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Nondestructive evaluation for remanent life of modified 9Cr-1Mo steel by reversible magnetic permeability
- Issue Date
- Mar-2011
- Publisher
- ELSEVIER
- Keywords
- Remanent life; Modified 9Cr-1Mo steel; Nondestructive evaluation (NDE); Peak interval of reversible magnetic permeability (PIRMP); Larson-Miller parameter (LMP)
- Citation
- JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, v.323, no.5, pp.379 - 382
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
- Volume
- 323
- Number
- 5
- Start Page
- 379
- End Page
- 382
- ISSN
- 0304-8853
- Abstract
- We present a magnetic and nondestructive method to evaluate the remanent life of modified 9Cr-1Mo steel by measuring the reversible magnetic permeability. Specimens with ten different kinds of aging periods were prepared using an isothermal heat treatment at 690 degrees C. The Larson-Miller parameter (LMP) was calculated and the peak interval of reversible magnetic permeability (PIRMP) was measured using the surface type probe. PIRMP was inversely proportional to LMP. We can evaluate the remanent life of modified 9Cr-1Mo steel using the relationship between PIRMP and LMP. Also, we present the possibility that the tensile strength and yield strength measured by destructive methods could be estimated by PIRMP measured nondestructively.
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