Hot Extrusion of a Commercial Aluminum Powder Metallurgy Metal Matrix Composite Material
| Autor: | G.A. Sweet, L. J. B. Smith, Taylor Alan C, M. F. Wilson, Ian W. Donaldson, Bruce W. Williams, Donald Paul Bishop, R.L. Hexemer, M. Y. Amegadzie |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Polymers and Plastics Metal matrix composite Metals and Alloys chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 020303 mechanical engineering & transports 0203 mechanical engineering chemistry Mechanics of Materials Aluminium Powder metallurgy Ultimate tensile strength Ceramics and Composites Extrusion Fiber Texture (crystalline) Composite material 0210 nano-technology |
| Zdroj: | Materials Performance and Characterization. 9:20190161 |
| ISSN: | 2379-1365 |
| Popis: | Sintered preforms made of an aluminum powder metallurgy (PM) 2000 series metal matrix composite designed for press-and-sinter applications were forward extruded at 450°C under displacement rates of 254 mm/min and 2,032 mm/min. The material was highly responsive to extrusion under these conditions and was readily formed into products that included 10-mm and 15-mm solid round bars as well as C-channel and round tubing profiles, wherein extrusion ratios ranged from 11:1 to 76:1. Significant metallurgical improvements were also observed in the seemingly defect-free products. These included gains in tensile yield strength (10 %), ultimate tensile strength (20 %), and tensile ductility (400 %) when compared to the nonextruded T6 counterpart. Such enhancements were attributed to the attenuation of full theoretical density, disruption of the residual oxide network, and the development of a partial duplex fiber texture with strong and moderate fiber components within the extruded PM products. |
| Databáze: | OpenAIRE |
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