Influence of silicon concentration on linear contraction process of Al-Si binary alloy

• Autorzy: Mutwil J. , Kujawa K. , Marczewski P. , Michajłow P.
• Języki publikacji: EN

Abstrakty

EN

Investigations of shrinkage phenomena during solidification and cooling of aluminium and aluminium-silicon alloys (AlSi5, AlSi7, AlSi9, AlSi11, AlSi12.5, AlSi18, AlSi21) have been conducted. A vertical shrinkage rod casting with circular cross-section (constant or fixed: tapered) has been used as a test sample. By constant cross-section a test channel mould was parted and allowed a constrained contraction to examine. No parted test channel mould was tapered and allowed an unconstrained contraction to investigate. In the experiments the dimensions changes of solidifying test bar and the test mould have been registered, what has allowed to explain a mechanism of pre-shrinkage extension of solidifying metals and alloys. Registered time dependence of the test bar and the test mould dimension changes have shown, that so-called pre-shrinkage extension has been by mould thermal extension caused. The investigation results have also shown that time- and temperature dependences of shrinkage of Al-Si alloys have been on silicon concentration depended.

Słowa kluczowe

EN

linear contraction; shrinkage; pre-shrinkage expansion; Al-Si alloys

PL

skurcz liniowy; skurcz; stop Al-Si; stężenie krzemu

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2008
• Tom: Vol. 8, iss. 4
• Strony: 141--148
• Opis fizyczny: Bibliogr. 8 poz., rys., tab.

Twórcy

autor

Mutwil J.

autor

Kujawa K.

autor

Marczewski P.

autor

Michajłow P.

• University of Zielona Góra, Department of Mechanical Engineering, ul. Podgórna 50, 65-246 Zielona Góra,

Bibliografia

• [1] J. Mutwil, New version of experimental setup for investigation of linear contraction and shrinkage stresses of metals and alloys, Archives of Foundry Engineering vol. 8, No. 4 (2008) 133-140.
• [2] J. Mutwil, Stand for investigation of linear contraction and shrinkage stresses in castings, Archives of Foundry, vol. 3, No. 8 (2003) 287-292 (in Polish).
• [3] J. Mutwil, Investigations of linear contraction of solidifying and self-cooling AlSi5.4 alloy, Archives of Foundry, vol. 6, No. 18/1 (2006) 67-72 (in Polish).
• [4] J. Mutwil, S. Kłos, Investigations of linear contraction of solidifying and self-cooling AlSi6.9 alloy, Archives of Foundry, vol. 6, No. 19 (2006) 201-206 (in Polish).
• [5] J. Mutwil, Linear contraction and shrinkage stresses in period of solidification and self-cooling of AlSi21 alloy, Archives of Foundry, vol. 6, No. 21 (2006) 93-100 (in Polish).
• [6] I. I. Novikov, Hot shortness of non-ferrous metals and alloys, Nauka, Moscow, 1966 (in Russian).
• [7] D. Eskine, J. Zuidema, L. Katgerman, Linear solidification contraction of binary and commercial aluminum alloys, International Journal of Cast Metals Research, vol. 14, No. 4 (2002) 217-224.
• [8] D. Eskine, L. Katgerman, Contraction behaviour of aluminium alloys during solidification, International Foundry Research, vol. 59, No. 2 (2007) 8-13.