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Title: Microstructure of the {chi} phase in ODS ferritic alloys

Abstract

Ferritic alloys as core components of a fast neutron reactor are more resistant to swelling in the temperature range 400 to 650 C than austenitic ones but they have usually a poor creep resistance in this temperature range. In order to improve their creep properties, oxide dispersion strengthened (ODS) ferritic alloys can be elaborated by mechanical alloying, a process derived from powder metallurgy, compaction and extrusion. Therefore, two ODS ferritic alloys, DT (DT 2906) and DY (DT2203Y03), containing an intermetallic {chi} phase, have been developed by CEN/SCK, Belgium. The lattice parameter and the chemical composition of the {chi} phase have been determined by XR analysis and TEM examinations in two ODS ferritic steels. In both DT and DY alloys it is found that: the {chi} phase is partially coherent with the ferritic matrix, the stoichiometry of the {chi} phase is Fe{sub 42}Cr{sub 9}Ti{sub 5}Mo{sub 2}, and the lattice parameter is 0.886 nm. These results, which are similar to oxide free materials indicate that oxide strengthening do not affect the {chi} phase composition.

Authors:
 [1];  [2];  [1]
  1. Ecole Centrale Paris, Malabry (France)
  2. Commissariat a l`Energie Atomique, Gif sur Yvette (France). Service de Recherches Metallurgiques Appliquees
Publication Date:
OSTI Identifier:
233892
Resource Type:
Journal Article
Journal Name:
Scripta Materialia
Additional Journal Information:
Journal Volume: 34; Journal Issue: 9; Other Information: PBD: 1 May 1996
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 22 NUCLEAR REACTOR TECHNOLOGY; FERRITIC STEELS; MICROSTRUCTURE; CHROMIUM ALLOYS; TITANIUM ALLOYS; MOLYBDENUM ALLOYS; REACTORS; MATERIALS; INTERMETALLIC COMPOUNDS; CHEMICAL COMPOSITION; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION; X-RAY SPECTROSCOPY; ORIENTATION; LATTICE PARAMETERS; STOICHIOMETRY; EXPERIMENTAL DATA

Citation Formats

Zakine, C, Commissariat a l`Energie Atomique, Gif sur Yvette, Bechade, J L, and Prioul, C. Microstructure of the {chi} phase in ODS ferritic alloys. United States: N. p., 1996. Web. doi:10.1016/1359-6462(96)00001-2.
Zakine, C, Commissariat a l`Energie Atomique, Gif sur Yvette, Bechade, J L, & Prioul, C. Microstructure of the {chi} phase in ODS ferritic alloys. United States. https://doi.org/10.1016/1359-6462(96)00001-2
Zakine, C, Commissariat a l`Energie Atomique, Gif sur Yvette, Bechade, J L, and Prioul, C. 1996. "Microstructure of the {chi} phase in ODS ferritic alloys". United States. https://doi.org/10.1016/1359-6462(96)00001-2.
@article{osti_233892,
title = {Microstructure of the {chi} phase in ODS ferritic alloys},
author = {Zakine, C and Commissariat a l`Energie Atomique, Gif sur Yvette and Bechade, J L and Prioul, C},
abstractNote = {Ferritic alloys as core components of a fast neutron reactor are more resistant to swelling in the temperature range 400 to 650 C than austenitic ones but they have usually a poor creep resistance in this temperature range. In order to improve their creep properties, oxide dispersion strengthened (ODS) ferritic alloys can be elaborated by mechanical alloying, a process derived from powder metallurgy, compaction and extrusion. Therefore, two ODS ferritic alloys, DT (DT 2906) and DY (DT2203Y03), containing an intermetallic {chi} phase, have been developed by CEN/SCK, Belgium. The lattice parameter and the chemical composition of the {chi} phase have been determined by XR analysis and TEM examinations in two ODS ferritic steels. In both DT and DY alloys it is found that: the {chi} phase is partially coherent with the ferritic matrix, the stoichiometry of the {chi} phase is Fe{sub 42}Cr{sub 9}Ti{sub 5}Mo{sub 2}, and the lattice parameter is 0.886 nm. These results, which are similar to oxide free materials indicate that oxide strengthening do not affect the {chi} phase composition.},
doi = {10.1016/1359-6462(96)00001-2},
url = {https://www.osti.gov/biblio/233892}, journal = {Scripta Materialia},
number = 9,
volume = 34,
place = {United States},
year = {1996},
month = {5}
}