Investigations of linear contraction and shrinkage stresses development in hypereutectic al-si binary alloys

• Autorzy: Mutwil J. , Kujawa K. , Bajon G. , Hajn P.
• Języki publikacji: EN

Abstrakty

EN

Shrinkage phenomena during solidification and cooling of hypereutectic aluminium-silicon alloys (AlSi18, AlSi21) have been examined. A vertical shrinkage rod casting with circular cross-section (constant or fixed: tapered) has been used as a test sample. Two type of experiments have been conducted: 1) on development of the test sample linear dimension changes (linear expansion/contraction), 2) on development of shrinkage stresses in the test sample. By the linear contraction experiments the linear dimension changes of the test sample and the metal test mould as well a temperature in six points of the test sample have been registered. By shrinkage stresses examination a shrinkage tension force and linear dimension changes of the test sample as well a temperature in three points of the test sample have been registered. Registered time dependences of the test bar and the test mould linear dimension changes have shown, that so-called pre-shrinkage extension has been mainly by mould thermal extension caused. The investigation results have shown that both: the linear contraction as well as the shrinkage stresses development are evident dependent on metal temperature in a warmest region the sample (thermal centre).

Słowa kluczowe

EN

linear contraction; shrinkage stresses; hypereutectic aluminium silicon alloy

PL

skurcz liniowy; naprężenie skurczowe; stop nadeutektyczny; stop aluminiowo-krzemowy

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2009
• Tom: Vol. 9, iss. 4
• Strony: 157--164
• Opis fizyczny: Bibliogr. 4 poz., wykr.

Twórcy

autor

Mutwil J.

autor

Kujawa K.

autor

Bajon G.

autor

Hajn P.

• Zakład Inżynierii Jakości, Instytut Informatyki i Zarządzania Produkcją, Wydział Mechaniczny, Uniwersytet Zielonogórski, ul. prof. Z. Szafrana 4, 65-516 Zielona Góra,

Bibliografia

• [1] J. Mutwil, Design changes of device to investigation of alloys linear contraction and shrinkage stresses, Archives of Foundry Engineering, Vol. 9, Issue 4, (2009) 149-156.
• [2] J. Mutwil, K. Kujawa, P. Marczewski, P. Michajłow, Influence of silicon concentration on linear contraction process of Al-Si binary alloy, Archives of Foundry Engineering, Vol. 8, Issue 4, (2008) 141-148.
• [3] 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.
• [4] D. Eskine, L. Katgerman, Contraction behaviour of aluminium alloys during solidification, International Foundry Research, Vol. 59, No 2, (2007) 8-13.