Metallurgical Transactions A

, Volume 13, Issue 11, pp 2027–2033 | Cite as

Stress corrosion of Cu- Zn and Cu- Zn- Ni alloys: The role of dealloying

  • Arvind Parthasarathi
  • Ned W. Polan
Envioronmental Interactions
Received:

Abstract

Evidence is presented to demonstrate the occurrence of strain induced dealloying during stress corrosion of Cu-Zn alloys with 15-30 pct Zn and a Cu-28 pct Zn-12 pct Ni alloy. The binary Cu-Zn alloys cracked intergranularly in the ammoniacal solutions used, whereas cracking was transgranular in the ternary alloy. Dealloying was thus found to be a common feature of both modes of cracking. The results further indicate that this dealloying occurs only during crack propagation and not during the incubation period before crack initiation. Additional support for these observations was provided by slow strain rate stress corrosion tests on the Cu-30 pct Zn alloy. These results are consistent with a dealloying model for stress corrosion cracking. The possible mechanisms for the enhanced room temperature transport of solute atoms, required in this model, are discussed.

Keywords

Corrosion Product Stress Corrosion Stress Corrosion Crack Solute Atom Slow Strain Rate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© American Society for metals and the metallurgical society of AIME 1982

Authors and Affiliations

  • Arvind Parthasarathi
    • 1
  • Ned W. Polan
    • 1
  1. 1.Olin Brass Metals Research LaboratoryNew Haven

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