ULTRASONIC CHARACTERIZATION OF MICROSTRUCTURE IN POWDER METAL ALLOY.

B. R. Tittmann, L. A. Ahlberg, K. Fertig

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

The ultrasonic wave propagation characteristics were measured for IN-100, a powder metallurgy alloy used for aircraft engine components. This material was selected as a model system for testing the feasibility of characterizing the microstructure of a variety of inhomogeneous media including powder metals, ceramics, castings and composites. The results showed that the predominant source for the ultrasonic attenuation and backscatter was a dense (approximately 100/mm**3) distribution of small micropores (approximately 10 mu m radius). The results suggest a way towards the nondestructive detection and characterization of anomalous distributions of micropores when conventional ultrasonic imaging is difficult. The findings are potentially significant toward the application of the early detection of porosity during the materials fabrication process and after manufacturing of potential sites for stress induced void coalescence leading to crack initiation and subsequent failure.

Original languageEnglish (US)
Title of host publicationUnknown Host Publication Title
EditorsAlex Vary
PublisherNoyes Data Corp
Pages30-46
Number of pages17
ISBN (Print)0815511167
StatePublished - Dec 1 1987

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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