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Effects of microstructure evolution on discharge properties of AZ31 alloy as anode for seawater battery
Author(s) -
Xie Qiuyuan,
Ma Aibin,
Jiang Jinghua,
Li Yuhua,
Wang Jiajia,
Wang Lisha,
Klu Edwin Eyram
Publication year - 2020
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.202011598
Subject(s) - materials science , microstructure , anode , alloy , battery (electricity) , magnesium alloy , extrusion , metallurgy , pressing , seawater , refining (metallurgy) , isotropy , grain size , composite material , electrode , power (physics) , chemistry , physics , oceanography , quantum mechanics , geology
In recent years, many researchers have been focusing on improving the discharge properties of AZ31 magnesium alloy for battery applications. In this paper, the equal‐channel angular pressing (ECAP) is used as a preferred way of refining the microstructure to enhance the discharge characteristics of AZ31 alloy as the anode for seawater batteries. The electrochemical discharge behaviors of ECAP‐processed AZ31 alloy are investigated along extrusion surfaces, normal cross‐sections, and transverse cross‐sections and compared with as‐cast and homogenized samples. On the basis of the findings, the anode efficiency is improved effectively through the ECAP method, with approximate isotropy in the discharge behaviors of refined AZ31 alloy. The enhanced discharge performance can be attributed to the refined grains, uniform grain sizes, and dispersed β‐Mg 17 Al 12 after ECAP processing.