Crack-tip chemistry modeling of stage I stress corrosion cracking [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 1991.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: 16 pages : digital, PDF file
Additional Creators:: Pacific Northwest Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

Stage I stress corrosion cracking usually exhibits a very strong K dependence with Paris law exponents of up to 30. 2 Model calculations indicate that the crack velocity in this regime is controlled by transport through a salt film and that the K dependence results from crack opening controlled salt film dissolution. An ionic transport model that accounts for both electromigration through the resistive salt film and Fickian diffusion through the aqueous solution was used for these predictions. Predicted crack growth rates are in excellent agreement with measured values for Ni with P segregated to the grain boundaries and tested in IN H₂SO₄ at +900 mV. This salt film dissolution may be applicable to stage I cracking of other materials.

Report Numbers:

E 1.99:pnl-sa--19782
E 1.99: conf-9110311--1
conf-9110311--1
pnl-sa--19782

Subject(s):

Materials Science

Other Subject(s):

Note:

Published through SciTech Connect.
10/01/1991.
"pnl-sa--19782"
" conf-9110311--1"
"DE92004515"
Parkins symposium on fundamentals,Cincinnati, OH (United States),20-24 Oct 1991.
Jones, R.H.; Simonen, E.P.

Funding Information:

AC06-76RL01830

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