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Volumn 84, Issue 9, 1998, Pages 4822-4833

Elastic-strain tensor by Rietveld refinement of diffraction measurements

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[No Author keywords available]

Indexed keywords


EID: 0001678175     PISSN: 00218979     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.368724     Document Type: Article
Times cited : (23)

References (41)
  • 5
    • 0004326059 scopus 로고
    • Oxford University Press, Oxford
    • R. A. Young, Editor, The Rietveld Method (Oxford University Press, Oxford, 1993).
    • (1993) The Rietveld Method
    • Young, R.A.1
  • 13
    • 85034476258 scopus 로고    scopus 로고
    • note
    • 3.
  • 15
    • 85034462342 scopus 로고    scopus 로고
    • note
    • If texture exists, the measured interplanar spacing is weighted by the ODF and the general texture effects have to be considered carefully. Because the integration in Eq. (11) is around the normal to the diffracting plane, for crystal symmetries where elastic properties are isotropic in that plane (such as {111} cubic and {001} hexagonal), it is expected that texture has no effect if the sample symmetry axis coincides with that direction. This may explain why the 〈hhh〉 strains of cubic materials do not show texture effects (Ref. 12). In the example given later in this study, Al matrix possesses a strong cylindrically symmetrical [111] texture and SiC hexagonal whiskers a strong [001] cylindrically symmetrical texture (compare to Fig. 5). Thus, the averaging over different {hkl} in Rietveld refinement will effectively favor these preferred orientations for each phase and texture effects on measured average strains will be negligible.
  • 20
    • 0000310932 scopus 로고
    • 23) is nonzero, the measured strain at a particular φ will be different at ψ and -ψ according to Eq. (21). See in H. Dölle and V. Hauk, Z. Metallkd. 68, 728 (1977).
    • (1977) Z. Metallkd. , vol.68 , pp. 728
    • Dölle, H.1    Hauk, V.2
  • 25
    • 85034478437 scopus 로고    scopus 로고
    • note
    • The common terms are x-ray compliances and x-ray elastic constants, but they also are evidently valid for neutron diffraction.
  • 37
    • 85034475678 scopus 로고    scopus 로고
    • note
    • This is for a sufficiently small specimen, so that the absorption can be neglected. Evidently, the origin of diffraction-line shifts will depend on the relative size of a specimen and the beam. If a specimen is completely bathed in the beam at any orientation, macrostrain should balance to zero, but there will be a more pronounced systematic error in strains because of specimen shifts. Conversely, macrostrain will be measurable, as shown earlier in the article.
  • 38
    • 0003472812 scopus 로고
    • Addison-Wesley, Reading, MA
    • B. E. Warren, X-Ray Diffraction (Addison-Wesley, Reading, MA, 1969), pp. 251-314.
    • (1969) X-Ray Diffraction , pp. 251-314
    • Warren, B.E.1


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.