Oxide-dispersion strengthening of porous powder metalurgy parts
Abstract
Oxide dispersion strengthening of porous metal articles includes the incorporation of dispersoids of metallic oxides in elemental metal powder particles. Porous metal articles, such as filters, are fabricated using conventional techniques (extrusion, casting, isostatic pressing, etc.) of forming followed by sintering and heat treatments that induce recrystallization and grain growth within powder grains and across the sintered grain contact points. The result is so-called "oxide dispersion strengthening" which imparts, especially, large increases in creep (deformation under constant load) strength to the metal articles.
- Inventors:
-
- Knoxville, TN
- Issue Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- OSTI Identifier:
- 874358
- Patent Number(s):
- 6375705
- Assignee:
- U. T. Battelle, LLC (Oak Ridge, TN)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
B - PERFORMING OPERATIONS B22 - CASTING B22F - WORKING METALLIC POWDER
- DOE Contract Number:
- AC05-96OR22464
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- oxide-dispersion; strengthening; porous; powder; metalurgy; oxide; dispersion; metal; articles; incorporation; dispersoids; metallic; oxides; elemental; particles; filters; fabricated; conventional; techniques; extrusion; casting; isostatic; pressing; etc; forming; followed; sintering; heat; treatments; induce; recrystallization; grain; growth; grains; sintered; contact; result; so-called; imparts; especially; increases; creep; deformation; constant; load; strength; heat treatment; grain growth; metal article; metallic oxide; /75/419/
Citation Formats
Judkins, Roddie R. Oxide-dispersion strengthening of porous powder metalurgy parts. United States: N. p., 2002.
Web.
Judkins, Roddie R. Oxide-dispersion strengthening of porous powder metalurgy parts. United States.
Judkins, Roddie R. Tue .
"Oxide-dispersion strengthening of porous powder metalurgy parts". United States. https://www.osti.gov/servlets/purl/874358.
@article{osti_874358,
title = {Oxide-dispersion strengthening of porous powder metalurgy parts},
author = {Judkins, Roddie R},
abstractNote = {Oxide dispersion strengthening of porous metal articles includes the incorporation of dispersoids of metallic oxides in elemental metal powder particles. Porous metal articles, such as filters, are fabricated using conventional techniques (extrusion, casting, isostatic pressing, etc.) of forming followed by sintering and heat treatments that induce recrystallization and grain growth within powder grains and across the sintered grain contact points. The result is so-called "oxide dispersion strengthening" which imparts, especially, large increases in creep (deformation under constant load) strength to the metal articles.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}
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