期刊
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
卷 527, 期 29-30, 页码 7821-7825出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2010.08.070
关键词
Aluminum alloys; Mechanical alloying; Nanostructured materials; Hot pressing; Hall-Petch relation
类别
资金
- Deutscher Akademischer Austausch Dienst (DAAD) foundation, Germany
Mechanical properties of bulk nanocrystalline Al-4Cu alloys with grain sizes from 47 to 105 nm, synthesized by mechanically alloying followed by vacuum hot pressing at different temperatures, were analysed through Hall-Petch relation. Hall-Petch analysis revealed a high frictional stress (170 MPa) and a high positive slope (0.13 MPa root m) as compared to pure Al, which has a frictional stress (15-30 MPa) and a slope (0.06-0.09 MPa root m). From a detailed evaluation of different strengthening mechanisms it is inferred that the Al(2)Cu precipitates and oxide particles are the likely reason for such high values of frictional stress and slope. (C) 2010 Elsevier B.V. All rights reserved.
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