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YAŞLANDIRMA SICAKLIĞININ KOKİL VE ALÇAK BASINÇ DÖKÜM İLE ÜRETİLEN A357 ALÜMİNYUM ALAŞIMLI PARÇANIN MİKRO YAPI ve SERTLİĞİNE ETKİSİ

Year 2018, Volume: 2 Issue: 26, 11 - 17, 07.11.2018

Abstract

A357 alüminyum alaşımı yaygın olarak otomotiv, enerji, havacılık ve
mühendislik uygulamalarında kullanılır. Bu çalışmada, A357 alüminyum alaşımı
parçalar kokil döküm ve alçak basınç döküm yöntemleriyle üretilmiştir. T6 ısıl
işlemi uygulanmıştır. İlk olarak numuneler 540° C sıcaklıkta 7 saat boyunca
çözeltiye alınmış ve sonrasında oda sıcaklığında su verilmiştir. Bu işlemden
sonra, yapay yaşlandırma işlemi 150°C ve 170°C sıcaklıklarda yapılmıştır.
Vickers sertlik değişimleri gözlenmiştir. İki farklı döküm yöntemi için de
sertlik, ısıl işlemsiz koşullara göre ilk birkaç saat içinde artmıştır. Ayrıca
dendritik mikro yapı ısıl işlem sonrasında homojen yapıya dönüşmüştür.
Başlangıçta alçak basınç döküm yöntemiyle üretilen parça kokil döküm yöntemiyle
üretilen parçaya kıyasla daha yüksek sertlik, daha 
düşük
ikincil dendritic kol mesafesi ve daha az porozite göstermiştir. T6 ısıl
işleminden sonra alçak basınç döküm yöntemiyle üretilen parçanın, kokil döküm
yöntemiyle üretilen parçaya göre avantajları kısmen yok olmaktadır.

References

  • Canale L.C.F, Kavalco P.M, Totten G.E. (2009), Quenching Fundamentals Quenching of Aluminum Alloys: Cooling rate, strength, and intergranular corrosion, Heat Treating Progress, 25-30
  • Es-Said O.S,Lee D., Pfost W.D., Thompson D.L., Patterson M.,Foyos J., Marloth R. (2002). Alternative heat treatments of A357-T6 aluminum alloy. Engineering Failure Analysis, 9, 99-107
  • Kaufman J.G. and Rooy E.L. (2004). Aluminum Alloy Castings: Properties, Processes, and Applications, ASM International, 1-65.
  • MIL-A-21180D, (1984), 5 November 1984. Military Specification Aluminum-Alloy Castings, High Strength
  • The American Foundry Society Technical Dept Aluminum Alloys,., Schaumburg, Illiniois, Engineering Casting Solutions 2006 Casting Source Directory 30-34
  • Wang Q.G. (2003) December. Microstructural Effects on the Tensile and Fracture Behavior of Aluminum Casting Alloys A356/357.Metallurgical and Materials Transactions A, 34A, 2887- 2899

AGING TEMPERATURE EFFECT on HARDNESS and MICROSTRUCTURE of A357 ALUMINIUM ALLOY PART WHICH PRODUCED by GDC and LPDC

Year 2018, Volume: 2 Issue: 26, 11 - 17, 07.11.2018

Abstract

 A357
aluminium alloy commonly used in automotive, energy, aerospace and engineering
applications. In this study, A357 aluminium alloy parts produced by Gravity Die
Casting (GDC) and Low Pressure Die Casting (LPDC) methods were used. T6 heat
treatment was applied. Firstly, samples are solutionized at 540
o C
during 7 hours, then quenched at room temperature water. After that,
artificially aged at 150°C and 170°C aging temperatures. Their Vickers hardness
changes have observed. For two different casting methods, the hardness
increases in the first few hours according to the untreated conditions. Also,
dendritic microstructure has changed to homogeneous microstructure after heat
treatment. At the beginning, the part which produced by Low Pressure Die
Casting method shows higher hardness, lower secondary dendritic arm spacing
(SDAS) value and lower porosity against gravity die cast part. After T6 heat
treatment LPDC part’s advantages against GDC method has partially disappeared.

