Metals and Materials International

, Volume 19, Issue 1, pp 19–25 | Cite as

Through-thickness SCC susceptibility of 2024-T351 and 7050-T7451 extrudates in 3.5% NaCl solution

  • Youngju Kim
  • Jaeki Kwon
  • Yooin Jeong
  • Namsub Woo
  • Sangshik Kim


The through-thickness stress corrosion cracking (SCC) behaviors of thick 2024-T351 and 7050-T7451 extrudates in 3.5% NaCl solution were studied at both anodic and cathodic applied potentials using a slow strain rate test method. The SCC susceptibilities of 2024-T351 extrudate tended to change in the throughthickness direction, with the lowest susceptibility for the surface specimen. 7050-T7451 specimens, on the other hand, did not show a notable change in the through-thickness SCC susceptibility. The fractographic analysis suggested that the grain boundary played an important role in determining the SCC susceptibility. The SCC process of each alloy was discussed based on the microscopic and fractographic examinations.

Key words

stress corrosion cracking alloy extrusion strain rate tensile test 


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Copyright information

© The Korean Institute of Metals and Materials and Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Youngju Kim
    • 1
  • Jaeki Kwon
    • 1
  • Yooin Jeong
    • 2
  • Namsub Woo
    • 1
  • Sangshik Kim
    • 3
  1. 1.Mineral Resources Research DivisionKorea Institute of Geoscience & Mineral ResourcesDaejeonKorea
  2. 2.Airframe Design Section Research & Development DivisionKorea aerospace industries, LTDSacheonKorea
  3. 3.Department of Materials Science and Engineering, ReCAPTGyeongsang National UniversityChinjuKorea

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