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Texture and residual strain in two SiC/Ti-6-2-4-2 titanium composites

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Abstract

Residual strain and texture variations were measured in two titanium matrix composites reinforced with silicon carbide fibers (Ti/SiC) of similar composition but fabricated by different processing routes. Each composite comprised a Ti-6242 α/β matrix alloy containing vol 35 pct continuous SiC fibers. In one, the matrix was produced by a plasma sprayed (PS) route, and in the other by a wiredrawn (WD) process. The PS and WD composites were reinforced with SCS-6 (SiC) and Trimarc (SiC) fibers, respectively. The texture in the titanium matrices differed significantly. The titanium matrix for the PS material exhibited random texture pre and post fabrication of the composite. For the WD material, the starting texture of the monolithic titanium matrix was ≈17 times random, but after consolidation into composite form, it was ≈6 times random. No significant differences were noted in the fiber-induced matrix residual strains between the composites prepared by the two procedures. However, the Trimarc (WD) fibers recorded higher (≈1.3 times) compressive strains than the SCS-6 (PS) fibers. Stresses and stress balance results are reported. Plane-specific elastic moduli, measured in load tests on the unreinforced matrices, showed little difference.

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Authors and Affiliations

  1. the Lujan Center, Los Alamos National Laboratory, 87545, Los Alamos, MN

    P. Rangaswamy, M. A. M. Bourke, R. Von Dreele & K. Bennett

  2. ISIS, Rutherford Appleton Laboratory, OX11 0QX, Chilton, Didcot, Oxon, England

    M. R. Daymond

  3. the Department of Materials Science and Engineering, University of Cincinnati, 45221-0012, Cincinnati, OH

    N. Jayaraman

Authors
  1. P. Rangaswamy
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  2. M. A. M. Bourke
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  3. R. Von Dreele
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  4. K. Bennett
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  5. M. R. Daymond
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  6. N. Jayaraman
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Additional information

This article is based on a presentation made in the Symposium “Mechanisms and Mechanics of Composites Fracture” held October 11–15, 1998, at the TMS Fall Meeting in Rosemont, Illinois, under the auspices of the TMS-SMD/ASM-MSCTS Composite Materials Committee.

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Rangaswamy, P., Bourke, M.A.M., Von Dreele, R. et al. Texture and residual strain in two SiC/Ti-6-2-4-2 titanium composites. Metall Mater Trans A 31, 889–898 (2000). https://doi.org/10.1007/s11661-000-0032-3

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