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The ratio of fatigue strength of the material in the transverse direction to longitudinal direction (of their extrusion) will be highest in ___________

The ratio of fatigue strength of the material in the transverse direction to longitudinal direction (of their extrusion) will be highest in ___________ Correct Answer vacuum melting sample

The variation in the fatigue strength along the longitudinal and the transverse direction happens because of the presence of the inclusion in the sample. If the inclusion is high, it will create a region of stress concentration on the tip and reduces the fatigue strength. So, the material with minimum inclusion will have most upper strength along transverse direction, and the ratio will be high. In case of vacuum melting, the presence of the inclusion in the sample will be minimum, so ratio will be highest.

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