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Effect of Cooling-Assisted Friction Stir Processing on Corrosion Behavior of AA5083 Alloy
The current investigation focuses on the effect of cooling technology on the corrosion behavior of friction stir processing (FSP) of AA5083 alloy. After processing, the equiaxed refined grains were created in all the specimens, and the specimen processed in water led to more grain refinement than other specimens. Three types of intermetallics (IMs), such as iron-based needle IMs, Mg-based round IMs, and small Mg-based IMs at grain boundaries, were identified in both base metal and FSPed specimens. After FSP, these IMs fragmented into small particles and dispersed homogeneously in the aluminum matrix. Moreover, the heat generated between the work and tool junction caused the coarsening, reformation, and dissolution of IMs based on the availability of heat input. Four types of corrosion tests were carried out: immersion test, open circuit potential test, Tafel polarization test, and electrical impedance spectroscopy test to analyze the electrochemical behavior of FSPed specimens. All the corrosion findings stated that the corrosion resistance improved after the processing due to the formation of uniform grain structure, less density of iron-based IMs, and discontinuous IMs. Within FSPed specimens, the specimen processed in water led to greater corrosion resistance than other specimens owing to better grain refinement and small IMs.
Effect of Cooling-Assisted Friction Stir Processing on Corrosion Behavior of AA5083 Alloy
The current investigation focuses on the effect of cooling technology on the corrosion behavior of friction stir processing (FSP) of AA5083 alloy. After processing, the equiaxed refined grains were created in all the specimens, and the specimen processed in water led to more grain refinement than other specimens. Three types of intermetallics (IMs), such as iron-based needle IMs, Mg-based round IMs, and small Mg-based IMs at grain boundaries, were identified in both base metal and FSPed specimens. After FSP, these IMs fragmented into small particles and dispersed homogeneously in the aluminum matrix. Moreover, the heat generated between the work and tool junction caused the coarsening, reformation, and dissolution of IMs based on the availability of heat input. Four types of corrosion tests were carried out: immersion test, open circuit potential test, Tafel polarization test, and electrical impedance spectroscopy test to analyze the electrochemical behavior of FSPed specimens. All the corrosion findings stated that the corrosion resistance improved after the processing due to the formation of uniform grain structure, less density of iron-based IMs, and discontinuous IMs. Within FSPed specimens, the specimen processed in water led to greater corrosion resistance than other specimens owing to better grain refinement and small IMs.
Effect of Cooling-Assisted Friction Stir Processing on Corrosion Behavior of AA5083 Alloy
J. Inst. Eng. India Ser. D
Keerthana, B. V. S. (Autor:in) / Satyanarayana, M. V. N. V. (Autor:in) / Shankar, M. N. S. (Autor:in)
Journal of The Institution of Engineers (India): Series D ; 105 ; 191-200
01.04.2024
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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