The influence of thermal-mechanical processing on residual stresses in titanium matrix composites

The effects of three distinct thermo-mechanical processes on the residual stress state in a uni-directionally reinforced SCS-6/Ti-6-2-4-2[0]6 titanium-alloy matrix composite were predicted using a finite element model. For comparison the residual stresses were measured using X-ray and neutron diffra...

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Bibliographic Details
Published inMaterials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 224; no. 1-2; pp. 200 - 209
Main Authors Rangaswamy, P., Bourke, M.A.M., Wright, P.K., Jayaraman, N., Kartzmark, E., Roberts, J.A.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 31.03.1997
Elsevier
Subjects
Applied sciences
Cross-disciplinary physics: materials science; rheology
Dispersion-, fiber-, and platelet-reinforced metal-based composites
Exact sciences and technology
Materials science
Materials synthesis; materials processing
Metals. Metallurgy
Physics
Residual stress
Thermal-mechanical processing
Titanium matrix composites
Thermal-mechanical processing
Residual stress
Titanium matrix composites
Validation
Stress analysis
Fibre reinforced metal
Neutron diffraction
Theoretical study
Mechanical properties
Silicon carbides
Residual stresses
XRD
Experimental study
Titanium base alloys
Finite element method
Composite materials
Numerical simulation
Thermomechanical treatments
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Summary:The effects of three distinct thermo-mechanical processes on the residual stress state in a uni-directionally reinforced SCS-6/Ti-6-2-4-2[0]6 titanium-alloy matrix composite were predicted using a finite element model. For comparison the residual stresses were measured using X-ray and neutron diffraction. Reductions in stress were predicted by the models and both experimental techniques recorded a reduction compared to the as-fabricated material. While the numerically predicted trends qualitatively agreed with the neutron measurements quantitative agreement was not achieved. In the longitudinal direction the neutron results showed closer agreement to the calcualtion whereas in the transverse direction the X-ray results did. Nevertheless the changes did correlate with improvement in fatigue lifetimes.
ISSN:0921-5093
1873-4936
DOI:10.1016/S0921-5093(96)10517-7