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Degradation Evaluation of Mechanical Property for Modified 9Cr-1Mo Steel by Reversible Permeabilityopen access
- Issue Date
- Mar-2011
- Publisher
- KOREAN MAGNETICS SOC
- Keywords
- degradation; modified 9Cr-1Mo steel; nondestructive evaluation; peak interval of reversible permeability (PIRP)
- Citation
- JOURNAL OF MAGNETICS, v.16, no.1, pp.42 - 45
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF MAGNETICS
- Volume
- 16
- Number
- 1
- Start Page
- 42
- End Page
- 45
- ISSN
- 1226-1750
- Abstract
- The present work studies a nondestructive evaluation of the degradation of modified 9Cr-1Mo steel using a magnetic method based on the existence of the peaks of reversible permeability (RP) in the differential magnetization around the coercive force. The apparatus is based on detection of the voltage induced in a coil using a lock-in amplifier tuned to the frequency of the AC perturbing field. Results obtained for the reversible permeability and Vickers hardness on the aged samples showed the peak interval of reversible permeability (PIRP) and Vickers hardness decrease as aging time increased. The correlation between Vickes hardness and the PIRP could be used to evaluate degradation of modified 9Cr-1Mo steel.
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