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Effect of strain rate on stress corrosion cracking in duplex type 304 stainless steel weld metal

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Abstract

The influence of strain-rate on the stress-corrosion cracking properties of wholly austenitic Type 304 base metal and duplex austeno-ferritic Type 304 weld metal in boiling MgCl2 was investigated using constant extension rate tensile testing techniques. Transgranular SCC in both base and weld metals is preferred at low strain-rates, while intergranular cracking in the base metal and interphase cracking along the austenite-ferrite interface in the weld metal are preferred at higher strain-rates. Promotion of the intergranular stress-corrosion cracking in the base metal and “interphase-interface” stresscorrosion cracking in the weld metal with increases in strain-rate may be mechanistically analogous. Stress-induced alterations in the grain or interphase boundary defect structure may make these regions preferentially susceptible to dissolution.

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References

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Authors and Affiliations

  1. Air Force Materials Laboratory, Wright Patterson AFB, 95433, OH

    W. A. Baeslack

  2. Rensselaer Polytechnic Institute, Troy, New York

    W. F. Savage (Professors of Metalurgical Engineering) & D. J. Duquette

Authors
  1. W. A. Baeslack
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  2. W. F. Savage
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  3. D. J. Duquette
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Additional information

W. A. BAESLACK III, Lt., USAF, formerly with Rensselaer Polytechnic Institute, Troy, New York

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Baeslack, W.A., Savage, W.F. & Duquette, D.J. Effect of strain rate on stress corrosion cracking in duplex type 304 stainless steel weld metal. Metall Trans A 10, 1429–1435 (1979). https://doi.org/10.1007/BF02812007

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  • DOI: https://doi.org/10.1007/BF02812007

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