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Title: Strengthening of metallic alloys with nanometer-size oxide dispersions

Abstract

Austenitic stainless steels and nickel-base alloys containing, by wt. %, 0.1 to 3.0% V, 0.01 to 0.08% C, 0.01 to 0.5% N, 0.05% max. each of Al and Ti, and 0.005 to 0.10% O, are strengthened and ductility retained by atomization of a metal melt under cover of an inert gas with added oxygen to form approximately 8 nanometer-size hollow oxides within the alloy grains and, when the alloy is aged, strengthened by precipitation of carbides and nitrides nucleated by the hollow oxides. Added strengthening is achieved by nitrogen solid solution strengthening and by the effect of solid oxides precipitated along and pinning grain boundaries to provide temperature-stabilization and refinement of the alloy grains.

Inventors:
 [1];  [2]
  1. Idaho Falls, ID
  2. Madison, WI
Issue Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
OSTI Identifier:
872309
Patent Number(s):
5908486
Assignee:
Lockheed Martin Idaho Technologies Company (Idaho Falls, ID)
Patent Classifications (CPCs):
C - CHEMISTRY C21 - METALLURGY OF IRON C21D - MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS
C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS
DOE Contract Number:  
AC07-94ID13223
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
strengthening; metallic; alloys; nanometer-size; oxide; dispersions; austenitic; stainless; steels; nickel-base; containing; wt; 01; 08; 05; max; 005; 10; strengthened; ductility; retained; atomization; metal; melt; cover; inert; gas; added; oxygen; form; approximately; hollow; oxides; alloy; grains; aged; precipitation; carbides; nitrides; nucleated; achieved; nitrogen; solid; solution; effect; precipitated; pinning; grain; boundaries; provide; temperature-stabilization; refinement; nickel-base alloys; metallic alloys; metallic alloy; base alloy; base alloys; alloys containing; stainless steels; grain boundaries; stainless steel; solid oxide; inert gas; austenitic stainless; solid solution; alloys contain; metal melt; nickel-base alloy; /75/148/

Citation Formats

Flinn, John E, and Kelly, Thomas F. Strengthening of metallic alloys with nanometer-size oxide dispersions. United States: N. p., 1999. Web.
Flinn, John E, & Kelly, Thomas F. Strengthening of metallic alloys with nanometer-size oxide dispersions. United States.
Flinn, John E, and Kelly, Thomas F. Fri . "Strengthening of metallic alloys with nanometer-size oxide dispersions". United States. https://www.osti.gov/servlets/purl/872309.
@article{osti_872309,
title = {Strengthening of metallic alloys with nanometer-size oxide dispersions},
author = {Flinn, John E and Kelly, Thomas F},
abstractNote = {Austenitic stainless steels and nickel-base alloys containing, by wt. %, 0.1 to 3.0% V, 0.01 to 0.08% C, 0.01 to 0.5% N, 0.05% max. each of Al and Ti, and 0.005 to 0.10% O, are strengthened and ductility retained by atomization of a metal melt under cover of an inert gas with added oxygen to form approximately 8 nanometer-size hollow oxides within the alloy grains and, when the alloy is aged, strengthened by precipitation of carbides and nitrides nucleated by the hollow oxides. Added strengthening is achieved by nitrogen solid solution strengthening and by the effect of solid oxides precipitated along and pinning grain boundaries to provide temperature-stabilization and refinement of the alloy grains.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

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Works referenced in this record:

Custom Age 625 Plus Alloy: A Higher Strength Alternative to Alloy 625
conference, January 1991


Void formation and precipitation during electron-irradiation in austenitic stainless steels modified with Ti, Zr and V
journal, April 1987


The Invention and Definition of Alloy 625
conference, January 1991