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- Title
Cu-Cr-Si 合金时效强化机理及析出动力学研究.
- Authors
杜宜博; 周延军; 宋克兴; 郭慧稳; 刘爱奎
- Abstract
To explore the regulation mechanism of Si on the precipitates of Cu-Cr alloy, the aging strengthening mechanism and precipitation kinetics of Cu-Cr-Si alloy were studied in this paper. The microstructure, electrical conductivity and mechanical properties of the alloy were detected by transmission electron microscope, electrical conductivity tester and electronic tensile testing machine, respectively. The results show that the electrical conductivity of the alloy increases sharply with the aging time. The electrical conductivity at the peak aging is as high as 92. 5%IACS, and the yield strength is 193 MPa. The precipitated phases of the peak-aged Cu-Cr-Si alloy consist of the fcc Cr-rich phase and the ordered bcc Cr-rich phase, and the strengthening mechanisms are dislocation shearing and dislocation bypassing mechanisms, respectively. Both precipitates synergistically hinder dislocation slip. The Cr-rich precipitation transformation ratio of the Cu-Cr-Si alloy with different aging times is calculated, the aging precipitation kinetic equation and conductivity equation of Cu-Cr-Si alloy for constant temperature are established, and the isothermal phase transition kinetics for S-shaped curve are drawn.
- Subjects
PRECIPITATION (Chemistry) kinetics; PHASE transitions; ELECTRIC conductivity; TRANSMISSION electron microscopes; MECHANICAL alloying
- Publication
Journal of Henan University of Science & Technology, Natural Science, 2022, Vol 43, Issue 6, p1
- ISSN
1672-6871
- Publication type
Article
- DOI
10.15926/j.cnki.issn1672-6871.2022.06.001