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Theses/Dissertations

1995

Mechanical engineering

Metallurgy

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Full-Text Articles in Engineering

Ultrasonic Measurement Of Drawability (R-Values) Of Low Carbon Steel Sheets , Kaveh Forouraghi Jan 1995

Ultrasonic Measurement Of Drawability (R-Values) Of Low Carbon Steel Sheets , Kaveh Forouraghi

Retrospective Theses and Dissertations

The present research was designed to evaluate an ultrasonic technique for measuring the drawability of low carbon steel sheets nondestructively. This technique, which uses electro magnetic acoustic transducers (EMAT's) is embodied in a fully automatic ultrasonic device called Ultra-Form, which was developed by Iowa State University in 1990. EMAT transducers generate the ultrasonic pulses in the sheet (without any need for a coupling medium) whose velocities are then related to the microstructural factors (crystallographic texture) that control drawability in rolled sheets. Drawability (usually interpreted by measuring r-values of low carbon steels) is an important property indicative of the formability ...