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    Effect of temperature and pressure on mechanical, surface and electrochemical properties of Al-1.5Cu-5.5Zn-2.5Mg (Alumix-431)

    Year: 2018

    Journal: Anti-Corros. Methods Mater., Volume 65, page 558–571

    Authors: Acar, Ayse Nur; Mutlu, Rasiha Nefise; Eksi, Abdul Kadir; Ekicibil, Ahmet; Yazici, Birgul

    Organizations: Research Funds of Cukurova University, Adana, Turkey [FBA-2016-5249, FDK-2015-5386]

    Keywords: Corrosion

    Purpose The purpose of this paper is to examine new alloys created from Alumix 431 powder and investigate their mechanical and electrochemical properties. Design/methodology/approach In this study; Alumix-431 alloy samples were prepared using the powder metallurgy (P/M) method applying cold (RT) and warm (50 degrees C and 80 degrees C) compaction methods under pressures of 200 and 250 MPa and were sintered at 600 degrees C in N-2(g) atmosphere. Hardness and density of the samples were measured, and corrosion properties were determined by electrochemical impedance spectroscopy charting polarization curves. Surface characterization was determined by contact angle, scanning electron microscopy/mapping, energy dispersive X-ray spectrometry and X-ray diffractometry images. Findings Alumix-431 alloys obtained upon compaction at 250 MPa/50 degrees C had the highest mechanical properties and corrosion resistance and good surface properties. On the surfaces of Alumix-431 alloys, -Al, MgZn2, Al-2,CuMg, Al-2,O-3, Al2MgO4 phases were recorded. Originality/value This study aimed to construct a correlation between mechanical and electrochemical properties of the newly created alloys (prepared under special conditions).
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