Stress- Corrosion cracking of copper single crystals

K. Sieradzki, R. L. Sabatini, R. C. Newman

Research output: Contribution to journalArticle

49 Scopus citations

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 languageEnglish (US)
Pages (from-to)1941-1946
Number of pages6
JournalMetallurgical Transactions A
Volume15
Issue number10
DOIs
StatePublished - Oct 1 1984
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)

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