Abstract
Creating metal‐ceramic composites by plastic deformation driven by compression is the most versatile method as it can nearly preserve the microstructure of the metal phase and a variety of reinforcements and morphologies can be used. The great limitation of this process is that very high pressures are needed for effective consolidation (usually about 3 times the flow stress of the metal phase). If, however, plastic deformation can be developed by some other renewable and repeatable means, a relatively small global and external pressure can drive the material to a fully‐consolidated state. Phase transformations, thermal expansion mismatch and the volumetric changes produced by a remote pressure can drive local deviatoric stresses in the vicinity of the particles that provide plastic deformation and if these strains are renewed a small remote external pressure can be used to consolidate the composite. This paper shows that pressure cycling of heterogeneous composites with a compressibility mismatch is a particularly simple and effective way to develop composites of high density in the solid state.
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Daehn, G.S. (2015). Plastic Consolidation of Metal Matrix Composites by Pressure Cycling. In: Tekkaya, A., Homberg, W., Brosius, A. (eds) 60 Excellent Inventions in Metal Forming. Springer Vieweg, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-46312-3_64
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DOI: https://doi.org/10.1007/978-3-662-46312-3_64
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