Roller Burnishing of Particle Reinforced Aluminium Matrix Composites
Professorship Micromanufacturing Technology, Chemnitz University of Technology, Reichenhainer Str. 70, 09126 Chemnitz, Germany
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Metals 2018, 8(2), 95; https://doi.org/10.3390/met8020095
Received: 15 December 2017 / Revised: 17 January 2018 / Accepted: 22 January 2018 / Published: 27 January 2018
(This article belongs to the Special Issue Scientific and Engineering Progress on Aluminum-Based Light-Weight Materials: Research Reports from the German Collaborative Research Center 692)
Energy and resource efficient systems often demand the use of light-weight materials with a specific combination of properties. However, these requirements usually cannot be achieved with homogeneous materials. Consequently, composites enabling tailored properties gain more and more importance. A special kind of these materials is aluminium matrix composites (AMCs), which offer elevated strength and wear resistance in comparison to the matrix alloy. However, machining of these materials involves high tool wear and surface imperfections. An approach to producing high-quality surfaces consists in roller burnishing of AMCs. Furthermore, such forming technologies allow for the generation of strong compressive residual stresses. The investigations address the surface properties in the roller burnishing of AMCs by applying different contact forces and feeds. For the experiments, specimens of the alloy AA2124 reinforced with 25% volume proportion of SiC particles are used. Because of the high hardness of the ceramic particles, roller bodies were manufactured from cemented carbide. The results show that roller burnishing enables the generation of smooth surfaces with strong compressive residual stresses in the matrix alloy. The lowest surface roughness values are achieved with the smallest feed (0.05 mm) and the highest contact force (750 N) tested. Such surfaces are supposed to be beneficial for components exposed to dynamic loads.
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Keywords:
aluminium; aluminium matrix composite; burnishing; finishing; forming; metal forming; metal matrix composite; residual stress; roller burnishing; surface integrity
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MDPI and ACS Style
Nestler, A.; Schubert, A. Roller Burnishing of Particle Reinforced Aluminium Matrix Composites. Metals 2018, 8, 95. https://doi.org/10.3390/met8020095
AMA Style
Nestler A, Schubert A. Roller Burnishing of Particle Reinforced Aluminium Matrix Composites. Metals. 2018; 8(2):95. https://doi.org/10.3390/met8020095
Chicago/Turabian StyleNestler, Andreas, and Andreas Schubert. 2018. "Roller Burnishing of Particle Reinforced Aluminium Matrix Composites" Metals 8, no. 2: 95. https://doi.org/10.3390/met8020095
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