Phase stability of laves intermetallics in stainless steel-zirconium alloys.

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Phase transformations occurring in a stainless steel-15 wt% zirconium (SS-15Zr) alloy were studied by in situ neutron diffraction. Neutron diffraction patterns as a function of time were obtained on alloys that were held at various elevated temperatures (1084-1275 C). As-cast SS-15Zr alloys contain ferrite, austenite, ZrFe{sub 2}-type Laves polytypes C36 and C15, and small amounts of a Fe{sub 23}Zr{sub 6}-type intermetallic. Annealing at high temperatures resulted in an increase of the Fe{sub 23}Zr{sub 6}, intermetallic content. The C15 Laves polytype is the equilibrium phase for T {le} 1230 C; C36 is the stable polytype at higher temperatures ({approximately}1275 C). Phase ... continued below

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13 p.

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Abraham, D. P. April 8, 1999.

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Description

Phase transformations occurring in a stainless steel-15 wt% zirconium (SS-15Zr) alloy were studied by in situ neutron diffraction. Neutron diffraction patterns as a function of time were obtained on alloys that were held at various elevated temperatures (1084-1275 C). As-cast SS-15Zr alloys contain ferrite, austenite, ZrFe{sub 2}-type Laves polytypes C36 and C15, and small amounts of a Fe{sub 23}Zr{sub 6}-type intermetallic. Annealing at high temperatures resulted in an increase of the Fe{sub 23}Zr{sub 6}, intermetallic content. The C15 Laves polytype is the equilibrium phase for T {le} 1230 C; C36 is the stable polytype at higher temperatures ({approximately}1275 C). Phase changes were slow for temperatures <1100 C.These findings have important implications for use of the SS-15Zr alloy as a nuclear waste form.

Physical Description

13 p.

Notes

INIS; OSTI as DE00010896

Medium: P; Size: 13 pages

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  • 1999 TMS Annual Meeting, San Diego, CA (US), 02/28/1999--03/04/1999

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  • Report No.: ANL/CMT/CP-96870
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 10896
  • Archival Resource Key: ark:/67531/metadc626546

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  • April 8, 1999

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  • June 16, 2015, 7:43 a.m.

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  • April 7, 2017, 1:09 p.m.

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Abraham, D. P. Phase stability of laves intermetallics in stainless steel-zirconium alloys., article, April 8, 1999; Illinois. (digital.library.unt.edu/ark:/67531/metadc626546/: accessed December 13, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.