Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 713, Issue -, Pages 61-66Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2017.12.067
Keywords
Al alloy; Microstructure; Mechanical properties
Categories
Funding
- National Natural Science Foundation of China [51601045]
- Guangxi Bagui Teams for Innovation and Research
- Research Program of Science and Technology of Guangxi [GKAB16380021]
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This study investigated the effects of 0.25% (mass ratio) Sc addition on the microstructure and mechanical properties of 7055 alloy during aging. Sc addition induced a grain boundary effect, which refined the grains of the 7055 alloy. Sc addition also increased the precipitation nucleation efficiency and promoted the uniform precipitation of the eta' phase of 7055 alloy during aging. Compared with pure 7055 alloy, 7055 alloy with Sc exhibited improved hardness, tensile strength, ductility, and thermal stability. This improvement was attributed to the finer size, higher density, more uniformly distributed eta' phase, less eta phase, and finer Al grains of 7055 alloy with Sc compared with those of 7055 alloy without Sc.
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