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Open AccessArticle

Double Reinforcement of Al–Fe Intermetallic Composites Fabricated by Friction Stir Processing

National Defense Key Discipline Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang 330063, China
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Metals 2019, 9(9), 1002; https://doi.org/10.3390/met9091002
Received: 21 August 2019 / Revised: 9 September 2019 / Accepted: 11 September 2019 / Published: 12 September 2019
A double reinforced layer on an aluminum alloy surface was produced using friction stir processing (FSP) by adding 34CrNiMo6 powder into Al (AA2024) substrate for better wear resistance and gradient transitions. The microstructures of the composites were analyzed using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The phase composition was examined by X-ray diffraction (XRD). The results show that the double reinforced layer of the Al13Fe4 intermetallic compound could be successfully fabricated via FSP. The volume fraction of Al13Fe4 in the double reinforced layer was higher than in the single reinforced layer due to adding 34CrNiMo6 powder and reinforced twice, and the Al13Fe4 particles were dispersed more homogeneously in the double reinforced layer. The interfaces between the double and single reinforced layer had a good metallurgical bond. The microhardness of the double reinforcement layer was significantly increased. Compared with the AA2024 substrate, the microhardness of the double and single reinforced layers increased five- (576 HV) and two-fold (254 HV), respectively. View Full-Text
Keywords: friction stir processing; double reinforcement; Al–Fe intermetallic compounds friction stir processing; double reinforcement; Al–Fe intermetallic compounds
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Huang, C.; Xia, Y.; Xia, C.; Liu, F. Double Reinforcement of Al–Fe Intermetallic Composites Fabricated by Friction Stir Processing. Metals 2019, 9, 1002.

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