Fabrication of metal-matrix composites by hot-triaxial-compaction of foil/fiber/foil lay-ups
Hot triaxial compaction was used to consolidate Ti-6Al-4V matrix, SCS-6 silicon carbide fiber composites in order to examine the effect of stress state on the densification process. In order to compensate for local density variations, the residual porosity was expressed as the total pore area normal...
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| Veröffentlicht in: | Scripta materialia 1998-09, Vol.39 (8), p.1077-1082 |
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| container_title | Scripta materialia |
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| creator | Nicolaou, P.D. Piehler, H.R. |
| description | Hot triaxial compaction was used to consolidate Ti-6Al-4V matrix, SCS-6 silicon carbide fiber composites in order to examine the effect of stress state on the densification process. In order to compensate for local density variations, the residual porosity was expressed as the total pore area normalized by the total number of fibers. It was found that the applied stress state influences the consolidation behavior. Specifically, for fixed temperature, time, fiber spacing, and vertical principal stress the densification rate increases as the added axial stress is increased in comparison to the hydrostatic pressure. This observation was attributed to the increase of the effective stress over the mean stress, and the decreased transverse constraint on the composite which allows easier lateral fiber movement and small increases of the fiber spacing. |
| doi_str_mv | 10.1016/S1359-6462(98)00287-5 |
| format | Article |
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In order to compensate for local density variations, the residual porosity was expressed as the total pore area normalized by the total number of fibers. It was found that the applied stress state influences the consolidation behavior. Specifically, for fixed temperature, time, fiber spacing, and vertical principal stress the densification rate increases as the added axial stress is increased in comparison to the hydrostatic pressure. This observation was attributed to the increase of the effective stress over the mean stress, and the decreased transverse constraint on the composite which allows easier lateral fiber movement and small increases of the fiber spacing.</description><subject>Applied sciences</subject><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>Dispersion-, fiber-, and platelet-reinforced metal-based composites</subject><subject>Exact sciences and technology</subject><subject>Materials science</subject><subject>Metals. 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| language | eng |
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| source | Access via ScienceDirect (Elsevier) |
| subjects | Applied sciences Cross-disciplinary physics: materials science rheology Dispersion-, fiber-, and platelet-reinforced metal-based composites Exact sciences and technology Materials science Metals. Metallurgy Other materials Physics Specific materials |
| title | Fabrication of metal-matrix composites by hot-triaxial-compaction of foil/fiber/foil lay-ups |
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