Microstructure and compressive properties of in situ synthesized TiC/Ti composites
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W. J. LU
,
Z. F. Yang
Abstract
TiC/Ti composites were produced by nonconsumable arc-melting technology utilizing the self-propagation high-temperature synthesis reaction between Ti and graphite. X-ray diffraction was used to identify the phases in the composite. The microstructures of the composites were observed by optical microscopy and transmission electron microscopy. The results show that there are two phases in the composite: TiC and Ti. Reinforcements are distributed uniformly in the matrix alloy. The interface between reinforcement and Ti alloy is very clean. There are high-density dislocations around the TiC particles due to the difference in coefficient of thermal expansion between TiC and Ti. The mechanical properties of the composites improve significantly due to the incorporation of reinforcement. The addition of Al not only strengthens the matrix alloy by solid-solution strengthening, but also improves the mechanical properties of the composites by refining the reinforcement and matrix alloy. The strengthening mechanisms mainly include the following factors: (a) bearing load by the TiC particles, (b) refinement of the grain size, and (c) intrinsic strengthening of the matrix alloy by high-density dislocations.
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We would like to acknowledge a financial support provided by the National Natural Science Foundation of China under Grant No. 59631080 and the support of the New Materials Research Center of Shanghai.
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© 2002 Carl Hanser Verlag, München
Artikel in diesem Heft
- Frontmatter
- Articles/Aufsätze
- Strain rate dependence of the deformation mechanisms in a fully lamellar γ-TiAl-based alloy
- Experimental and thermodynamic assessment of the Fe –Gd–Zr system
- Phase diagram of the Fe –Co –Ti system at 1073 K
- Copper concentration inside Guinier-Preston I zones formed in an Al –Cu alloy
- Identification of precipitates in 6013 aluminum alloy (Al –Mg –Si –Cu)
- Redistribution of phosphorus and carbon in steel weldments
- Microstructure and compressive properties of in situ synthesized TiC/Ti composites
- Effect of Al on the glass forming ability of Zr–Ni –Cu–Al alloys
- Fcc-hcp transformation-related internal friction in Fe –Mn alloys
- High-temperature stress and strain partitioning in duplex stainless steel
- Load sequence effects in the high cycle fatigue of two ferrite-pearlite microalloyed steels
- Characterization of intermetallic compounds formed during the interfacial reactions of liquid Sn and Sn– 58Bi solders with Ni substrates
- Notifications/Mitteilungen
- Personal/Personelles
Artikel in diesem Heft
- Frontmatter
- Articles/Aufsätze
- Strain rate dependence of the deformation mechanisms in a fully lamellar γ-TiAl-based alloy
- Experimental and thermodynamic assessment of the Fe –Gd–Zr system
- Phase diagram of the Fe –Co –Ti system at 1073 K
- Copper concentration inside Guinier-Preston I zones formed in an Al –Cu alloy
- Identification of precipitates in 6013 aluminum alloy (Al –Mg –Si –Cu)
- Redistribution of phosphorus and carbon in steel weldments
- Microstructure and compressive properties of in situ synthesized TiC/Ti composites
- Effect of Al on the glass forming ability of Zr–Ni –Cu–Al alloys
- Fcc-hcp transformation-related internal friction in Fe –Mn alloys
- High-temperature stress and strain partitioning in duplex stainless steel
- Load sequence effects in the high cycle fatigue of two ferrite-pearlite microalloyed steels
- Characterization of intermetallic compounds formed during the interfacial reactions of liquid Sn and Sn– 58Bi solders with Ni substrates
- Notifications/Mitteilungen
- Personal/Personelles
