Correlation of microstructure and tensile and swelling behavior of neutron-irradiated vanadium alloys

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The microstructures of V-Ti, V-Cr-Ti, and V-Ti-Si alloys were characterized by transmission electron microscopy (TEM) after neutron irradiation in the Fast Flux Test Facility (FFTF) at 420 and 600{degrees}C to influences up to 114 dpa. Two types of irradiation-induced precipitates were identified, i.e., Ti{sub 2}O and Ti{sub 5}(Si,P){sub 3}. Blocky Ti(O,N,C) precipitates, which form by thermal processes during ingot fabrication, also were observed in all unirradiated and irradiated specimens. Irradiation-induced precipitation of spherical (<15 nm in diameter) Ti{sub 5}(Si,P){sub 3} phase was associated with superior resistance to void swelling. In specimens with negligible swelling, Ti{sub 5}(Si,P){sub 3} precipitation was significant. ... continued below

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Pages: (24 p)

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Chung, H.M. & Smith, D.L. October 1, 1991.

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The microstructures of V-Ti, V-Cr-Ti, and V-Ti-Si alloys were characterized by transmission electron microscopy (TEM) after neutron irradiation in the Fast Flux Test Facility (FFTF) at 420 and 600{degrees}C to influences up to 114 dpa. Two types of irradiation-induced precipitates were identified, i.e., Ti{sub 2}O and Ti{sub 5}(Si,P){sub 3}. Blocky Ti(O,N,C) precipitates, which form by thermal processes during ingot fabrication, also were observed in all unirradiated and irradiated specimens. Irradiation-induced precipitation of spherical (<15 nm in diameter) Ti{sub 5}(Si,P){sub 3} phase was associated with superior resistance to void swelling. In specimens with negligible swelling, Ti{sub 5}(Si,P){sub 3} precipitation was significant. It seems that ductility is significantly reduced when the precipitation of Ti{sub 2}O and Ti{sub 5}(Si,P){sub 3} is pronounced. These observations indicate that initial composition; fabrication processes; actual solute compositions of Ti, O, N, C, P, and Si after fabrication; O, N, and C uptake during service; and irradiation-induced precipitation ae interrelated and are important factors to consider in developing an optimized alloy. 15 refs., 8 figs.

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Pages: (24 p)

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OSTI; NTIS; INIS; GPO Dep.

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  • International conference on fusion reactor materials, Clearwater, FL (United States), 17-22 Nov 1991

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  • Other: DE92003448
  • Report No.: ANL/CP-72940
  • Report No.: CONF-911111--8
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 5987699
  • Archival Resource Key: ark:/67531/metadc1100195

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  • October 1, 1991

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  • Feb. 18, 2018, 3:59 p.m.

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  • April 17, 2018, 3:27 p.m.

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Chung, H.M. & Smith, D.L. Correlation of microstructure and tensile and swelling behavior of neutron-irradiated vanadium alloys, article, October 1, 1991; Illinois. (digital.library.unt.edu/ark:/67531/metadc1100195/: accessed August 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.