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It is not possible to replace super-alloys by the directionally solidified high temperature eutectics.

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in Casting-Forming-Welding I by (687k points)
It is not possible to replace super-alloys by the directionally solidified high temperature eutectics.

(a) True

(b) False

I have been asked this question in an interview for internship.

My question comes from Directional Solidification topic in section Pattern and Mould, Principles of Gating & Risering of Casting-Forming-Welding I

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Right option is (b) False

Explanation: Directional solidification of binary or pseudo-binary eutectics is able to produce well aligned regular structures consisting of fibrous constituents. Such structures may offer a substantial hike in high-temperature strength and creep resistance. So easily, there can be a replacement of super-alloys by the directionally solidified eutectics.

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