Interesting story on titanium testing/failure to test, etc

Triathlon Forum
1

http://pma275.navair.navy.mil/index.cfm?fuseaction=news.detail&news_id=47&page=9

This is related to cycling titanium manufacture since titnaium tubes are so widely used in the bike industry.

Anyway, FYI.

2

Tom,
Ancotech actually has been out of business for more than a year. They were only a small supplier for us, plus all the stuff we got tested very well.
Herbert

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I actually saw some of the testing at their factory, and was very impressed.

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Bike tubes are a far cry from the pencil thin tubes used in the hydrolic systems in an aviation application. They hold what? 250,000psi?

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Absolutely. Incidentally, I didn’t mean to infer any reference to any particula manufacturer of bicycles, which is why I did not name one. Poor Herbert sort of stepped on a land mine that doesn’t really exist here.

I put this up for a couple reasons: I thought it was of general interest to those who like to read such things about materials. The V-22 is an intersting aircraft. Some of the people on this forum are familiar with Ancotech. As Herbert mentioned, Ancotech has been gone for some time.

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V-22 Osprey 5000psi (most aircraft 2K-3K psi). The ti tubing failures occured when the wire bundle would chafe on the titanium. The metal oxides would inbed in the wire insulation and eventually saw through the tubing.