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Synthesis and spark plasma sintering of Al-Mg-Zr alloys

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Abstract

Although casting is commonly used to process aluminum alloys, powder metallurgy remains a promising technique to develop aluminum based materials for structural and functional applications. The possibility to synthesize Al-Mg-Zr alloys through mechanical alloying and spark plasma sintering techniques was explored. Al-10Mg-5Zr and Al-5Mg-1Zr alloyed powders were synthesized through wet ball milling the appropriate amount of elemental powders. The dried milled powders were spark plasma sintered through passing constant pulsed electric current with fixed pulse duration at a pressure of 35 MPa. The samples were vacuum sintered at 450, 500, 550, 600 and 620 °C for 10, 15 and 20 min. The Al-10Mg-5Zr alloy displays poor densification at lower sintering temperatures of 450, 500, 550 and 600 °C. Its sinterability is improved at a temperature of 620 °C whereas sintering temperatures higher than 620 °C leads to partial melting of the alloy. It is possible to sinter the Al-5Mg-1Zr alloy at 450, 500 and 550 °C. The increase of sintering temperature improves its densification and increases its hardness. The Al-5Mg-1Zr alloy displays better densification and hardness compared to Al-10Mg-5Zr alloys.

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Correspondence to N. Saheb.

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Foundation item: Project(ARP-28-122) supported by King Abdul Aziz City for Science and Technology (KAC ST) of Kingdom of Saudi Arabia

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Saheb, N., Hakeem, A.S., Khalil, A. et al. Synthesis and spark plasma sintering of Al-Mg-Zr alloys. J. Cent. South Univ. 20, 7–14 (2013). https://doi.org/10.1007/s11771-013-1452-8

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  • DOI: https://doi.org/10.1007/s11771-013-1452-8

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