Observation of Hot Tearing in Sr-B Modified A356 Alloy

ULUDAĞ, Muhammet | ÇETİN, Remzi | DIŞPINAR, Derya.

In this work, T-shaped mould design was used to generate hot spot and the effect of Sr and B on the hot tearing susceptibility of A356 was investigated. The die temperature was kept at 250°C and the pouring was carried out at 740°C. The amonut of Sr and B additions were 30 and 10 ppm, respectively. One of the most important defects that may exist in cast aluminium is the presence of bifilms. Bifilms can form by the surface turbulence of liquid metal. During such an action, two unbonded surfaces of oxides fold over each other which act as a crack. Therefore, this defect cause many problems in t ...Daha fazlası

Makale 2017 De Gruyter Open Ltd 4 Görüntülenme

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The effects of degassing, grain refinement & Sr-addition on melt quality-hot tear sensitivity relationships in cast A380 aluminum alloy

ULUDAĞ, Muhammet | ÇETİN, Remzi | DIŞPINAR, Derya | TİRYAKİOĞLU, Murat

Hot tearing tendency of A380 with various element additions (Sr, Sr+Ti, Ti, B and B+Sr) was investigated. Constrained rod casting (CRC) hot tearing test method was used to characterize the hot tearing sensitivity. Reduced pressure test (RPT) samples were produced from each condition and all trials were repeated three times. Number density of pores on the cross section of RPT samples was calculated via digital image processing and statistical analysis was carried out. Microstructure analysis was carried out to observe the effect of alloying elements. Hot torn cross sections were subjected to SE ...Daha fazlası

Makale 2018 Elsevier Ltd 3 Görüntülenme

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Grain Refinement, Modification, Degassing and Melt Quality Relationship in Al-7Si-0.3Mg

ÇETİN, Remzi | ULUDAĞ, Muhammet | DIŞPINAR, Derya

In this work, Al-7Si-0.3Mg alloy was studied. The alloy conditions was selected to be as-received, AlB3 grain refined and Sr modified. For each parameter, castings were made before and after degassing. In order to quantify the melt quality, reduced pressure test was used and bifilm index measurements were made. All the cast parts were subjected to metallographical examination, and thus, porosity measurements, distribution, area fraction were compared for each of the casting conditions.

Makale 2014 5 Görüntülenme

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Koleksiyon [3]

Ambargo Durumu [1]

Tam Metin [1]

Yayın Türü [1]

Yazar/lar [5]

Atıf Dizini [2]

Konu Başlıkları [10]

Yayıncı [2]

Yayın Tarihi [3]

Yayın Dili [1]