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Title: The comparison of microstructures and mechanical properties between 14Cr-Al and 14Cr-Ti ferritic ODS alloys

In this study, two kinds of 14Cr ODS alloys (14Cr-Al and 14Cr-Ti) were investigated to reveal the different effects between Al and Ti on the microstructures and mechanical properties of 14Cr ferritic ODS alloys. The microstructure information such as grains, minor phases of these two alloys has been investigated by high-energy X-ray diffraction and transmission electron microscopy (TEM). The in situ synchrotron X-ray diffraction tensile test was applied to investigate the mechanical properties of these two alloys. The lattice strains of different phases through the entire tensile deformation process in these two alloys were analyzed to calculate their elastic stresses. From the comparison of elastic stress, the strengthening capability of Y 2Ti 2O 7 is better than TiN in 14Cr-Ti, and the strengthening capability of YAH is much better than YAM and AlN in 14Cr-Al ODS. The dislocation densities of 14Cr-Ti and 14Cr-Al ODS alloys during tensile deformation were also examined by modified Williamson-Hall analyses of peak broadening, respectively. In conclusion, the different increasing speed of dislocation density with plastic deformation reveals the better strengthening effect of Y-Ti-O particles in 14Cr-Ti ODS than that of Y-Al-O particles in 14Cr-Al ODS alloy.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [2] ;  [5] ;  [2] ;  [3] ;  [3] ;  [5]
  1. Univ. of Science and Technology Beijing, Beijing (China); Univ. of Illinois at Urbana-Champaign, Champaign, IL (United States)
  2. Univ. of Science and Technology Beijing, Beijing (China)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Univ. of Illinois at Urbana-Champaign, Champaign, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
  5. Univ. of Illinois at Urbana-Champaign, Champaign, IL (United States)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Materials & Design
Additional Journal Information:
Journal Volume: 98; Journal Issue: C; Journal ID: ISSN 0264-1275
Publisher:
Elsevier
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Nuclear Energy (NE), Nuclear Energy University Programs (NEUP); USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Synchrotron X-ray diffraction; Tensile deformation; Nanoscale particles; Microstructure
OSTI Identifier:
1390900
Alternate Identifier(s):
OSTI ID: 1359526