Analysis of backscattered ultrasound amplitude of Ti–5.8Al–4Sn–3.5Zr–0.7Nb–0.5Mo–0.3Si samples in terms of their microstructures and local textures

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DOIResolve DOI: http://doi.org/10.1016/j.actamat.2008.10.012
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TypeArticle
Journal titleActa Materialia
Volume57
Issue3
Pages708714; # of pages: 7
SubjectIMI 834; Titanium alloy; Texture heterogeneities; electron backscattering diffraction (EBSD); Backscattered ultrasound; low backscattered amplitude (LBA); high backscattered amplitude (HBA)
AbstractThe amplitudes of backscattered ultrasound were measured at 10 MHz on different samples of the near-a titanium alloy Ti–5.8Al– 4Sn–3.5Zr–0.7Nb–0.5Mo–0.3Si. Orientation imaging maps (OIMs) of these samples were also determined by electron backscatter diffraction. The backscattered amplitude appears to be related to the microstructure, notably to the orientations, volume fractions and spatial distribution of specific zones. These zones, named macrozones, are formed with a majority of primary ap grains and secondary as colonies having nearly a common crystallographic axis. To illustrate the role of the microstructure on wave propagation, the local elastic constants determining the velocities of the longitudinal ultrasonic waves were deduced from the OIMs. The analysis of the spatial distribution and variations of the elastic constants explains the observed variations in backscattered ultrasound amplitude.
Publication date
PublisherElsevier
Copyright noticeMaterial in this document is covered by the provisions of the Copyright Act, by Canadian laws, policies, regulations and international agreements. Such provisions serve to identify the information source and, in specific instances, to prohibit reproduction of materials without written permission.
LanguageEnglish
AffiliationNRC Industrial Materials Institute (IMI-IMI); NRC Institute for Aerospace Research (IAR-IRA); National Research Council Canada
Access conditionavailable
unlimited
public
Peer reviewedYes
IdentifierS1359-6454(08)00735-0
NRC number50500
NPARC number10990276
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Record identifier124a508b-cd8d-4a0b-8984-f84a500a0dbf
Record created2009-10-02
Record modified2016-05-09
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