Evaluation of Crystallographic Texture in SS316L Steel by Ultrasonic Signal Analysis

Metya, Avijit Kr and Palit Sagar, S and Ghosh Chowdhury, S (2014) Evaluation of Crystallographic Texture in SS316L Steel by Ultrasonic Signal Analysis. In: National Conference on Nondestructive Evaluation (NDE-2014), 04-06 Dec 2014, Pune.

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An attempt has been made to evaluate crystallographic texture in AISI 316L austenitic stainless steel through the analysis of ultrasonic signals. Results of ultrasonic signal analysis and birefringence effect were compared with orientation distribution function (ODF) of the material (macrotexture) evaluated using conventional X-Ray diffraction. In polycrystalline aggregates, ultrasonic wave velocities were strongly affected by crystallographic texture. In this work, 70% rolled steels of AISI 316L stainless steel was annealed isothermally at temperatures 450oC to 750oC at an interval of 50oC with holding time of 30 minutes at each temperature. Ultrasonic longitudinal and transverse velocities were measured in each annealed sample. Power spectrum of the windowed ultrasonic signal as well as peak shift of the shear wave signal were analyzed and co-related with the texture data. It was seen that power spectrum analysis of windowed signal could be a potential tool for evaluation of crystallographic texture in polycrystalline materials.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Texture, Ultrasonic signal, Power spectrum, SS316L
Divisions:Material Science and Technology
ID Code:7279
Deposited By:Mr. Avijit Kr. Metya
Deposited On:11 Dec 2015 10:16
Last Modified:11 Dec 2015 10:16

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