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Titanium alloy forging for aircraft parts

       Titanium alloy forgings are used for various parts of airframe structures and engines.In the case of the Boeing 787, for example, titanium alloy accounts for approximately 15% of structural members, more than doubling the amount used for conventional aircraft.

       A titanium alloy commonly used for airframe structure parts is Ti-6Al-4V,which accounts for 80 to 90% of the titanium alloys generally used for aircraft. Ti-64 is the most widely used α-βalloy, having well balanced characteristics with an abundance of data and application history.

       In aircraft engines, titanium alloys find many applications for fans and compressor parts used at temperatures of 590℃ or lower.Ti-64 alloy is used for fan disks and low-pressure compressor isks.For mid-pressure compressor disks, Ti-6Al-2Sn-4Zr-6Mo (Ti-6246) alloy and Ti-5Al-2Sn-2Zr-4Cr-4Mo (Ti-17) alloy,both near-βtype, solutioned and aged,are used.For high-pressure compressor disks, which are exposed to higher temperatures,forgings made of heat-resistant titanium alloys are used.

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