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Fluidity Characteristics of A201 and A206 Al-Cu Alloy

Yildirim K., Helvaci M., Gürsoy Ö., Erzi E., Kahruman C., Dispinar D.

Archives of Foundry Engineering

2018

Vol. 18, iss. 1

135--138

Al-4.5Cu alloys are widely used in aerospace industries due to their low weight and high mechanical properties. This group of aluminium alloys is known as 2xx series and exhibits the highest mechanical properties however this alloy is known to suffer from feedability and high tendency for hot tearing. Al-Si alloys (3xx) have improved fluidity and better feedability particularly by several modifications such as Ti, B or Sr. Eutectic temperature is decreased and mechanical properties can be enhanced. Yet, the strength values of this alloy group cannot reach the values of 2xx series. Therefore, in this study, the effect of Ag addition on the fluidity of Al-4.5Cu alloy has been investigated. Standard size spiral mould was used. The casting temperature was selected to be 770oC. Five castings were made and Weibull statistical approach was used to evaluate the results. In addition, coating of the die with BN was also investigated. It was found that Ag addition and BN coating of the die revealed the most reproducible, reliable and high fluidity values.

Stan obecny i perspektywy rozwoju badań nad lejnością metali i stopów

Mutwil J., Bydałek A., Niedźwiedzki D.

Krzepnięcie Metali i Stopów

1998

nr 37

53--58

W opracowaniu dokonano oceny współczesnych badań nad lejnością metali i stopów. Wykazano brak istotnego postępu w rozwoju najczęściej stosowanych technik pomiarowych. Przedstawiono koncepcje badań, które mogą się przyczynić zarówno do rozwoju teorii procesów odlewniczych, jak również programów symulujących proces tworzenia odlewu we wnęce formy odlewniczej.

A review of the state of art. of investigations on the fluidity of metals and alloys has been presented. Non significant development in the field of the measurement techniques has been revealed. An investigations conception, which allow to develop the theory of the foundry processes, as well as the simulation programmes of cast formation in the foundry mould has been presented.