A binary Al-Zn and five ternary Al-Zn-Cu alloys were produced using stir casting process by varying the Cu contents from 0-5 wt. % and keeping Al content as constant value of 60 wt. %. It was found that the micro-hardness and the ultimate tensile strength of the alloys increases significantly with increasing Cu content up to 2 wt. % which is due to solid solution hardening of Cu content in Al-Zn alloy. Further increase of Cu content results in the formation of hard and brittle θ phase which weakens the inter-dendrite region and marginally increases the hardness and ultimate tensile strength of the alloy. The percentage elongation of the alloy system decreases continuously with addition of Cu content. © Research India Publications.
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K. K. Suresh, Dr. Ilangovan S., Dr. Sanjivi Arul, and Shanmugasundaram A., “Effect of zn/cu content on microstructure and mechanical properties of al-zn-cu cast alloys”, International Journal of Applied Engineering Research, vol. 10, pp. 9325-9333, 2015.