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Title: Microstructure investigation of 13Cr-2Mo ODS steel components obtained by high voltage electric discharge compaction technique

Refractory oxide dispersion strengthened 13Cr-2Mo steel powder was successfully consolidated to near theoretical density using high voltage electric discharge compaction. Cylindrical samples with relative density from 90% to 97% and dimensions of 10 mm in diameter and 10–15 mm in height were obtained. Consolidation conditions such as pressure and voltage were varied in some ranges to determine the optimal compaction regime. Three different concentrations of yttria were used to identify its effect on the properties of the samples. It is shown that the utilized ultra-rapid consolidation process in combination with high transmitted energy allows obtaining high density compacts, retaining the initial structure with minimal grain growth. The experimental results indicate some heterogeneity of the structure which may occur in the external layers of the tested samples due to various thermal and electromagnetic in-processing effects. As a result, the choice of the optimal parameters of the consolidation enables obtaining samples of acceptable quality.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [3]
  1. Moscow Engineering Physics Univ., Moscow (Russia)
  2. National Research Tomsk Polytechnic Univ., Tomsk (Russia)
  3. Moscow Engineering Physics Univ., Moscow (Russia); National Research Tomsk Polytechnic Univ., Tomsk (Russia); San Diego State Univ., San Diego, CA (United States)
Publication Date:
OSTI Identifier:
1239686
Grant/Contract Number:
SC0008581
Type:
Accepted Manuscript
Journal Name:
Materials
Additional Journal Information:
Journal Volume: 8; Journal Issue: 11; Journal ID: ISSN 1996-1944
Publisher:
MDPI
Research Org:
San Diego State Univ., San Diego, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE field-assisted; powder consolidation; steel; oxide dispersion strengthening