Location

La Jolla, CA

Start Date

1-1-1987 12:00 AM

Description

Porosity assessment of flat smooth surface cast aluminum samples by ultrasonic attenuation spectroscopy were found to be in good agreement with other porosity assessment methods, e. g., weight-density, and optical techniques [1], Ultrasonic results were also obtained for samples with their as-cast rough surface intact. The volume fraction of porosity in these samples were unacceptably underestimated [2]. Since it is not feasible to maintain a smooth surface, especially for large castings prior to ultrasonic assessment, a technique to compensate for surface roughness was considered.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

6B

Chapter

Chapter 8: Materials Characterization

Section

Properties

Pages

1435-1442

DOI

10.1007/978-1-4613-1893-4_162

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Surface Roughness Effects in Porosity Assessment by Ultrasonic Attenuation Spectroscopy

La Jolla, CA

Porosity assessment of flat smooth surface cast aluminum samples by ultrasonic attenuation spectroscopy were found to be in good agreement with other porosity assessment methods, e. g., weight-density, and optical techniques [1], Ultrasonic results were also obtained for samples with their as-cast rough surface intact. The volume fraction of porosity in these samples were unacceptably underestimated [2]. Since it is not feasible to maintain a smooth surface, especially for large castings prior to ultrasonic assessment, a technique to compensate for surface roughness was considered.