期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 900, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.163488
关键词
High-energy ball milling; Aluminum alloys; Nanocrystalline alloys; Age hardening; Pitting corrosion
资金
- National Science Foundation [NSF-CMMI 1760204]
- Scientific and Technological Research Council of Turkey [TUBITAK-BIDEB 2214-A]
High energy-ball milling (HEBM) has significant influence on corrosion and hardness of age hardening aluminum alloys, leading to improved corrosion resistance and hardness in the alloys. Nanocrystalline structure, extended solid solubility, and homogenous microstructure are key factors for the superior performance of age hardening ball milled alloys.
ABSTR A C T The influence of high energy-ball milling (HEBM) on corrosion and hardness of age hardening aluminum alloys was investigated. Nanocrystalline age hardening (AA2024, AA6061 and AA7075) alloys were pro-duced by HEBM of pre-alloyed powder and subsequent cold compaction under uniaxial pressure of 3 GPa. Cyclic potentiodynamic polarization and immersion tests were conducted in 0.6 M NaCl solution which revealed significantly increased pitting and protection potentials in the HEBM alloys compared to wrought alloys of same composition. X-ray diffraction analysis and transmission electron microscopy indicated grain refinement below 100 nm in the ball milled alloys which was the major strengthening mechanism in the age hardening HEBM alloys. The superior corrosion resistance and hardness of the age hardening ball milled alloys were attributed to nanocrystalline structure, extended solid solubility and homogenous microstructure-free from coarse intermetallic phases. (c) 2021 Elsevier B.V. All rights reserved.
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