The use of the temperature dependence of ultrasonic velocity in the measurements of residual stresses in aluminum and A533B steel

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dc.contributor.advisorSalama, Kamel
dc.contributor.committeeMemberCook, Bill D.
dc.contributor.committeeMemberLong, Stuart A.
dc.creatorWang, Jen Jo
dc.date.accessioned2024-06-06T21:01:00Z
dc.date.available2024-06-06T21:01:00Z
dc.date.issued1981
dc.description.abstractThe effects of applied stress on the temperature dependence of 10 MHz ultrasonic longitudinal velocity have been studied in aluminum and steel. The study was made on the three aluminum alloys, 6061-T4, 2024- T351, and 3003-T251, and the steel alloy type A533B. In all measurements, the ultrasonic velocity is found to decrease linearly with temperature, and the slope of the linear relationship varies considerably when the specimen is subjected to stress. This slope is also found to change linearly as a function of applied stress. The results obtained on the aluminum alloys show that the temperature dependence of ultrasonic velocity increases as the amount of applied stress is increased for both tensile and compressive stresses. These results also indicate that the relative changes in the temperature dependence of ultrasonic velocity due to applied stress are insensitive to composition and texture, and the data obtained on the three types of alloys can be represented by a single relationship. Using this relationship, the sensitivity in determining unknown residual stresses in these alloys is estimated to be [plus-minus]10 MPa. The results obtained on type A533B steel, however, show that the slope of the linear relationship between velocity and temperature increases or decreases according to whether the stress is applied in tension or in compression respectively. The results also indicate that the relative change in the temperature dependence of the velocity is a linear function of applied stress, and the slope of this linear relationship is the same for both tensile and compressive stresses. These results were used to determine the value of the temperature dependence of the ultrasonic velocity at zero residual stress. They were further used to obtain a relationship between the temperature dependence and the residual stress. This relationship represents the calibration which can be utilized for the determination of unimown residual stresses in type A533B steel. The sensitivity of this method in the determination of residual stresses in this steel is estimated to be [plus-minus]34 MPa.
dc.description.departmentMechanical Engineering, Department of
dc.format.digitalOriginreformatted digital
dc.format.mimetypeapplication/pdf
dc.identifier.other8964900
dc.identifier.urihttps://hdl.handle.net/10657/17530
dc.language.isoen
dc.rightsThis item is protected by copyright but is made available here under a claim of fair use (17 U.S.C. Section 107) for non-profit research and educational purposes. Users of this work assume the responsibility for determining copyright status prior to reusing, publishing, or reproducing this item for purposes other than what is allowed by fair use or other copyright exemptions. Any reuse of this item in excess of fair use or other copyright exemptions requires express permission of the copyright holder.
dc.subjectStrains and stresses
dc.subjectSteel--Testing
dc.subjectAluminum--Testing
dc.titleThe use of the temperature dependence of ultrasonic velocity in the measurements of residual stresses in aluminum and A533B steel
dc.type.dcmiText
dc.type.genreThesis
thesis.degree.collegeCullen College of Engineering
thesis.degree.departmentMechanical Engineering, Department of
thesis.degree.disciplineMechanical Engineering
thesis.degree.grantorUniversity of Houston
thesis.degree.levelMasters
thesis.degree.nameMaster of Science

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