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논문 기본 정보

자료유형
학술저널
저자정보
Ruiming Su (Shenyang University of Technology) Siyi Ma (Shenyang University of Technology) Kaining Wang (Shenyang University of Technology) Guanglong Li (Shenyang University of Technology) Yingdong Qu (Shenyang University of Technology) Rongde Li (Shenyang University of Technology)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.28 No.4
발행연도
2022.4
수록면
862 - 870 (9page)
DOI
10.1007/s12540-021-00975-y

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The cyclic deep cryogenic treatment was proposed to improve both the hardness and corrosion resistance of the high strength7075 aluminum alloy. The effect of different CDCT times on the exfoliation corrosion and intergranular corrosion of the alloyswere observed by scanning electron microscope. The corrosion behaviors of the alloys were monitored by electrochemicaltechniques. The hardness of the alloy was measured by Vickers hardness tester. Furthermore, the microstructures of thealloys were examined by transmission electron microscope. The results show that the corrosion resistance and hardness arestrongly affected by the precipitate state. The discontinuous grain boundary precipitates and the wide precipitate free zoneswill enhance the corrosion resistance. The fine precipitates distributed evenly in the matrix can increase the hardness. Afterthe CDCT, the corrosion resistance is remarkably improved without sacrificing the hardness. The best combination of thehardness and corrosion resistance is exhibited for the alloy treated with the CDCT twice.

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