Nonlinear ultrasonic assessment of precipitation hardening in ASTM A710 steel

We investigated several specimens of ASTM A710 steel containing copper-rich precipitates with variations in the final aging treatment. X-ray diffraction line-broadening and small-angle neutron-scattering experiments revealed the existence of the precipitates and associated coherency strain. We deter...

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Bibliographic Details
Published inJournal of materials research Vol. 15; no. 9; pp. 2036 - 2042
Main Authors Hurley, D. C., Balzar, D., Purtscher, P. T.
Format Journal Article
LanguageEnglish
Published New York, USA Cambridge University Press 01.09.2000
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ISSN0884-2914
2044-5326
DOI10.1557/JMR.2000.0292

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Summary:We investigated several specimens of ASTM A710 steel containing copper-rich precipitates with variations in the final aging treatment. X-ray diffraction line-broadening and small-angle neutron-scattering experiments revealed the existence of the precipitates and associated coherency strain. We determined the nonlinear ultrasonic parameter β for each specimen by harmonic-generation experiments and measured the ultrasonic longitudinal velocity vL and attenuation αL. Although vL and aL showed no consistent trends, β increased with increasing strain. This correlation is compared to a microstructural model for harmonic generation that includes a contribution from precipitate-inned dislocations.
Bibliography:ark:/67375/6GQ-6FT4MD54-F
ArticleID:06926
istex:6211C549BA6333837008982726AB5B6220ECEF32
Also at the Department of Physics, University of Colorado, Boulder, CO 80309.
PII:S0884291400069260
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0884-2914
2044-5326
DOI:10.1557/JMR.2000.0292