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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. 20 figs.

Inventors:
;
Issue Date:
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
6201401
Patent Number(s):
5908486 A
Application Number:
PPN: US 8-638080
Assignee:
Lockheed Martin Idaho Technologies Co., Idaho Falls, ID (United States) PTO; EDB-99-079624
DOE Contract Number:  
AC07-94ID13223
Resource Type:
Patent
Resource Relation:
Patent File Date: 26 Apr 1996
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM ADDITIONS; CARBON ADDITIONS; DUCTILITY; GRAIN REFINEMENT; NICKEL BASE ALLOYS; NITROGEN ADDITIONS; OXYGEN ADDITIONS; PRECIPITATION HARDENING; STAINLESS STEELS; TITANIUM ADDITIONS; VANADIUM ALLOYS; ALLOYS; ALUMINIUM ALLOYS; HARDENING; HIGH ALLOY STEELS; IRON ALLOYS; IRON BASE ALLOYS; MECHANICAL PROPERTIES; NICKEL ALLOYS; STEELS; TENSILE PROPERTIES; TITANIUM ALLOYS; 360101* - Metals & Alloys- Preparation & Fabrication; 360103 - Metals & Alloys- Mechanical Properties

Citation Formats

Flinn, J.E., and Kelly, T.F. Strengthening of metallic alloys with nanometer-size oxide dispersions. United States: N. p., 1999. Web.
Flinn, J.E., & Kelly, T.F. Strengthening of metallic alloys with nanometer-size oxide dispersions. United States.
Flinn, J.E., and Kelly, T.F. Tue . "Strengthening of metallic alloys with nanometer-size oxide dispersions". United States.
@article{osti_6201401,
title = {Strengthening of metallic alloys with nanometer-size oxide dispersions},
author = {Flinn, J.E. and Kelly, T.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. 20 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {6}
}