Dislocation Density Determinations in Composites

descriptionPublicationkeyboard_double_arrow_right Article 01 Apr 1986 English Publisher:Springer Science and Business Media LLCJournal:JOM, volume 38, pages 33-35 (issn: 1047-4838, eissn: 1543-1851,

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Authors: J. T. Hartman; K. H. Keene; R. J. Armstrong; A. Wolfenden;

doi: 10.1007/bf03257867

Dislocation Density Determinations in Composites

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Abstract

This paper analyzes measurements of the strain amplitude dependence of internal friction for several metal matrix composites (1100 Al, 2124 Al, and 6061 Al reinforced with SiC) to determine the concentration of dislocations that were mobile during low strain (<10−4 ultrasonic tests. The apparatus used was the PUCOT (Piezoelectric Ultrasonic Composite Oscillator Technique) at room temperature and at 80 or 100 kHz. Two approaches to the analysis are considered: the Granato-Luecke (G-L) theory of dislocation damping for 0 K (GL0K), and the G-L theory for high temperatures (GLHT).

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