Work

Synergistic effect of Er and Si on corrosion resistance of peak-aged AlZnMgCu alloy

Year: 2025

Type: article

Abstract: The corrosion resistance and mechanical properties of peak-aged AlZnMgCu alloys containing Si and Er elements were investigated with hardness test, tensile test, intergranular corrosion test, exfoliation corrosion test and transmission electron microscopy. The results indicate that peak-aged AlZnMgCuSiEr alloy is strengthened by co-precipitation of η′ phases and nano-sized GPB-II zones. The yield strength of the AlZnMgCu alloy is increased by 38.5 MPa and the elongation is increased by 4.5%. At the same time, the corrosion resistance of the AlZnMgCuSiEr alloy is enhanced due to the synergistic effect of Er and Si. The maximum intergranular corrosion (IGC) depth decreases from 264.2 to 9.9 μm. The fundamental reason is that the co-addition of Si and Er regulates the evolution of precipitated phases in grains and at grain boundaries.

Source: Transactions of Nonferrous Metals Society of China

Authors: Shang-shang LIANG, Sheng-ping WEN, Ke-hong GUO, Bao-sheng LIU, Yong HU, Wu WEI, Xiao-lan WU, Hui HUANG, Kun-yuan GAO, Xiang-yuan XIONG, Zuo-ren NIE

Institutions: Beijing University of Technology, Taiyuan University of Science and Technology

Language: English

Topic: Aluminum Alloy Microstructure Properties

Subfield: Aerospace Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: diamond

Funders: University of Science and Technology of China, National Key Research and Development Program of China

Awards: G1814130958, G205211851, G528012815, G8447100429

OpenAlex ID: W4415634694

FWCI: 1.199

Cites: 28

Cited by: 3

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