Metya, Avijit Kumar and Tarafder, S and Balasubramaniam, Krishnan (2017) Characterization of Tempering Behaviour of Modified 9Cr-1Mo Steel by Ultrasonic Lamb wave Mixing. In: 2nd International Conference on Emerging Materials: Characterization and Application (EMCA-2017), March, 2017, NIT, Durgapur.
This work demonstrates the use of mixing of ultrasonic Lamb waves to characterize the tempering behaviour in metallic plate. Lamb wave mixing has been used to measure the generated second harmonic during tempering of mod.9Cr-1Mo steel plate. As-received material is normalized at 1080°C and then tempered in the temperature range of 600 - 850°C with a step size of 50°C for 1.5hrs and followed by furnace cooling. Lamb wave mixing technique has been used to assess the tempering behaviour of this material. Nonlinear ultrasonic parameter β which is the ratio of 2nd harmonic amplitude to the multiplication of the fundamental amplitudes is determined from the mixing wave at each temperature and correlated with microstructural characteristics. It is seen that this nonlinear acoustic parameter (β) is sensitive towards coherency strain generated between precipitate and matrix during tempering.
|Item Type:||Conference or Workshop Item (Paper)|
|Uncontrolled Keywords:||Lamb wave mixingNonlinearity parameterTemperingMod. 9Cr-1Mo steel|
|Divisions:||Material Science and Technology|
|Deposited By:||Mr. Avijit Kr. Metya|
|Deposited On:||14 May 2020 11:17|
|Last Modified:||14 May 2020 11:17|
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