Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5455620 | Materials Science and Engineering: A | 2017 | 7 Pages |
Abstract
Superplastic deformation of a carbon nanotube reinforced aluminum alloy matrix composite (CNT/6061 Al) fabricated through Flake powder metallurgy (Flake PM) was investigated using uniaxial tensile tests under different temperatures and different strain rates. The result showed that the maximum elongation at 853Â K was 106% at strain rate of 4.17Eâ1Â sâ1, while the maximum elongation at 673Â K was 89% obtained at 4.17Eâ1Â sâ1. Threshold stress was evident at lower temperature but insignificant at higher temperature. Strain rate sensitivity and apparent activation energy was determined to be 0.33 and 87.3Â kJ/mol, respectively, indicating the grain boundary diffusion controlled mechanism was dominant for this material. With the increase of temperature, partial liquid phase appeared and the reaction of CNT was intensified, which indicated the superplastic deformation of CNT/6061 Al should be conducted at lower temperature (673Â K).
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Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Haiyue Huang, Genlian Fan, Zhanqiu Tan, Ding-Bang Xiong, Qiang Guo, Cuiping Guo, Zhiqiang Li, Di Zhang,