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Refractory oxides do not have any effect on molten titanium metal at the time of casting process.(a) True(b) FalseThe question was asked during an interview for a job.I would like to ask this question from Melting of Titanium Alloys topic in portion Foundry Introduction & Materials of Casting-Forming-Welding II

Answer»

The correct answer is (b) False

The best I can explain: Most of the refractory oxides like zirconia and alumina react with molten titanium to generate a layer which is ENRICHED in oxygen or inter-metallic compounds of titanium. The oxide mixes in molten titanium which gives rise to a contaminated layer that can be considered as precipitate as a SEPARATE phase on COOLING.



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