Laser Acoustic Molten Metal Depth Sensing in Titanium

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A noncontacting ultrasonic method has been investigated for probing the solidification front in molten titanium for the purposes of profiling the channel depth in a plasma hearth re-melter. The method, known as Laser Ultrasonics, utilized a pulsed laser for generation of ultrasonic waves at the surface of a molten metal pool. The ultrasonic waves propagated into the liquid titanium reflected from the solidification front and the boundaries of the solid plug. A Fabry-Perot interferometer, driven by a second laser, demodulated the small displacements caused by the ultrasonic wave motion at the liquid surface. The method and results of measurements taken ... continued below

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Walter, J. B.; Telschow, K. L. & Haun, R. E. September 22, 1999.

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A noncontacting ultrasonic method has been investigated for probing the solidification front in molten titanium for the purposes of profiling the channel depth in a plasma hearth re-melter. The method, known as Laser Ultrasonics, utilized a pulsed laser for generation of ultrasonic waves at the surface of a molten metal pool. The ultrasonic waves propagated into the liquid titanium reflected from the solidification front and the boundaries of the solid plug. A Fabry-Perot interferometer, driven by a second laser, demodulated the small displacements caused by the ultrasonic wave motion at the liquid surface. The method and results of measurements taken within a small research plasma melting furnace will be described. Successful results were obtained even directly beneath the plasma arc using this all-optical approach.

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523 Kilobytes

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  • International Symposium on Advanced Sensors for Metals Processing, 38th Annual Conference of Metallurgists, Quebec, Canada, 08/22/99 - 08/26/99

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  • Other: DE00009233
  • Report No.: INEEL/CON-99-00027
  • Grant Number: AC07-94ID13223
  • Office of Scientific & Technical Information Report Number: 9233
  • Archival Resource Key: ark:/67531/metadc794090

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  • September 22, 1999

Added to The UNT Digital Library

  • Dec. 19, 2015, 7:14 p.m.

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  • July 13, 2017, 11:17 a.m.

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Walter, J. B.; Telschow, K. L. & Haun, R. E. Laser Acoustic Molten Metal Depth Sensing in Titanium, article, September 22, 1999; Idaho Falls, Idaho. (digital.library.unt.edu/ark:/67531/metadc794090/: accessed July 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.