Hostname: page-component-cd9895bd7-hc48f Total loading time: 0 Render date: 2024-12-27T14:09:01.245Z Has data issue: false hasContentIssue false
  • English
  • Français

Residual Stress Measurements in Continuous Fiber Titanium Matrix Composites

Published online by Cambridge University Press:  06 March 2019

M. R. James ,
M. A. Bourke ,
J. A. Goldstone  and
A. C. Lawson
M. R. James
Affiliation:
Rockwell International Science Center, Thousand Oaks, CA 91360
M. A. Bourke
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545
J. A. Goldstone
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545
A. C. Lawson
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545
Get access

Abstract

Metal matrix composites develop residual strains after consolidation due to the thermal expansion mismatch between the reinforcement fiber and the matrix. X-ray and neutron diffraction measured values for the longitudinal residual stress in the matrix of three titanium MMCs are reported. For thick composites (> 6 plies) the surface stress measured by x-ray diffraction matches that determined by neutron diffraction and therefore represents the stress in the bulk region consisting of the fibers and matrix. For thin sheet composites, the surface values are lower than in the interior and increase as the outer rows of fibers are approached. While a rationale for this behavior has yet to be developed, accounting for composite thickness is important when using x-ray measured values to validate analytic and finite element calculations of the residual stress state.

Type
IX. Stress and Strain Determination by Diffraction Methods, Peak Broadening Analysis
Information
Advances in X-Ray Analysis , Volume 36: Forty-First Annual Conference on Applications of X-ray Analysis, August 3-7, 1992 , 1992 , pp. 481 - 488
Copyright
Copyright © International Centre for Diffraction Data 1992

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Cohen, J. B., The Measurement of Residual Stresses in Composites, Powder Diffraction. 1: 15-21(1986).Google Scholar
2. James, M. R., Residual Stresses in Metal Matrix Composites, International Conference on Residual Stresses II, eds. G. Beck, S. Denis and A. Simon, Elsevier, pp. 429-35(1989).Google Scholar
3. Cox, B. N., James, M. R., Marshall, D. B. and Addison, R. C., Determination of Residual Stresses in Thin Sheet Titanium Aluminide Composites, Metal. Trans. A. 21A:2701–2707(1990).Google Scholar
4. James, M.R, Behavior of Residual Stresses During Fatigue of Metal Matrix Composites, Residual Stresses-3, ed. H. Fujiwara, T. Abe and K. Tanaka, Elsevier, pp. 556–560(1992).Google Scholar
5. Povirk, G. L., Stout, M. G., Bourke, M., Goldstone, J. A., Lawson, A. C., Lovato, M., MacEwen, S. R., Nutt, S. R. and Needlemann, A., Mechanically Induced Residual Stresses in Al/SiC Composites, Scripta Met., 25: 1883–1888(1991).Google Scholar
6. Majumdar, S., Singh, J. P., Kupperman, D. and Krawitz, A.D., Application of Neutron Diffraction to Measure Residual Strains in Various Engineering Composite Materials, J. Enpf, Mat, and Tech., 113: 51–59(1991).Google Scholar
7. Kupperman, D.S., Majumdar, S., Singh, J. P., Residual Strain in Advanced Composites, Neutrons News. 2: 15–18(1991).Google Scholar
8. Allen, A. J., Bourke, M. A. M., Dawes, S., Hutchings, M. T., and Withers, P. J., The Analysis of Internal Strains Measured by Neutron Diffraction in Al- SiC Metal Matrix Composites, Acta. Metall. & Mater., 40: 2361–73(1992).Google Scholar
9. Saigal, A., Kupperman, D. S., and Majumdar, S., Residual Strains in Titanium-Matrix Composites, Mater. Sci. and Engng,. A150: 59–66(1992).Google Scholar
10. Brown, K. M., Hendricks, R. and Brewer, W. D., X-Ray Diffraction Measurements of Residual Stresses in SiC Reinforced Titanium Composites, in Fundamental Relationships Between Microstructure and Mechanical Properties of MMCs, ed. M.N. Gungor and P.K. Liaw, TMS, pp. 269-86(1990).Google Scholar
11. Jayaraman, N. and Rangaswamy, P., Residual Stresses in T13AI-SCS6 Fiber Reinforced Metal Matrix Composites, in Proceedings from Titanium Aluminide Composite Workshop, eds. P.R. Smith, S.J. Balsone and T. Nicholas, WL-TR-91-4020, Materials Behavior Branch, Wright Laboratory, WPAFB, pp, 522-31(1991).Google Scholar