Advertisement

Shape Casting pp 353-361 | Cite as

Change in Sr Modification by Duration and Its Effect on Mechanical Properties of A360 and A413 Alloy

  • Inal Kaan Duygun
  • Ozen Gursoy
  • Eray Erzi
  • Derya DispinarEmail author
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

Strontium modification has many advantages for the mechanical properties of Al–Si alloys. Holding time is an important factor in Sr modification. Its high affinity to oxygen may result in forming of \( {\text{SrO}}.{\text{Al}}_{2} {\text{O}}_{3} \) spinel oxides. Therefore, Sr quantity in the melt can decrease by time due to fading. In this work, this phenomenon was investigated in A360 and A413 alloys under different casting conditions. The melt was held at 700 °C for 4 and 17 h after the addition of 300 ppm Sr. Metallographic examination was carried out to observe the change in eutectic morphology. Melt quality change was measured by means of reduced pressure test. In addition, tensile test samples were produced. It was found that there is a clear correlation between mechanical properties and bifilm index of Al–Si alloys.

Keywords

A360 A413 Sr modification Melt quality Mechanical properties 

References

  1. 1.
    Eiken J, Apel M, Liang SM, Fetzer RS (2015) Impact of P and Sr on solidification sequence and morphology of hypoeutectic Al–Si alloys: combined thermodynamic computation and phase-field simulation. Acta Mater 98:152–163CrossRefGoogle Scholar
  2. 2.
    Xiang C, Yanxiang L (2010) Effects of strontium and boron interactions in Al–7Si alloys. China Foundry 7:328–330Google Scholar
  3. 3.
    Kahraman F, Kulekci MK (2007) Microstructure and Eutectic Morphology of Al–12.5% Si alloy refined with antimony. SAlj Fen Bilünleri Dergisi 1:10–14Google Scholar
  4. 4.
    Sarada BN, Srinivasamurthy PL (2013) Swetha, microstructural characteristics of Sr and Na modified Al–Mg–Si alloy. Intl J Innov Res Sci Eng Technol 2:3975–3983Google Scholar
  5. 5.
    Yu S, Shao-Ping P, Xue-Ran L, Zi-Run Y, Guo-Xiong S (2011) Nucleation and growth of eutectic cell in hypoeutectic Al−Si alloy. Trans Nonferrous Met Soc China 21:2186–2191CrossRefGoogle Scholar
  6. 6.
    Gruzleski John E, Closset Bernard M (1990) The treatment of liquid aluminum–silicon alloys. American Foundrymen’s Society, Inc., Des Plaines, IllinoisGoogle Scholar
  7. 7.
    Cross CE, Olson DL (1982) Modification of eutectic weld metal microstructure. Weld Res. Supplement, 381–387Google Scholar
  8. 8.
    Kósa A, Gácsi Z, Dúl J (2012) Effects of strontium on the microstructure of Al–Si casting alloys. Mater Sci Eng 37(2):43–50Google Scholar
  9. 9.
    Haquea MM, Ismail AF (2005) Effect of superheating temperatures on microstructure and properties of strontium modified aluminium–silicon eutectic alloy. In: 13th international scientific conference on achievements in mechanical and materials engineering, Gliwice-Wisla, pp 267–270Google Scholar
  10. 10.
    Sui Y, Wang Q, Wang G, Liu T (2015) Effect of Sr content on the microstructure and mechanical properties of cast Al–12Si–4Cu–2Ni–0,8Mg alloys. J Alloy Compd 622:572–579CrossRefGoogle Scholar
  11. 11.
    Samuel AM, Alkahtani SA, Doty HW, Samuel FH (2016) Porosity formation in Al–Si–Cu alloys. Int J Metall Mater Sci Eng 6:1–14Google Scholar
  12. 12.
    Uludağ M, Kocabaş M, Dışpınar D, Çetin R, Cansever N (2017) Effect of Sr and Ti addition on corrosion behaviour of Al–7Si–0,3Mg alloy. Arch Foundry Eng 17:125–130CrossRefGoogle Scholar

Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  • Inal Kaan Duygun
    • 1
  • Ozen Gursoy
    • 1
  • Eray Erzi
    • 1
  • Derya Dispinar
    • 1
    Email author
  1. 1.Faculty of Engineering, Department of Metallurgical and Materials EngineeringIstanbul University-CerrahpasaIstanbulTurkey

Personalised recommendations