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Effect of Solutionizing Time and Quenching Media on the Structure and Mechanical Properties of Al-5.6%Zn-2.5%Mg Alloy


C. C. Odinachi, K. C. Nnakwo, V. I. Nwoke, E. E. Nnuka
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This research investigated the effect of solutionizing time and quenching media on the structure and mechanical properties of Al-5.6%Zn-2.5%Mg alloy. The samples were prepared using sand casting technique, machined and subjected to solution heat treatment at temperature of 300oC for 30, 90 and 150minutes respectively. Subsequently, the samples were quenched in water, brine, palm oil and SAE40 respectively. Mechanical properties such as percentage elongation, ultimate tensile strength, hardness and impact strength of the alloy were determined using JPL tensile strength tester (Model: 130812), dynamic hardness tester and impact testing machine (Model: U1820) respectively, while the alloy microstructures were studied using an optical metallurgical microscope (Model: L2003A) and scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDS). The microstructural analysis revealed coarse micro-segregation of intermetallic compound (MgZn2) in the control sample and presence of uniformly distributed fine grains of intermetallic compound (MgZn2) in the heat treated specimens. The results of the mechanical tests conducted showed that heat treatment significantly improved the ultimate tensile strength, impact strength and percentage elongation of the alloy. This was probably as a result of the presence of uniformly distributed fine grains of intermetallic compound (MgZn2) in the alloy structure. Heat treatment created no room for solute redistribution of Mg and Zn and hence caused the elimination of micro-segregation of MgZn2 in the alloy structure. Maximum impact strength of 12J was obtained by sample solutionized for 30 minutes and quenched in water. The control sample had the maximum hardness value which could be attributed to the presence of coarse intermetallic compound (MgZn2) in the alloy structure.

C. C. Odinachi, K. C. Nnakwo, V. I. Nwoke, E. E. Nnuka

Solutionizing Time, Quenching Media, Structure, Mechanical Properties

  1. Adeosun S. O., Balogun S. A., Osoba L. O.,   Ayoola W. A. and Oladoye A. M. (2011) Effect of Cu and Zn Addition on the Mechanical Properties of Structural Aluminium Alloy. Journal of Modern Manufacturing Technology 3(1); pp. 103-110.
  2. Senkov O.N., Bhat R.B. and Senkova S.V. (2004) Metallic Materials with High Structural Efficiency, O.N. Senkov, D.B. Miracle, S.A. Firstov, Eds, (Kluwer Acad. Publishers, Dordrecht, Netherlands. Page: 151-162.
  3. Zyska A., Konopka Z., ??giewka M. and Nadolski M. (2008) Heat Treatment of Squeezed Al-Zn-Mg Alloy. Archives of Foundry Engineering, Vol. 8, pp. 123-126.
  4. Ridhwan J., Noor J. A., Zakaria M. S., Zulfattah Z. and Hafidzal M. H. M. (2014) Effect of Heat Treatment on Microstructure and Mechanical Properties of 6061 Aluminium Alloy. Journal of Engineering and Technology. Vol. 5 No. 1, pp. 89-98.
  5. Abubakre O. K., Mamaki U. P. and Muriana R. A. (2009) Investigation of the Quenching Properties of Selected Media on 6061 Aluminum Alloy. Journal of Minerals and Materials Characterization and Engineering, Vol. 8, No.4, pp 303-315.
  6. Salem S., Giulio T. and Ingvar L. Svensson (2006) Influence of quench rate on the microstructure and mechanical properties of aluminium alloys A356 and A354. International Foundry Research/ Giessereiforschung. Vol: 59, No. 1, page: 1-10.
  7. Federico F. (2010) Influence of Quench Rate on the Hardness Obtained after Artificial Ageing of an Al-Si-Mg Alloy. Materials and Manufacturing – Casting. Jönköping Institute of Technology, Gjuterigatan. Page: 1-62.
  8. Chee Fai Tan and Mohamad R. (2009) Effect of Hardness Test on Precipitation Hardening Aluminium Alloy 6061-T6. Chiang Mai J. Sci. 36(3): 276-286.
  9. Esezobor D.E. and Adeosun S. O. (2006) Improvement on the Strength of 6063 Aluminum Alloy by Means of Solution Heat Treament. Materials Processing Challenges for the Aerospace Industry Organized by L.L. Shaw, S.L. Semiatin, R.F. Mignogna, and J.P. Singh Materials Science and Technology (MS&T). Page: 645-655.
  10. Mohammad S. K., Tamzid I. M., Ehsan A. A. and Md M. I. (2014) The Influence of Ageing Time and Temperature on the Structure and Properties of Heat Treated A201.0 Aluminum Alloy. International Journal of Recent Technology and Engineering (IJRTE). Vol: 3, Issue: 3, pg: 78-83.
  11. Cong-hui L., Xin-ming Z., Jian-guo T., Xing-xing L. and Liang C. (2014) Effect of copper on precipitation and baking hardening behaviour of Al?Mg?Si alloys. Trans. Nonferrous Met. Soc., China. Vol: 24, page: 2289?2294.
  12. Mrówka-Nowotnik G. and Sieniawski J. (2005) Influence of heat treatment on the microstructure and mechanical properties of 6005 and 6082.13th International Scientific Conference on Achievements in Mechanical and Materials Engineering, Poland. Page: 447-450.
  13. Nnuka E. (1985) Investigation and Design of Metallurgical Ways of Improving the Mechanical Properties of Cast Aluminium Alloys. Ph.D. Thesis. Minsk. BSSR, pp. 250.

Publication Details

Published in : Volume 3 | Issue 5 | July-August - 2017
Date of Publication Print ISSN Online ISSN
2017-08-31 2395-1990 2394-4099
Page(s) Manuscript Number   Publisher
01-07 IJSRSET1733130   Technoscience Academy

Cite This Article

C. C. Odinachi, K. C. Nnakwo, V. I. Nwoke, E. E. Nnuka, "Effect of Solutionizing Time and Quenching Media on the Structure and Mechanical Properties of Al-5.6%Zn-2.5%Mg Alloy", International Journal of Scientific Research in Science, Engineering and Technology(IJSRSET), Print ISSN : 2395-1990, Online ISSN : 2394-4099, Volume 3, Issue 5, pp.01-07, July-August-2017.
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