Fractography of induction-hardened steel fractured in fatigue and overload

Journal Article · Tue Jul 01 00:00:00 EDT 1997 · Materials Characterization

DOI:https://doi.org/10.1016/S1044-5803(97)00089-2· OSTI ID:590094

Santos, C G; Laird, C ^[1]

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1. Univ. of Pennsylvania, Philadelphia, PA (United States). Dept. of Materials Science and Engineering

The fracture surfaces of induction-hardened steel specimens obtained from an auto axle were characterized, macroscopically and microscopically, after being fractured in fatigue and monotonic overload. Specimens were tested in cyclic three-point bending under load control, and the S-N curve was established for specimens that had been notched by spark machining to facilitate fractography. Scanning electron microscopy of the fractured surfaces obtained for lives spanning the range 17,000 to 418,000 cycles revealed diverse fracture morphologies, including intergranular fracture and transgranular fatigue fracture. The results are being offered to assist in the analysis of complex field failures in strongly hardened steel.

• OSTI ID: 590094
• Journal Information: Materials Characterization, Vol. 39, Issue 1; Other Information: PBD: Jul 1997
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
STEELS
FRACTURE PROPERTIES
FRACTOGRAPHY
HARDENING
FATIGUE
MECHANICAL SHAFTS
FRACTURE MECHANICS