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http://dx.doi.org/10.7779/JKSNT.2012.32.2.155

Feasibility Study on Ultrasonic Velocity for Evaluation of Microstructure and Quality of Cast Iron  

Choi, C.Y. (Department of Materials Science & Engineering, Seoul National University of Science & Technology)
Hyun, C.Y. (Department of Materials Science & Engineering, Seoul National University of Science & Technology)
Byeon, Jai-Won (Department of Materials Science & Engineering, Seoul National University of Science & Technology)
Publication Information
Journal of the Korean Society for Nondestructive Testing / v.32, no.2, 2012 , pp. 155-161 More about this Journal
Abstract
It was attempted to evaluate the microstructure and quality of various types of cast iron by ultrasonic velocity measurement. Three types of commercial gray cast iron and ductile cast iron were used for this investigation, respectively. One type of the ductile cast iron was heat-treated as a function of annealing time to produce different microstructure. Ultrasonic velocity measurement, microstructural analysis (pearlite area fraction, graphite length and nodularity), and hardness measurement were performed to find empirical correlations among these parameters. Ultrasonic velocity of ductile cast iron was markedly faster than that of gray cast iron. Ultrasonic velocity decreased with the decrease of fraction of pearlite structure. As a quality monitoring parameter of cast iron, potential of ultrasonic velocity was suggested.
Keywords
Ultrasonic Velocity; Microstructure; Cast Iron; Quality Monitoring; Heat Treatment;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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