Creep-Induced Microstructural Changes and Acoustic Characterization in a Cr–Mo–V Steel

DOI Web Site Web Site 6 Citations 34 References

Bibliographic Information

Published
2008-05-01
Rights Information
  • https://iopscience.iop.org/page/copyright
  • https://iopscience.iop.org/info/page/text-and-data-mining
DOI
  • 10.1143/jjap.47.3916
Publisher
IOP Publishing

Search this article

Description

We studied the evolution of microstructure in a Cr–Mo–V steel (JIS-SNB16) during creep by monitoring ultrasonic attenuation. After obtaining a series of creep samples with various strains under a tensile stress of 25 MPa at 923 K, we removed small samples from the creep samples and measured free vibration resonance frequencies and attenuation coefficients with electromagnetic acoustic resonance (EMAR). EMAR is a combination of the resonant acoustic technique with a non-contact electromagnetic acoustic transducer (EMAT). The attenuation measurement is inherently free from any energy loss, resulting in pure attenuation in a metal sample. Furthermore, we observed the evolution of microstructure with electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). The result from the small samples shows the same trend as our previous result from larger sample. We propose a non-destructive method using EMAR to evaluate creep damage in small specimens sampled from structural metals in-service.

Journal

Citations (6)*help

See more

References(34)*help

See more

Details 詳細情報について

Report a problem

Back to top