Ni-based single crystal superalloy and turbine blade incorporating the same
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United States of America Patent
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Nov 22, 2016
Grant Date -
Oct 15, 2015
app pub date -
Jun 18, 2015
filing date -
Mar 12, 2007
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Abstract
A Ni-based single crystal superalloy which has the following composition: Co: 4.0 to 9.5 wt %, Cr: 5.1 to 8.0 wt %, Mo: 2.1 to 3.5 wt %, W: 0.0 to 2.9 wt %, Ta: 4.0 to 10.0 wt %, Al: 4.5 to 6.5 wt %, Ti: 0.0 to 1.0 wt %, Hf: 0.08 to 0.5 wt %, Nb: 0.0 to 3.0 wt %, Re: 4.5 to 8.0 wt % and Ru: 0.5 to 6.5 wt % with the remainder including Ni and unavoidable impurities, wherein P1≦700 is satisfied in which P1 represents a parameter 1, which is obtained by a formula: P1=137×[W (wt %)]+24×[Cr (wt %)]+46×[Mo (wt %)]−18×[Re (wt %)].
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