Higher harmonic analysis of ultrasonic signal for ageing behaviour study of C-250 grade maraging steel

Metya, A and Ghosh, M and Parida, N and Palit Sagar, S (2008) Higher harmonic analysis of ultrasonic signal for ageing behaviour study of C-250 grade maraging steel. NDT & E International, 41. pp. 484-489.

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Abstract

Higher order harmonic analysis of ultrasonic signal has been applied to study the precipitation kinetics of 18Ni maraging steel. The material has been solution annealed (SA) at a temperature of 1088K for 1 h and then air quenched. Ageing of SA materials have been done at 728K for different durations of 10 min to 100 h and air cooled. It has been found that the measurement parameter of this new
technique increases with the formation of finer precipitates at the initial stage of ageing till 12 h and then decreases at longer holding time
with the coarsening of precipitates.

Item Type: Article
Uncontrolled Keywords: Higher harmonics; Maraging steel; Precipitation kinetics; Ultrasonic; Nonlinear
Subjects: Materials Science > Materials Charcterization
Divisions: Material Science and Technology
Depositing User: Dr. Avijit Kr. Metya
Date Deposited: 08 Oct 2009 06:55
Last Modified: 21 Jan 2016 12:30
URI: http://eprints.nmlindia.org/id/eprint/102

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