Strain-induced martensitic transformation in fatigue crack tip zone for a high strength steel

Journal Article · Fri Jul 15 00:00:00 EDT 2005 · Materials Characterization

DOI:https://doi.org/10.1016/j.matchar.2005.02.004· OSTI ID:20748754

Huo, C Y ^[1]; Gao, H L ^[2]

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1. Material Science and Engineering Institute, Xi'an Jiatong University, Xi'an, Shaanxi 710049 (China)
2. Department of Materials Science and Engineering, Xi'an Shiyou University, Xi'an, Shaanxi 710065 (China)

The stability of retained austenite within the fatigue plastic zone of a high strength steel was studied through use of transmission electron microscopy with thin foil specimens containing fatigue cracks. The results show that retained austenite inside the plastic zone at the fatigue crack tip has been transformed into martensite due to plastic deformation. Because of the effect of the energy absorbed and crack closure in the process of strain-induced martensitic transformation, the propagation rate of fatigue crack can be reduced.

• OSTI ID: 20748754
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Journal Issue: 1 Vol. 55; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AUSTENITE
CLOSURES
CRACKS
FATIGUE
FOILS
MARTENSITE
PHASE TRANSFORMATIONS
PLASTICITY
PLASTICS
STABILITY
STEELS
STRAINS
TRANSFORMATIONS
TRANSMISSION ELECTRON MICROSCOPY
ZONES