Analysis of neutron diffraction peak broadening caused by internal stresses in composite materials
- Univ. of Oxford (United Kingdom). Dept. of Materials
- Los Alamos National Lab., NM (United States)
Neutron diffraction is an essential tool in the study of internal stresses in composite materials. In most work only the peak shifts caused by the related elastic strains are considered, but other valuable information exists in the form of peak shape changes. The conditions under which the pure diffraction profile of the composite (i.e. the profile when all sources of broadening not caused by the residual stresses are removed) represents the probability distribution of the peak shifts corresponding to the strains are examined. It is shown that in these conditions, the pure diffraction profile has no attributes of particle size broadening (and vice versa), thereby providing a test for the validity of results interpreted in this way. The experimental derivation of measured strain distributions in Al{sub 2}O{sub 3}/SiCp composites using neutron diffraction is described. No apparent particle size broadening was detected, demonstrating the validity of the results, which also satisfied other tests for consistency.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 10162916
- Report Number(s):
- LA-UR-94-1891; CONF-9404181-1; ON: DE94014453; TRN: 94:013642
- Resource Relation:
- Conference: Workshop on neutron scattering data analysis,Isis (United Kingdom),Apr 1994; Other Information: PBD: [1994]
- Country of Publication:
- United States
- Language:
- English
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