Fatigue Failure of Hydrogen-Embrittled High-Strength Steels.
Abstract
This report studies the fatigue fracture behavior of two hydrogen-embrittled high-strength steels, HY-130 and T-1, under cyclic load conditions. The cathodically charged, quenched, and tempered martensitic steels were subjected to fatigue tests conducted at room temperature in air at 10 cycles per second in a tension-tension sinusoidal mode. Stereo viewing of SEM fractographs, in conjunction with optical microscopy, was used to identify the topography of the fatigue zone. The fatigue zone of hydrogen-embrittled samples displayed a dispersion of craters which were absent in the fatigue zone of unembrittled specimens. It is proposed that the crater-type fracture mode in hydrogen-embrittled steels under cyclic load conditions is formed by the simultaneous, sub-surface nucleation of transverse and longitudinal cracks.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1975
- Accession Number
- ADA013380
Entities
People
- J. Aleszka
- Y. G. Kim
Organizations
- Construction Engineering Research Laboratory