Improving mechanical and corrosion behavior of 5052 aluminum alloy processed by cyclic extrusion compression
File(s)metals-12-01288-v2.pdf (6.35 MB)
Published version
Author(s)
Wu, J
Djavanroodi, F
Shamsborham, M
Attarilar, S
Ebrahimi, M
Type
Journal Article
Abstract
Background The severe plastic deformation approach and its well-known cyclic extrusion compression (CEC) method have been established as a powerful tool for fabricating bulk ultrafine-grained metals and alloys with improved properties. Objective This study focused on the microstructure evolution, hardness behavior, and corrosion properties of the CEC-processed Al5052 up to four passes compared to the initial annealed state. Methods The initial and CEC-processed Al5052 samples at different pass numbers were examined experimentally by EBSD analyses, hardness measurements, and corrosion resistance. Results Substantial grain refinement was attained from ~23 μm for the annealed sample to ~0.8 μm in the four passes sample. In addition, the hardness values considerably increased up to 75.7% after four passes from the initial value of 80 HV. In addition, the increment of pass numbers led to a more uniform dispersion of hardness values. Furthermore, the production of more stable protective oxide layers on the UFG structure of the CEC-processed sample led to the improvement in electrochemical response with a corrosion rate reduction from 1.49 to 1.02 mpy, respectively, in the annealed and final pass CEC-processed samples. In fact, the annealed sample manifested more large-sized and deeper pits than the CECed samples due to the increment of potential values and electrochemical attack of chlorine ions that finally deteriorates the corrosion performance. Conclusions CEC is an efficient method to improve the mechanical properties of materials due to substantial microstructural changes along with enhancement of electrochemical behavior because of the presence of small-sized and shallow pits.
Date Issued
2022-07-30
Date Acceptance
2022-07-28
ISSN
2075-4701
Publisher
MDPI AG
Journal / Book Title
Metals
Volume
12
Issue
8
Copyright Statement
© 2022 by the authors.
Submitted for possible open access
publication under the terms and
conditions of the Creative Commons
Attribution (CC BY) license
(https://creativecommons.org/licenses/by/4.0/)
Submitted for possible open access
publication under the terms and
conditions of the Creative Commons
Attribution (CC BY) license
(https://creativecommons.org/licenses/by/4.0/)
Subjects
Science & Technology
Technology
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
Materials Science
severe plastic deformation
Al5052
microstructure refinement
hardness behavior
electrochemical measurement
SEVERE PLASTIC-DEFORMATION
DYNAMIC RECRYSTALLIZATION
SURFACE-ROUGHNESS
GRAIN-REFINEMENT
PURE COPPER
MICROSTRUCTURE
EVOLUTION
RESISTANCE
CEC
0914 Resources Engineering and Extractive Metallurgy
Publication Status
Published
Article Number
ARTN 1288