Baker, H. (1999). ASM Specialty Handbook: Magnesium and magnesium alloys. USA: ASM International.
• [10] Braszczyńska-Malik, K.N. (2009). Discontinuous and continuous precipitation in magnesium-aluminium type alloys. Journal of Alloys and Compounds. 477(1-2), 870-876.
• [11] Mola, R., Bucki, T. & Dziadoń, A. (2016). Formation of Al-alloyed layer on magnesium with use of casting techniques. Archives of Foundry Engineering. 16(1), 112-116.

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).