Experimental Investigation Of Modified Heat Treatment Of AK64-Type Al-Si-Cu Sand Cast Alloy

• Autorzy: Cupido L. H. , Żak P. L. , Mahomed N. , Lelito J. , Piwowarski G. , Krajewski P. K.

Identyfikatory

DOI

10.1515/amm-2015-0391

Warianty tytułu

PL

Eksperymentalne badania zmodyfikowanej obróbki cieplnej odlewu piaskowego ze stopu Al-Si-Cu typu AK64

• Języki publikacji: EN

Abstrakty

EN

An experimental investigation was conducted to observe and analyze the microstructural evolution of phases present in the AK64 Al-Si-Cu alloy subjected to a modified T6 heat treatment (HT). The AK64 alloy1 is the Polish alternative of the A319.0 ASM standard aluminium alloy. The modified T6 HT schedule with a higher temperature and shorter duration was applied in the solutioning process and lower quenching and higher artificial ageing temperature than the prescribed by the ASM standard were used. The cooling curves registered during the liberating of overheating and solidifying processes give important information on nucleation temperatures for the Al dendrite network, Al-Si eutectic reaction and precipitation of Cu-rich phases. Comparison of the as-cast and heat treated microstructures revealed predicted microstructural changes and also partial fragmentation of the Fe-rich phases was observed after the application of the modified HT programme.

PL

Artykuł poświęcony jest obróbce cieplnej stopu AK64, który jest odpowiednikiem stopu ASM: A319.0. W badaniach zastosowano zmodyfikowaną obróbkę cieplną T6 o podwyższonej (w stosunku do procedury T6 HT – ASM) temperaturze wyżarzania i skróconym czasie starzenia naturalnego po przesyceniu w wodzie. Obserwacje struktury stopu po obróbce cieplnej wykazały dużą zgodność ze strukturami przewidzianymi na podstawie przeprowadzonych symulacji numerycznych. Dodatkowo określono wartości temperatury odpowiadającej początkowi zarodkowania fazy α(Al), reakcji eutektycznej Al-Si oraz wydzielania z roztworu fazy bogatej w Cu. Opisano również częściową fragmentację fazy zawierającej Fe, będącą następstwem zastosowanej zmodyfikowanej obróbki cieplnej.

Słowa kluczowe

EN

aluminium Al-Si-Cu cast alloy; T6 heat treatment; nucleation temperature; Al2Cu phases; Al-Fe-Si phases

PL

aluminium Al-Si-Cu odlewane ze stopu; obróbka cieplna T6; temperatura zarodkowania; fazy Al2Cu; fazy Al-Fe-Si

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2015
• Tom: Vol. 60, iss. 3
• Strony: 2397--2402
• Opis fizyczny: Bibliogr. 23 poz., rys.

Twórcy

autor

Cupido L. H.

• Department of Mechanical Engineering, Cape Peninsula University of Technology, Bellville, South Africa

autor

Żak P. L.

• Faculty of Foundry Engineering, AGH University of Science and Technology, Krakow, Poland

autor

Mahomed N.

• Department of Mechanical Engineering, Cape Peninsula University of Technology, Bellville, South Africa

autor

Lelito J.

• Faculty of Foundry Engineering, AGH University of Science and Technology, Krakow, Poland

autor

Piwowarski G.

• Faculty of Foundry Engineering, AGH University of Science and Technology, Krakow, Poland

autor

Krajewski P. K.

• Faculty of Foundry Engineering, AGH University of Science and Technology, Krakow, Poland

Bibliografia

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Uwagi

PL

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