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Title: High-temperature corrosion-resistant iron-aluminide (FeAl) alloys exhibiting improved weldability

This invention relates to improved corrosion-resistant iron-aluminide intermetallic alloys. The alloys of this invention comprise, in atomic percent, from about 30% to about 40% aluminum alloyed with from about 0.1% to about 0.5% carbon, no more than about 0.04% boron such that the atomic weight ratio of boron to carbon in the alloy is in the range of from about 0.01:1 to about 0.08:1, from about 0.01 to about 3.5% of one or more transition metals selected from Group IVB, VB, and VIB elements and the balance iron wherein the alloy exhibits improved resistance to hot cracking during welding. 13 figs.
Inventors:
; ;
Issue Date:
OSTI Identifier:
288026
Assignee:
Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States) PTO; SCA: 360101; PA: EDB-96:135462; SN: 96001636034
Patent Number(s):
US 5,545,373/A/
Application Number:
PAN: 8-301,238
Contract Number:
AC05-84OR21400
Resource Relation:
Other Information: PBD: 13 Aug 1996
Research Org:
Lockheed Martin Energy Syst Inc
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CORROSION RESISTANT ALLOYS; CHEMICAL COMPOSITION; WELDABILITY; IRON ALLOYS; ALUMINIUM ALLOYS; TRANSITION ELEMENT ALLOYS; INTERMETALLIC COMPOUNDS; CARBON ADDITIONS; BORON ADDITIONS; CRACK PROPAGATION

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