Abstract
Constant extension rate tests have been carried out on copper single crystals in a sodium nitrite solution, using an applied potential to accelerate the cracking. Crack velocities up to 30 nm per second were obtained at 30 °C. The stress-corrosion fracture surfaces are cleavage-like, with curved striations parallel to the crack front. If the dynamic straining is stopped, the cracks apparently stop growing within about 20 /μm. The steps between adjacent flat facets are more energy-absorbing than in a-brass, providing a possible explanation for the importance of dynamic strain. Simultaneous acoustic emission and electrochemical current transients have been measured, and suggest that cracking proceeds by discontinuous cleavage.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1941-1946 |
| Number of pages | 6 |
| Journal | Metallurgical Transactions A |
| Volume | 15 |
| Issue number | 10 |
| DOIs | |
| State | Published - Oct 1984 |
| Externally published | Yes |
ASJC Scopus subject areas
- Engineering(all)