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Stress corrosion cracking of pure titanium in CH3OH/HCl solutions
- Source :
- Journal of the Society of Materials Science, Japan. 39:1298-1303
- Publication Year :
- 1990
- Publisher :
- Society of Materials Science, Japan, 1990.
-
Abstract
- The susceptibility to stress corrosion cracking (SCC) and its fracture morphology of pure titanium in CH3OH/HCl solutions with various HCl concentrations at room temperature were examined fractographically.It was found from the stress-free immersion tests in CH3OH/HCl solutions that the weight loss increased gradually with the immersion time, and that the intergranular corrosion occurred scarcely. In the subsequent tensile tests in air, however, the mechanical properties deteriorated greatly due to the intergranular embrittlement, especially during the prior immersion at a concentration of 0.4% HCl. The SCC susceptibility under constant load conditions also increased in a CH3OH/0.4% HCl solution. The fracture mode was changed from an intergranular into a transgranular fracture, and finally into a ductile fracture. A similar tendency was revealed by SCC tests under slow strain rates: In the crosshead speed of 5×10-2-5μm/s, all three modes of intergranular, transgranular and ductile fracture were observed. The aging treatment after stress-free immersion improved the mechanical properties, and thus decreased the area fraction of intergranular fracture. From the evidence introduced here, a possible mechanism for SCC of pure titanium was discussed.
- Subjects :
- Materials science
Mechanical Engineering
Metallurgy
chemistry.chemical_element
Transgranular fracture
Intergranular corrosion
Condensed Matter Physics
Intergranular fracture
chemistry
Mechanics of Materials
Ultimate tensile strength
Fracture (geology)
General Materials Science
Stress corrosion cracking
Embrittlement
Titanium
Subjects
Details
- ISSN :
- 18807488 and 05145163
- Volume :
- 39
- Database :
- OpenAIRE
- Journal :
- Journal of the Society of Materials Science, Japan
- Accession number :
- edsair.doi...........5adbcb79eb4fd4384a598f7bd74ed432