Effect of strain rate and temperature on the susceptibility of 304 austenitic stainless steel to hydrogen embrittlement
Conference
·
OSTI ID:350089
- Petroleum Research Center, Tripoli (Libyan Arab Jamahiriya)
Cathodic charging of notched 304 austenitic stainless steel specimens was carried out in aqueous solution of 1N H{sub 2}SO{sub 4}, containing 250 mg/l NaAsO{sub 2}, at room temperature and 70 {+-} 2 C while undergoing tensile straining over a wide range of crosshead speed (833 {micro}m/s, 83 {micro}m/s, 8.3 {micro}m/s, 833 nm/s, 83 nm/s and 9.8 nm/s). Test at room temperature 22 {+-} 2 C resulted in a marked reduction in the elongation to fracture ratio (Esol/Eair) by reducing the crosshead speed. However, little reduction was observed in the stress to fracture ratio ({sigma}sol/{sigma}air). Quasi cleavage and intergranular fractures where the predominant failure modes when tests were carried out at low crosshead speeds, The extent of these modes of fracture was observed to increase by reducing the crosshead speed. Cathodic charging of 304 austenitic stainless steel at 70 {+-} 2 C caused less reduction in the elongation to fracture ratio compared to the tests carried out at room temperature. Consistent with the room temperature test results, the reduction in the elongation to fracture ratio was found to increase with reduced crosshead speed. However, restoration in the elongation to fracture ratio was exhibited by 304 austenitic stainless steel specimens tested at the lowest crosshead speed (9.8 nm/s). These results are in good agreement with the finding that hydrogen embrittlement is temperature and strain dependent. Quasi cleavage fracture associated with the plastic deformation was the predominant failure mode exhibited by 304 austenitic stainless steel specimens tested at 70 {+-} 2 C at low crosshead speeds.
- OSTI ID:
- 350089
- Report Number(s):
- CONF-980316--
- Country of Publication:
- United States
- Language:
- English
Similar Records
Influence of nitrogen alloying on hydrogen embrittlement in AISI 304-type stainless steels
Irradiated Type 304 SS bend test ductility
Tensile ductility of austenitic steels in air and hydrogen
Journal Article
·
Fri Nov 30 23:00:00 EST 1984
· Metall. Trans., A; (United States)
·
OSTI ID:6088240
Irradiated Type 304 SS bend test ductility
Conference
·
Mon Dec 31 23:00:00 EST 1979
·
OSTI ID:5649065
Tensile ductility of austenitic steels in air and hydrogen
Journal Article
·
Thu Mar 31 23:00:00 EST 1977
· J. Eng. Mater. Technol.; (United States)
·
OSTI ID:7299988