An investigation of the sensitization behavior of Fe-Mn-Cr austenitic steels

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Standard chemical immersion (modified Strauss) tests and analytical electron microscopy (AEM) showed that reduced activation austenitic steels based on Fe-20Mn-12Cr-0.25C (wt %) are extremely prone to thermal sensitization and intergranular corrosion because of their high carbon contents and low chromium concentrations. This susceptibility to sensitization after thermal aging, fabrication, or irradiation makes their use in aqueous and other certain environments problematical. Excellent correlation between intergranular corrosion induced by immersion in the acidified CuSO{sub 4} solution and the presence of narrow chromium-depleted zones around grain boundaries, as determined by AEM, was found. Due to the need to meet reduced activation requirements, ... continued below

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Pages: (11 p)

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Bell, G.E.C.; Tortorelli, P.F.; Kenik, E.A. (Oak Ridge Associated Universities, Inc., TN (USA) & Oak Ridge National Lab., TN (USA)) January 1, 1989.

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Description

Standard chemical immersion (modified Strauss) tests and analytical electron microscopy (AEM) showed that reduced activation austenitic steels based on Fe-20Mn-12Cr-0.25C (wt %) are extremely prone to thermal sensitization and intergranular corrosion because of their high carbon contents and low chromium concentrations. This susceptibility to sensitization after thermal aging, fabrication, or irradiation makes their use in aqueous and other certain environments problematical. Excellent correlation between intergranular corrosion induced by immersion in the acidified CuSO{sub 4} solution and the presence of narrow chromium-depleted zones around grain boundaries, as determined by AEM, was found. Due to the need to meet reduced activation requirements, the opportunities to increase the sensitization of fully austenitic Fe-Mn-Cr steels by alloy design are limited. 10 refs., 4 figs., 1 tab.

Physical Description

Pages: (11 p)

Notes

NTIS, PC A03/MF A01; OSTI; INIS; GPO Dep.

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  • 4. international conference on fusion reactor materials, Kyoto (Japan), 4-8 Dec 1989

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  • Other: DE90002719
  • Report No.: CONF-891204-3
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 5395929
  • Archival Resource Key: ark:/67531/metadc1070343

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 1989

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  • Feb. 4, 2018, 10:51 a.m.

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  • April 25, 2018, 5:29 p.m.

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Bell, G.E.C.; Tortorelli, P.F.; Kenik, E.A. (Oak Ridge Associated Universities, Inc., TN (USA) & Oak Ridge National Lab., TN (USA)). An investigation of the sensitization behavior of Fe-Mn-Cr austenitic steels, article, January 1, 1989; Tennessee. (digital.library.unt.edu/ark:/67531/metadc1070343/: accessed May 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.