References

  • Canale L.C.F, Kavalco P.M, Totten G.E. (2009), Quenching Fundamentals Quenching of Aluminum Alloys: Cooling rate, strength, and intergranular corrosion, Heat Treating Progress, 25-30
  • Es-Said O.S,Lee D., Pfost W.D., Thompson D.L., Patterson M.,Foyos J., Marloth R. (2002). Alternative heat treatments of A357-T6 aluminum alloy. Engineering Failure Analysis, 9, 99-107
  • Kaufman J.G. and Rooy E.L. (2004). Aluminum Alloy Castings: Properties, Processes, and Applications, ASM International, 1-65.
  • MIL-A-21180D, (1984), 5 November 1984. Military Specification Aluminum-Alloy Castings, High Strength
  • The American Foundry Society Technical Dept Aluminum Alloys,., Schaumburg, Illiniois, Engineering Casting Solutions 2006 Casting Source Directory 30-34
  • Wang Q.G. (2003) December. Microstructural Effects on the Tensile and Fracture Behavior of Aluminum Casting Alloys A356/357.Metallurgical and Materials Transactions A, 34A, 2887- 2899
There are 6 citations in total.

Details

Primary Language English
Journal Section 26. Sayı Cilt II (ÖZEL SAYI)
Authors

Gazican Özkan

Bahadır Uyulgan

Publication Date November 7, 2018
Submission Date February 28, 2018
Published in Issue Year 2018 Volume: 2 Issue: 26

Cite

APA Özkan, G., & Uyulgan, B. (2018). AGING TEMPERATURE EFFECT on HARDNESS and MICROSTRUCTURE of A357 ALUMINIUM ALLOY PART WHICH PRODUCED by GDC and LPDC. Soma Meslek Yüksekokulu Teknik Bilimler Dergisi, 2(26), 11-17.
AMA Özkan G, Uyulgan B. AGING TEMPERATURE EFFECT on HARDNESS and MICROSTRUCTURE of A357 ALUMINIUM ALLOY PART WHICH PRODUCED by GDC and LPDC. Soma MYO Teknik Bilimler Dergisi. November 2018;2(26):11-17.
Chicago Özkan, Gazican, and Bahadır Uyulgan. “AGING TEMPERATURE EFFECT on HARDNESS and MICROSTRUCTURE of A357 ALUMINIUM ALLOY PART WHICH PRODUCED by GDC and LPDC”. Soma Meslek Yüksekokulu Teknik Bilimler Dergisi 2, no. 26 (November 2018): 11-17.
EndNote Özkan G, Uyulgan B (November 1, 2018) AGING TEMPERATURE EFFECT on HARDNESS and MICROSTRUCTURE of A357 ALUMINIUM ALLOY PART WHICH PRODUCED by GDC and LPDC. Soma Meslek Yüksekokulu Teknik Bilimler Dergisi 2 26 11–17.
IEEE G. Özkan and B. Uyulgan, “AGING TEMPERATURE EFFECT on HARDNESS and MICROSTRUCTURE of A357 ALUMINIUM ALLOY PART WHICH PRODUCED by GDC and LPDC”, Soma MYO Teknik Bilimler Dergisi, vol. 2, no. 26, pp. 11–17, 2018.
ISNAD Özkan, Gazican - Uyulgan, Bahadır. “AGING TEMPERATURE EFFECT on HARDNESS and MICROSTRUCTURE of A357 ALUMINIUM ALLOY PART WHICH PRODUCED by GDC and LPDC”. Soma Meslek Yüksekokulu Teknik Bilimler Dergisi 2/26 (November 2018), 11-17.
JAMA Özkan G, Uyulgan B. AGING TEMPERATURE EFFECT on HARDNESS and MICROSTRUCTURE of A357 ALUMINIUM ALLOY PART WHICH PRODUCED by GDC and LPDC. Soma MYO Teknik Bilimler Dergisi. 2018;2:11–17.
MLA Özkan, Gazican and Bahadır Uyulgan. “AGING TEMPERATURE EFFECT on HARDNESS and MICROSTRUCTURE of A357 ALUMINIUM ALLOY PART WHICH PRODUCED by GDC and LPDC”. Soma Meslek Yüksekokulu Teknik Bilimler Dergisi, vol. 2, no. 26, 2018, pp. 11-17.
Vancouver Özkan G, Uyulgan B. AGING TEMPERATURE EFFECT on HARDNESS and MICROSTRUCTURE of A357 ALUMINIUM ALLOY PART WHICH PRODUCED by GDC and LPDC. Soma MYO Teknik Bilimler Dergisi. 2018;2(26):11-7.