Mohapatra, J N and Swaminathan, J and Ghosh, M K and Mitra, A (2010) Magnetic Nondestructive Evaluation of Creep Behavior in Water-Quenched Modified 9Cr-1Mo Steel. Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science, 41A (4). pp. 900-905.
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Water-quenched modified 9Cr-1Mo steel was creep tested in the laboratory at a temperature of 600 A degrees C and 125 MPa stress. Magnetic Barkhausen emissions (MBE) measurements were carried out by interrupting the test at different lengths of time. Creep damage in such steel was observed by an increase in root mean square (RMS) voltage of the MBE. The magnetic softening was corroborated with the decrease in pinning density in the material for the coarsening of carbides (M23C6) and formation of massive phases (Fe2Mo), which comes at the expense of a large number of finer carbides. Before failure, the rate of increase in RMS voltage of the MBE decreased due to the demagnetizing field offered by the massive phases. The microstructural analysis was carried out using scanning electron microscopy (SEM) and transmission electron microscopy (TEM) study.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Barkhausen Emissions; 5Cr-0.5Mo Steel; Mo Steel; Hysteresis; Noise; Weld |
| Subjects: | Materials Science |
| Divisions: | Material Science and Technology |
| Depositing User: | Users 74 not found. |
| Date Deposited: | 13 Jul 2011 06:20 |
| Last Modified: | 25 Jan 2012 05:33 |
| URI: | http://eprints.nmlindia.org/id/eprint/3279 |
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