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http://dx.doi.org/10.3795/KSME-A.2008.32.7.590

Elastic Modulus Prediction for Design of Sintered Aluminum by Ultrasonic  

Nam, Young-Hyun (하기소닉)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.32, no.7, 2008 , pp. 590-596 More about this Journal
Abstract
The ultrasonic velocities of sintered aluminum with varying density were measured in order to deduce the mechanical properties for optimum design of the sintered aluminum. Specimens with different densities were prepared by the plasma activated sintering machine. The density distribution of sintered aluminum becomes partially inhomogeneous because of the friction between the powder and the die during compaction. The elastic moduli are increased as the ultrasonic velocity is increased. Furthermore, Poisoon's ratio is depending on not only the density but also the size and distribution of voids. As the specimen's thickness increases, the center frequency in the frequency spectrum of the reflection wave is shifted to the low frequency. The attenuation coefficient of ultrasonic wave is decreased inversely as the density increased.
Keywords
Optimum Design; Sintering; Elastic Modulus; Powder;
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Times Cited By KSCI : 3  (Citation Analysis)
Times Cited By SCOPUS : 0
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