Metal treatment – Stock – Directionally solidified
Patent
1995-06-22
1997-10-21
Simmons, David A.
Metal treatment
Stock
Directionally solidified
148410, 148419, 415200, C22C 1905
Patent
active
056791801
ABSTRACT:
The present invention relates to a .gamma." strengthened nickel based alloy having an improved resistance to hydrogen embrittlement and to a process for forming the same. The nickel based alloy consists essentially of from about 0.02 to 0.06 wt % carbon, from about 11 to 13 wt % chromium, from about 17 to 19 wt % iron, from about 2.80 to 3.30 wt % molybdenum, from about 5.75 to about 6.25 wt % columbium+tantalum, from about 1.75 to 2.25 wt % titanium, from about 0.4 to 0.8 wt % aluminum and the balance essentially nickel and is in single crystal form. The nickel based alloy of the present invention has particular utility in high pressure hydrogen environments such as rocket engine components.
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patent: 3575734 (1971-04-01), Muzyka
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patent: 5395584 (1995-03-01), Berger et al.
patent: 5470371 (1995-11-01), Darolia
DeLuca, D.P. and R.W Hatala; "Single Crystal PWA 1472 in High Pressure Hydrogen" Superalloys 718, 625, 706 and Variant Derivatives, Proc. Int'l Symp 3rd, 817-826 1994.
CA 121:210697a of "Single Crystal PWA 1472 in High Pressure Hydrogen" by D.P. DeLuca et al Oct. 31, 1994.
Phipps Margery S.
Simmons David A.
United Technologies Corporation
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