Microstructure and corrosion behavior of 2A12 aluminum alloys by high frequency impacting and rooling

This paper investigated the influence of high frequency impacting and rooling (HFIR) treatment on the microstructure, average microstrain, dislocation density, nanomicrohardness, tensile strength and corrosion behavior of 2A12 aluminum alloy. A SPD layer was successfully generated. With the static p...

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Bibliographic Details
Published inCIRP journal of manufacturing science and technology Vol. 41; pp. 328 - 337
Main Authors Zhang, Huijing, Guo, Baosong, Zhao, Xiaohui, Chen, Chao
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.04.2023
Subjects
2A12 aluminum alloy
Corrosion behavior
High frequency impacting and rolling
Microstructure
High frequency impacting and rolling
Microstructure
Corrosion behavior
2A12 aluminum alloy
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Summary:This paper investigated the influence of high frequency impacting and rooling (HFIR) treatment on the microstructure, average microstrain, dislocation density, nanomicrohardness, tensile strength and corrosion behavior of 2A12 aluminum alloy. A SPD layer was successfully generated. With the static pressure increased, the average grain size of top surface decreased. There is increase in nanomicrohardness, elastic modulus and tensile strength with increase of static pressure. 2A12 aluminum alloy treated by 500 N static pressure exhibited best corrosion resistance among all the samples, including the HFIR-free one. Factors such as small grain size, compressive residual stress, low surface roughness, and formation of dense passive film played a vital role in improving the corrosion resistance.
ISSN:1755-5817
1878-0016
DOI:10.1016/j.cirpj.2023.01.001