Stress corrosion cracking under modes I, II and III loadings

✍ Scribed by M. Yoda

• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 447 KB
• Volume: 30
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(88)90057-4

✦ Synopsis

Stress corrosion cracking tests for modes I, II and III were carried out on high tensile strength steel in water or 3.5% salt water. The single edge notched cantilever beam specimen was used for mode I. The circumferentially-notched pipe specimen for mode II and the circumferentially-notched bar specimen for mode III were subjected to sustained torsional load.

The relation between the initial stress intensity factor K, and time-to-failure 6 was obtained and compared for each fracture mode. The experimental results show that the susceptibility of the material to stress corrosion cracking was considerable for mode I but negligibly small for modes II and III. However, if the crack grows in the direction in which the mode I displacements take place, stress corrosion cracking can occur even under modes II and III loadings. The K,-I, curves show no significant difference between water and salt water for each fracture mode.