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Al-Si-Mg DÖKÜM ALAŞIMLARINDA FİLTRASYONUN MEKANİK ÖZELLİKLERE VE MİKROYAPIYA ETKİSİ

THE EFFECTSON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF FILTRATION IN Al-Si-Mg ALLOYS

Journal Name:

  • Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

Publication Year:

  • 2014

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
In this study, on microstructure and mechanical properties of Al-Si-Mg alloy was investigated effects of ceramic foam filters having different density of cell. Ceramic foam filters is used to minimizing bifilm, inclusion, sand wash away from of the mould wall, gas or shrinkage porosity such as casting defects. As a result of the tensile test results were evaluated with Weibull distribution and the quality index. Mechanical properties and castability were examined by ceramic foam filters using in Al-Si-Mg alloy. Experimental studies were used on horizontal runner a ceramic foam filter having different density of cell (20 and 30 ppi). According to Tensile test results, due to the increased density of ceramic foam filter cell gap could be controlled flow behaviour of the liquid metal in the running system. Improving mechanical properties of Al-Si-Mg alloy has been demonstrated by increasing Weibull modulus and quality index. In addition to increasing the amount of cell gap in ceramic foam filter, quality index is also increasing. Tensile fracture surfaces of samples was investigated Scanning Electron Microscope (SEM), to fracture occurs secondary intermetallic phases, inclusion and bifilm defect concentration regions.
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Abstract (Original Language): 
Bu çalışmada, farklı hücre yoğunluğuna sahip seramik köpük filtrelerin Al-Si-Mg alaşımının mikro yapı ve mekanik özellikleri üzerine etkisi incelenmiştir. Seramik köpük filtreler, bifilm, inklüzyon, kum sürüklenmesi, gaz veya çekme boşluğu gibi döküm hatalarını minimize edilmesinde kullanılmaktadır. Deneysel çalışmalarda yatay yolluk üzerinde farklı hücre yoğunluğuna sahip seramik köpük filtreler (20 ve 30 ppi) kullanılmıştır. Al-Si- Mg alaşımının seramik köpük filtreler kullanılarak dökülebilirliği ile alaşımın mekanik özellikleri incelenmiştir. Yapılan çalışmalar sonucunda, çekme testi sonuçları iki dağılımlı Weibull istatistiksel analizi ve kalite endeksi ile değerlendirilmiştir. Çekme test sonuçlarına göre, seramik köpük filtrenin hücre yoğunluğunun artmasına bağlı olarak sıvı metal hareketinin yolluk sisteminde kontrol edilebilmiştir. Al-Si-Mg alaşımın mekanik özelliklerinin iyileştiği Weibull modülü ve kalite endeksindeki artışıyla ile ortaya konmuştur. Ayrıca, seramik köpük filtrenin hücre boşluk miktarının artması ile kalite endeksi de artmaktadır. Çekme numuneleri kırık yüzeyleri tarama elektron mikroskobunda (SEM) incelendi, kırılmanın intermetalik ikincil fazların, inklüzyon ve bifilm hataların yoğunlaştığı bölgelerde gerçekleştiği gözlenmiştir.
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REFERENCES

References: 

