Stress corrosion cracking of Ni-base and Ti alloys under controlled potential

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Susceptibility to stress corrosion cracking (SCC) of alloy C-22 and Ti Gr-12, two candidate alloys for the inner-container of the multi-barrier nuclear waste package, was evaluated by using the slow-strain-rate (SSR) test technique in a deaerated acidic brine (pH {approx} 2.70) at 90 C. The strain rate used was 3.3 x 10{sup {minus}6} sec{sup {minus}1}. Prior to being tested in the acidic brine, specimens of each alloy were pulled inside the test chamber in the dry condition at room temperature (RT). Then specimens were exposed to the test solution while being strained under different controlled electrochemical potentials. The magnitude of ... continued below

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Estill, J C; Gordon, S R; Logeteta, L F & Roy, A K October 22, 1998.

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Susceptibility to stress corrosion cracking (SCC) of alloy C-22 and Ti Gr-12, two candidate alloys for the inner-container of the multi-barrier nuclear waste package, was evaluated by using the slow-strain-rate (SSR) test technique in a deaerated acidic brine (pH {approx} 2.70) at 90 C. The strain rate used was 3.3 x 10{sup {minus}6} sec{sup {minus}1}. Prior to being tested in the acidic brine, specimens of each alloy were pulled inside the test chamber in the dry condition at room temperature (RT). Then specimens were exposed to the test solution while being strained under different controlled electrochemical potentials. The magnitude of the controlled potential was selected based on the corrosion potential measured in the test solution prior to straining of the specimen. Results indicate that, for Ti Gr-12, the times to failure were significantly shorter compared to those for alloy C-22. Furthermore, Ti Gr-12 showed reduced ductility in terms of percent reduction in area and true fracture stress, as the controlled potential became more cathodic. Results also indicate that the time-to-failure and percent elongation reached the minimum values when Ti Gr-12 was tested under impressed potential of {minus}1162 mV. Finally, metallographic examination was performed to evaluate the primary fracture, and the secondary cracking, if any, along the gage section of the broken tensile specimen.

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904 Kilobytes pages

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  • 7th International Conference on Nuclear Engineering, Tokyo (JP), 04/19/1999--04/23/1999

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  • Report No.: UCRL-JC-132511
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 14704
  • Archival Resource Key: ark:/67531/metadc619402

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • October 22, 1998

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  • June 16, 2015, 7:43 a.m.

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  • May 6, 2016, 2:59 p.m.

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Estill, J C; Gordon, S R; Logeteta, L F & Roy, A K. Stress corrosion cracking of Ni-base and Ti alloys under controlled potential, article, October 22, 1998; California. (digital.library.unt.edu/ark:/67531/metadc619402/: accessed December 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.