Effect of Mo Addition to ZA22 Alloy Grain Refined by Ti-B on its Metallurgical and Mechanical Characteristics in the as Cast Condition

Abstract:

Zinc aluminum alloys are getting increasingly in use in industrial and engineering applications especially after the development of zinc alloys with higher aluminum content. These new developed zinc aluminum based alloys have high strength and hardness, improved creep and wear resistances and lower density. However they have the disadvantage of solidifying in dendritic structure with large grain size which adversely affects their mechanical strength, toughness and surface quality. Grain refinement of metals and alloys by rare earth elements has engaged the materials researchers for the last seven decades. In this paper the effect of molybdenum addition diagram to zinc 22 wt. % aluminum, ZA22, alloy grain refined by Ti-B at a rate of 0.1 wt. %, which corresponds to the peretictic point on the Al-Zn phase diagram in the as cast condition was carried out. The effect of the addition on the metallurgical and mechanical characteristics of the alloy were investigated and the obtained results are presented and discussed.

• Periodical: Materials Science Forum (Volume 886)
• Pages: 64-68
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.886.64
• Online since: March 2017
• Authors: Safwan M.A. Al-Qawabah, Adnan I.O. Zaid
• Keywords: Cast Condition, Grain Refinement, Mechanical Characteristics, Metallurgical, Molybdenum, Titanium, Titanium-Boron, ZA22, Zinc Aluminum 22% Alloy

References

[1] A. Cibula: Journal Institute of Metals, Vol. 76 (1949-1950), pp.321-360.

[2] K.G. Budinsk:  Engineering Materials Selection Fourth Edition, Prentice-Hall, Inc., New JERSY(1992).

[3] W.D. Callister: Materials Science and Engineering and Engineering: an Introduction, Third Edition, John Wiley and Sons Inc., New York, (1994).

[4] C. L. Tsan, T. Nakata, and T. Hayashi, Effect of Zirconium, Titanium, Manganese, and Nickel Additions on Dendrite Morphology of Zinc-Aluminum Alloys. IMONO, V. 3, (1976), pp.167-174.

[5] M. Neacsu, E. Drugescu, and E. Vasilescu: Experimental Studies and Research during Heat Treatment on the Behaviour/Aging of Al-Zn Alloy System with Different Zn Contents, Metallurgy & Materials Science Vol. 29 (2011), pp.38-44.

[6] A. Tu¨rk, M. Durman, and E.S. Kayali: The Effect of Manganese on the Microstructure and Mechanical Properties of Zinc–Aluminum Based ZA-8 Alloy  Journal of Material  Science Vol. 42 (2007), p.8298–8305.

DOI: 10.1007/s10853-007-1504-2

[7] J. Pearson, M.E.J. Birch: The Effect of the titanium Boron Concentrations on Aluminum Grain Refining Alloy. Journal of Metals, Vol. 31 (1979), pp.27-31.

DOI: 10.1007/bf03354567

[8] A. Arjuna, A. Rao, B.S. Murty, and M. Chakraborty: Role of zirconium and impurities in the grain refinement of aluminum with Al-Ti-B, Material Science and Technology Vol. 13  (1997), pp.769-777.

DOI: 10.1179/mst.1997.13.9.769

[9] A.A. Abdel-Hamid, A.I.O. Zaid: Poisoning of Grain Refinement of Some Aluminum Alloys (Seventh, Cairo Intern. Conference, Current Advances in Mechanical Design and Production, Cairo, Feb 2000).

DOI: 10.1016/b978-008043711-8/50034-9

[10] A.I.O. Zaid: Grain Refinement of Aluminum and its Alloys (Proceedings of the Seventh International Symposium on Advanced Materials, Islamabad, Pakistan 2001).

[11] A.I.O. Zaid: Grain Refinement of Zinc Aluminum Alloys Proceeding of the Second International Conference on the Frontiers of Advanced Engineering Materials, Lahore, Pakistan (2006).

[12] S.M.A. Al-Qawabah,  A.I.O. Zaid: Different Methods for Determination of Grain Refinement, International Journal of Science and Engineering Research, IJSER, Vol. 7 (2016), p.1133.

[13] A.A.  Abdel Hamid: Structure Modification of the α-Phase in Zn-Al Cast Alloys by Mcroalloying  Metalkd Vol. 83 (1992), pp.314-318.

DOI: 10.1515/ijmr-1992-830506

[14] A.I.O. Zaid, M.I.J. Hussein: Effect of Zirconium Addition on the Mechanical Behavior and Wear Resistance of Zamak5 Alloy Grain Refined By Titanium (Proceedings of the International Conference on Machine Design and Production, Kusadasi-Turkey, 2006).

[15] A.I.O. Zaid, A. O. Mostafa, Comparison between Mo Addition to Zinc Aluminum Alloy Grain Refined by Ti and Ti-B after Pressing by the Equal Channel Angular Press, ECAP, International Journal of Scientific & Engineering Research, Vol. 7 (2016).

DOI: 10.4028/www.scientific.net/kem.735.29