Usable Properties of AlSi7Mg Alloy after Sodium or Strontium Modification

• Autorzy: Tupaj M. , Orłowicz A. W. , Mróz M. , Trytek M. , Markowska O.

Identyfikatory

DOI

10.1515/afe-2016-0064

• Języki publikacji: EN

Abstrakty

EN

The paper deals with the effect of microstructure diversified by means of variable cooling rate on service properties of AlSi7Mg cast alloy refined traditionally with Dursalit EG 281, grain refining with titanium-boron and modified with sodium and a variant of the same alloy barbotage-refined with argon and simultaneously grain refining with titanium-boron and modified with strontium. For both alloy variants, the castings were subject to T6 thermal treatment (solution heat treatment and artificial aging). It turned out that AlSi7Mg alloy after simultaneous barbotage refining with argon and grain refining with titanium-boron and modified with strontium was characterised with lower values of representative microstructure parameters (SDAS – secondary dendrite arm spacing, λE, lmax) and lower value of the porosity ratio compared to the alloy refined traditionally with Dursalit EG 281 and grain refining with titanium-boron and modified with sodium. The higher values of mechanical properties and fatigue strength parameters were obtained for the alloy simultaneously barbotage-refined with argon and grain refining with titanium-boron and modified with strontium.

Słowa kluczowe

EN

alloy AlSi7Mg; refining; modification; cooling rate; microstructural parameters; usable properties

PL

stop AlSi7Mg; rafinacja; modyfikacja; szybkość chłodzenia; parametry mikrostruktury; właściwości użytkowe

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2016
• Tom: Vol. 16, iss. 3
• Strony: 129--132
• Opis fizyczny: Bibliogr. 19 poz., il., tab., wykr.

Twórcy

autor

Tupaj M.

• Rzeszow University of Technology, Department of Casting and Welding, Rzeszów, Poland

autor

Orłowicz A. W.

• Rzeszow University of Technology, Department of Casting and Welding, Rzeszów, Poland

autor

Mróz M.

• Rzeszow University of Technology, Department of Casting and Welding, Rzeszów, Poland

autor

Trytek M.

• Rzeszow University of Technology, Department of Casting and Welding, Rzeszów, Poland

autor

Markowska O.

• Rzeszow University of Technology, Department of Casting and Welding, Rzeszów, Poland

Bibliografia

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• [4] Pietrowski, S. (2001). Silumins (Siluminy). Łódź: Politechnika Łódzka. (in Polish).
• [5] Orłowicz, A., Tupaj, M. & Mróz, M. (2008). Effect of cooling rate on the λ2D - parameter with sodium modified AlSi7Mg alloy. Archives of Foundry Engineering. 8(1), 245-248.
• [6] Orłowicz, A., Tupaj, M. & Mróz, M. (2008). Effect of cooling rate on the structure of hypoeutectic silumin after sodium modification. Rudy i Metale Nieżelazne. 53(7), 425-429.
• [7] Maier, E. & Lang, G. (1985). Preparation and properties of aluminum casting alloy AlSi7Mg after modification with Na, Sr and Sb (Herstellung und Eigenschaften der Aluminium Gusslegierungen AlSi7Mg unter Berücksichtigung ihrer Veredelung mit Na, Sr und Sb). Aluminium, 61 Jahrgang. 12, 897-906. (in German).
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• [13] Cáceres, C. H. & Wang, Q.G. (1996). Dendrite cell size and ductility of Al-Si-Mg casting alloys: Spear and Gardner revisited. Int. J. Cast Metals Res. 19, 157-162.
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• [15] Ronto, V. & Roosz, A. (2001). The effect of cooling rate and composition and com-position on the secondary dendrite arm spacing during solidification Part I: Al-Cu-Si alloy. Int. J. Cast Metals Res. 13, 337-342.
• [16] Stolarz, J., Madelaine-Dupuich, O. & Magnin, T. (2001). Microstructural factors of low cycle fatigue damage in two phase Al-Si alloys. Materials Science and Engineering A. 299, 275-286.
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Uwagi

PL

Opracowane ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.