Murthy, G V S and Anish, K and Jayakumar, T and Ghosh, R N (2009) Characterization Of Precipitation Behavior In Nimonic 263 By Ultrasonic Velocity Measurements. Review Of Progress In Quantitative Nondestructive Evaluation, Vols 28a And 28b , 1096 . pp. 1252-1258.
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The precipitation behavior in Nimonic-263 has been studied using ultrasonic velocity and hardness measurements. The study clearly revealed that ultrasonic velocity measurements are more sensitive to the initiation of the precipitation, whereas the influence of precipitation on hardness can be felt only after the precipitates attain a minimum size to influence the movement of dislocations. These observations are corroborated with the electron microscopy studies. Further, ultrasonic shear wave velocity is found to be more sensitive than longitudinal wave velocity in assessment of precipitation of intermetallic phases. Ultrasonic velocity measurements could also reveal faster kinetics and lesser amount of precipitation at 1073 K as compared to 923 K due to higher solubility of precipitate forming elements at 1073 K.
|Uncontrolled Keywords:||Nimonic 263; Aging; Intermetallic Precipitation; Ultrasonic Velocity|
|Divisions:||Material Science and Technology|
|Deposited By:||Sahu A K|
|Deposited On:||08 Jul 2011 14:20|
|Last Modified:||25 Jan 2012 11:32|
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