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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.
Inventors:
 [1];  [2];  [1]
  1. (Oak Ridge, TN)
  2. (Lenoir City, TN)
Issue Date:
OSTI Identifier:
870556
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN) ORNL
Patent Number(s):
US 5545373
Contract Number:
AC05-84OR21400
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
high-temperature; corrosion-resistant; iron-aluminide; feal; alloys; exhibiting; improved; weldability; relates; intermetallic; comprise; atomic; percent; 30; 40; aluminum; alloyed; carbon; 04; boron; weight; ratio; alloy; range; 01; 08; transition; metals; selected; ivb; vb; vib; elements; balance; iron; exhibits; resistance; hot; cracking; welding; atomic weight; metallic alloys; metallic alloy; intermetallic alloys; metals selected; intermetallic alloy; balance iron; atomic percent; transition metals; transition metal; aluminum alloy; improved resistance; weight ratio; exhibiting improved; exhibits improved; alloy exhibits; hot cracking; improved weldability; resistant iron; aluminide intermetallic; alloys exhibiting; corrosion-resistant iron-aluminide; /420/

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