Effect of Hot Pressing on the Microstructure and Hardness of ‎A390 ‎Cast Aluminum Alloy

Document Type : Original Research Article

Authors

1 M.Sc. Student, in Materials Engineering, Faculty of Materials and Industrial Engineering, Babol Noshirvani University of Technology, ‎Mazandaran, Iran

2 Associate Professor, Department of Materials Engineering, Babol Noshirvani University of Technology, Iran

10.22034/frj.2023.379626.1171

Abstract

In this research, the effect of the hot-pressing process on the microstructure and hardness of A390 cast aluminum-silicon alloy was investigated. The results were prepared using an optical microscope and hardness tester. The microstructure of the casting sample included very coarse primary silicones, acicular eutectic silicones, intermetallic compounds, and large alpha-phase dendrites. By increasing the amount of strain in the hot-pressing process, primary and eutectic silicones as well as intermetallic compounds were broken and finer, and their distribution in the alpha matrix became more uniform. The obtained results showed that the microstructure of the casting alloy has been improved in terms of the modification of primary silicon particles, eutectic silicon, and intermetallic compounds, as well as the uniform distribution of these particles and the removal of porosity. The initial silicon size is dramatically reduced from over 100 µm (for the cast sample) to less than 5 µm (after the seventh pass). By increasing the strain up to the fourth pass, the hardness of the alloy decreased from 87 to 65 HB. With the further increase of the strain from the fourth pass to the seventh (final) pass, the hardness value increased to 81 HB.

Keywords

Main Subjects

References

‏[1] Lashkari‏ O., Ajersch F., Charette A., Chen X.-G., Microstructure and rheological behavior of hypereutectic ‎semi-solid Al–Si alloy under low shear rates compression test, Materials Science and Engineering: A, 2008, 492(1) 377-382‎‏.‏
‏[2] ‏Cha G., Li J., Xiong S.‏, Han Z., Fracture behaviors of A390 aluminum cylinder liner alloys under static ‎loading, Journal of alloys and compounds, 2013, 550(2) 370-379‎‏.‏
‏[3] ‏Wang C., Yu F., Zhao D., Zhao X., Zuo L., Hot deformation and processing maps of DC cast Al-15% Si ‎alloy, Materials Science and Engineering: A 2013, 577(3) 73-80‎‏.‏
‏[4] ‏Saini N., Dwivedi D., Jain P., Singh H., Surface modification of cast Al-17% Si alloys using friction stir ‎processing, Procedia Engineering, 2015, 100(4) 1522-1531‎‏.‏
‏[5] Zhao ‏J.-W., Wu S.-S.‏, Microstructure and mechanical properties of rheo-diecasted A390 alloy, ‎Transactions of Nonferrous Metals Society of China, 2010, 20(5) s754-s757‎‏.‏
‏[6] ‏Ranjbarpour H., Nourouzi S., Hosseinipour S.J.,  Effect of pouring temperature and partial remelting on ‎microstructure and wear properties of A390 alloy in slope cooling casting, Founding Research Journal, 2017, 1(6) ‎‎37-46‎‏.
‏[7] ‏Birol Y., Cooling slope casting and thixoforming of hypereutectic A390 alloy, Journal of Materials ‎Processing Technology, 2008, 207(7) 200-203.
‏[8] Kapranos‏ P., Kirkwood D., Atkinson H., Rheinlander J., Bentzen J., Toft P., Debel C., Laslaz G., Maenner L. ‎, Blais S., Thixoforming of an automotive part in A390 hypereutectic Al–Si alloy, Journal of ‎Materials Processing Technology, 2003, 135(8) 271-277.‏
‏[9] ‏Damavandi E., Nourouzi S., Rabiee S.M., The effect of pouring temperature, mechanical vibration and ‎partial‎ remelting on microstructure and mechanical properties of Al-A390 alloy, Founding Research Journal, 2018, ‎‎2(1) 39-53‎‏.‏
‏[10] ‏Yu W‏.B., Yuan Z.-H., Guo Z.-P., Xiong S.-M., Characterization of A390 aluminum alloy produced at ‎different slow shot speeds using vacuum assisted high pressure die casting, Transactions of Nonferrous ‎Metals Society of China, 2017, 27(10) 2529-2538‎‏.
‏[11] ‏Mahmoud T., Surface modification of A390 hypereutectic Al–Si cast alloys using friction stir processing, ‎Surface and Coatings Technology, 2013, 228(11) 209-220‎‏.‏
‏[12] ‏Damavandi E., Nourouzi S., Rabiee S.M., Jamaati R., Effect of ECAP on microstructure and tensile ‎properties of A390 aluminum alloy, Transactions of Nonferrous Metals Society of China, 2019, 29(12) 931-‎‎940‎‏.
‏[13] ‏Damavandi E., Nourouzi S., Rabiee S.M., Jamaati R., Szpunar J.A., EBSD study of the microstructure and ‎texture evolution in an Al–Si–Cu alloy processed by route A ECAP, Journal of Alloys and Compounds, 2021, ‎‎858(14) 157651‎‏.
‏[14] Dey‏ S., Perry T., Alpas A., Micromechanisms of low load wear in an Al–18.5% Si alloy, Wear, 2009, 267(16) ‎‎515-524‎‏.
‏[15] ‏Elmadagli M., Alpas A., Sliding wear of an Al–18.5 wt.% Si alloy tested in an argon‎‏ ‏atmosphere and ‎against DLC coated counterfaces, Wear, 2006, 261(17) 823-834‎‏.
‏[16] ‏Elmadagli M., Alpas A., Progression of wear in the mild wear regime of an Al-18.5% Si (A390) alloy, ‎Wear, 2006, 261(18) 367-381.
‏[17] ‏Shabestari S.G., Ghanbari M., Effect of‏ ‏plastic deformation and semisolid forming on iron–manganese ‎rich intermetallics in Al–8Si–3Cu–4Fe–2Mn alloy, Journal of Alloys and Compounds, 2010, 508(2) 315-319.‏
‏[18] ‏Soleymanpour M., Aval H.J., Jamaati R., Achieving high strength and superior ductility in Al–Si alloy by ‎cold rolling and friction stir processing, Journal of Alloys and Compounds, 2022, 896, 163102.‏
‏[19] ‏Soleymanpour M., Aval H.J., Jamaati R., Manufacturing of high-toughness Al–Si alloy by rolling and ‎friction stir processing: Effect of traverse speed, CIRP Journal of Manufacturing Science and Technology, 2022, 37, 19-36.
‏[20] ‏Damavandi E., Nourouzi S., Rabiee S.M., Jamaati R., Szpunar J.A., Effect of Route BC Equal-Channel ‎Angular Pressing on the Microstructure, Microtexture, and Homogeneity of Al-18%Si-4.5%Cu Alloy, ‏Journal ‎of Materials Engineering and Performance, 2021, 30(2) 1577-1601‎‏.‏
Founding Research Journal
Volume 6, Issue 2 - Serial Number 20
December 2022
Pages 133-141

Files

History

  • Receive Date: 04 January 2023
  • Revise Date: 25 April 2023
  • Accept Date: 27 April 2023

Share

How to cite

Statistics