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Title: 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:
 [1]
  1. Knoxville, TN
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
874358
Patent Number(s):
6375705
Assignee:
U. T. Battelle, LLC (Oak Ridge, TN)
Patent Classifications (CPCs):
C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS
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}
}

Patent:

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