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In general, titanium castings exhibits excellent fatigue strength due to its high rigidity.

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in Casting-Forming-Welding II by (119k points)
In general, titanium castings exhibits excellent fatigue strength due to its high rigidity.

(a) True

(b) False

I got this question in an international level competition.

My question comes from Melting of Titanium Alloys topic in division Foundry Introduction & Materials of Casting-Forming-Welding II

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Correct choice is (b) False

For explanation: Titanium castings generally have beta structure which is combined with excellent creep resistance, fatigue crack resistance and tensile properties. But the titanium castings exhibits very low fatigue strength due to the presence of porosities in the castings. These porosities can be treated by isostatic pressing to improve properties of the titanium castings.

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