| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 295789 | NDT & E International | 2008 | 6 Pages |
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 1088 K for 1 h and then air quenched. Ageing of SA materials have been done at 728 K 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.
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Authors
Avijit Metya, M. Ghosh, N. Parida, S. Palit Sagar,