An approach to assessing ultrasonic attenuation in molten magnesium alloys

Qian, Ma and Ramirez, A. (2009) An approach to assessing ultrasonic attenuation in molten magnesium alloys. Journal of Applied Physics, 105 1: 013538.1-013538.6.


Author Qian, Ma
Ramirez, A.
Title An approach to assessing ultrasonic attenuation in molten magnesium alloys
Journal name Journal of Applied Physics  (ERA 2012 Listed)    (ERA 2010 Rank A)   Check publisher's open access policy
Publication date 2009-01-01
Sub-type Article
Year available 2009
DOI 10.1063/1.3054374
Volume number 105
Issue number 1
ISSN 0021-8979; 1089-7550
Start page 013538.1
End page 013538.6
Total pages 6
Place of publication College Park, MD, United States
Publisher American Institute of Physics
Collection year 2010
Language eng
Subject C1
861206 Structural Metal Products
861203 Metal Castings
0912 Materials Engineering
091207 Metals and Alloy Materials
Abstract Few experimental data are available on ultrasonic attenuation in molten light alloys due to lack of means of characterization. An approach has been proposed and demonstrated to assessing ultrasonic attenuation in molten magnesium alloys based on the finding that the grain density in ultrasonicated magnesium alloy samples depends linearly on ultrasonic amplitude along the propagation direction. Hence, the attenuation of the ultrasonic amplitude with propagation distance can be effectively assessed according to the variations in the grain density with propagation distance. Metallographic analyses revealed that the dependence of grain density on propagation distance is best described exponentially with respect to different amplitudes. Consequently, the attenuation behavior of the ultrasonic amplitude with propagation distance can be described by the same exponential law. The characteristic ultrasonic attenuation coefficients in three benchmark molten magnesium alloys investigated were determined accordingly. The validation experiments confirmed the validity of the data produced. Ultrasonic attenuation shows dependence on alloy chemistry. ©2009 American Institute of Physics
Keyword Aluminum A356 alloy
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Thu, 03 Sep 2009, 09:00:22 EST by Mr Andrew Martlew on behalf of School of Mechanical and Mining Engineering