Corrosion behavior of AA5083 produced by high-energy ball milling

JOURNAL OF ALLOYS AND COMPOUNDS

卷:857

Article

Esteves, L.¹  Witharamage, C. S.^1,2  Christudasjustus, J.^1,2  Walunj, G.³  O'Brien, S. P.^1,2  Ryu, S.¹  Borkar, T.³  Akans, R. E.⁴  Gupta, R. K.^1,2 

[1] Univ Akron, Dept Chem Biomol Engn & Corros Engn, Akron, OH 44325 USA

[2] North Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27606 USA

[3] Cleveland State Univ, Dept Mech Engn, Cleveland, OH 44115 USA

[4] Concurrent Technol Corp, 100 CTC Dr, Johnstown, PA 15904 USA

关键词: Nanocrystalline alloys;    High-energy ball milling;    Spark plasma sintering (SPS);    Aluminum-magnesium alloys;    Pitting corrosion;   

DOI  :  10.1016/j.jallcom.2020.158268

来源: Elsevier

【 摘 要 】

The corrosion, microstructure, and hardness of nanocrystalline AA5083 were compared to that of conventional AA5083-H116 and consolidated gas atomized powder. The nanocrystalline AA5083 was produced by consolidating high-energy ball milled gas atomized powder with two methods: cold compaction and spark plasma sintering. Electrochemical impedance spectroscopy, cyclic potentiodynamic polarization, Mott-Schottky analysis, and immersion tests followed by surface analysis were used to evaluate the corrosion behavior in 0.6 M NaCl solution. Pitting corrosion resistance of the nanocrystalline AA5083 was superior to that of commercial AA5083-H116. The improved corrosion resistance was primarily attributed to the homogenous microstructure and significant grain refinement below 100 nm. (C) 2020 Elsevier B.V. All rights reserved.

【 授权许可】

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