1. Miller W.S.,Zhuang L., Bottema J., Wittebrood
A.J., De Smet P., Haszler A., Vieregge A.,
“Recent Development in Aluminium Alloys for
The Automotive Industry”, Materials Science
and Engineering A, 280, 37–49, 2000.
2. Edwards K.L., “Strategic Substitution of New
Materials for Old: Applications in Automotive
Product Development”, Materials and Design,
25, 529-533, 2004.
3. Campbell J.,Casting, Butterworth-
Heinemann,Oxford, United Kingdom, 2003.
4. Campbell J.,Castings Practice The 10 Rules of
Castings, Butterworth-Heinemann, Oxford,
United Kingdom, 2004.
5. Ruddle R.W.,M.A., F.I.M.,The Running and
Gating of Sand Castings, TheInstıtue of Metals,
1956.
6. Dai X.,Yang X.,Campbell J., Wood J., “Effect of
Runner System Design on The Mechanical
Strength of Al-7Si-Mg Alloy Casting”, Materials
Science Engineering A,315-325, 2003.
7. Hsu F.Y.,Jolly M.R., Campbell J., “A Multiplegate
Runner System for GravityCasting”,
Journal of Materials Processing
Technology,Volume 209, 17, 5736-5750, 2009.
8. Hsu F-H., Lin H-J., “A Diffusing Runner for
Gravity Casting”, Metallurgical and Materials
Transactions B, Volume 40B, 833-842, 2009.
9. Reilly C.,Green N.R., Jolly M.R., “SurfaceOxide
Film Entrainment Mechanisms in Shape Casting
Running System”, Metallurgical and Materials
Transactions B, Volume 40B, 850-858, 2009.
10. Mbuya T.O.,Oduori M.F., Rading G.O., Wekesa
M.S., “Effect of Runner Design on Mechanical
Properties of Permanent Mould Aluminium”,
International Journal of CastMetals Research,
Volume 19, 2006.
11. Mi J., Harding, R.A., Campbell, J., “Effects of
TheEntrained Surface Film on Th eReliability of
Castings”, Metallurgical and Materials
Transactions A-Physical Metallurgy and
Materials Science 35A, 9, 2893-2902., 2004.
12. Özyürek D.,Özdemir Ş.,“Inclusion removal from
casting with ceramics filters”, Journal of
Faculty of Engineering and Architecture of
Gazi University, Vol 10, No 2, 11-28, 1995.
13. Tunçay T., Tekeli S., Özyürek D., “TheEffect of
Diffuser and Non-Diffuser Runner Systems on
The Mechanical Properties of A356 Alloy”.,
Journal of Faculty of Engineeringand
Şekil 8. 30 ppi seramik köpük filtre ile dökülen Al-Si-Mg alaşımının çekme numunesi kırık yüzey SEM
görüntüleri (a,b) (SEM images (a,b) of tensile fracture surfaces of Al-Si-Mg alloy sample casted with 30 ppi ceramic foam
filter).
a) b)
Al-Si-Mg Döküm Alaşımlarında Filtrasyonun Mekanik Özelliklere ve Mikroyapıya Etkisi T. Tunçay, D. Özyürek
Gazi Üniv. Müh. Mim. Fak. Der. Cilt 29, No 2, 2014 279
Architecture of Gazi University, Vol 28, No
2,241-249, 2013.
14. Habibollah Zadeh A., Campbell, J., “Filter
systems for high velocity liquid metal flow”.,
International Journal of Cast Metals
Research, Volume 17., 99-106, 2004.
15. Hashemi H.,Raiszadeh R., “Naturally-Pressuized
Running System : The rol of Ceramics Filters”,
Journal of Applied Science., Volume 9, 2115-
2122, 2009.
16. Bozchaloei G.E.,Varahram N., Davami P., Kim
S.K., “Effect of oxide bifilms on the mechanical
properties of cast Al–7Si–0.3Mg alloy and the
roll of runner height after filter on their
formation”., Materials Science and Engineering
A 548., 99-105, 2012.
17. Dışpınar D.,Campbell J., “Critical Assesment of
ReducedPressure Test. Part1: Porosity
Phenomena”, International Journal of Cast
Metals Research, Volume 17., No.5.2004.
18. Weibull, W., “A Statistical Distribution Function
of Wide Applicability”, Journal of Applied
Mechanics, 18, 293-297, 1951.
19. G. Eisaabadi B.,Davami P., Kim S.K.,
Tiryakioğlu M., “The effect of melt quality and
filtering on the Weibull distributions of tensile
properties in Al–7%Si–Mg alloy castings”.,
Materials Science and Engineering A579., 64–
70,2013
20. H-Rodríguez S., G-Reyes R. E., Dwivedi D.K.,
B-Hernández V.H., F-Zúñiga H.,. P-López M.J.,
“On influence of Ti and Sr on microstructure,
mechanical properties and quality index of cast
eutectic Al–Si–Mg alloy”., Materialsand Design
32., 1865–1871, 2011.
21. Warmuzek M.,Metallographic Tecniques for
Aluminum and Its Alloys, ASM Handbook,
Volume 9, 711-751, 2004.
22. Wang Q. G.,DavıdsonC. J. ,“Solidification and
precipitati on behaviour of Al-Si-Mg casting
alloys”.,Journal of MaterialsScience36,739-
750, 2001.
23. Campbell J., “Entrainment Defects”, Materials
Science and Technology, Volume 22, No 2, 127-
145, 2006.
24. Ma Z.,Samuel A.M., Samuel F.H., Doty H.W.,
Valtierra S., “A Study of Tensile Properties in
Al–Si–Cu and Al–Si–Mg alloys: Effect of β-iron
Intermetallics and Porosity”, Materials Science
and Engineering A ,490, 36-51, 2008.
25. Wang Q.G.,Cáceres C.H., “The fracture mode in
Al–Si–Mg casting alloys”., Materials Science
and Engineering A, Volume 241, 72-82,1998.
26. Çalın R.,Pul M., Pehlivanlı Z,O., “The Effect of
Reinforcement Volume Ratio on Porosity and
Thermal Conductivity in Al-MgO
Composites”., Materials Research,Vol 15, Iss
6, p 1-7 (2012).

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