Fatigue resistant cast titanium alloy articles
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United States of America Patent
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Aug 11, 2015
Grant Date -
Jun 14, 2012
app pub date -
Jun 24, 2010
filing date -
Jun 29, 2009
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Abstract
Articles that are cast from a particular titanium alloy can achieve a relatively high fatigue strength. The titanium alloy is an (α+β) titanium alloy that has a nominal composition of about 5.5 to about 6.63 mass percent aluminum, about 3.5 to about 4.5 mass percent vanadium, about 1.0 to about 2.5 mass percent chromium, maximum of 0.50 mass percent iron, about 0.15 to about 0.25 mass percent oxygen, about 0.06 to about 0.12 mass percent silicon, and at least 80 mass percent titanium or the balance titanium (Ti) with the exception of some allowable impurities. In one exemplary application, this titanium alloy may be used to cast a turbocharger compressor wheel.
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