Question 8 5.25/7 pts For the factors/ conditions listed, select those that tend

Question

Question 8 5.25/7 pts For the factors/ conditions listed, select those that tend to alleviate creep deformation for a metal sample with a random polycrystalline microstructure. Raise the service temperature that the part is exposed to e Sabstitute the metal for one with a higher melting point Decrease the applied stress on the metal part Decrease the average grain size of the mecal part Increase the grain count of the metal part (for a fixed volumel. Apply an insulative (non-structural) ceramic coating to the part e Switch to a single crystal or textured polycrystalline microstructure.

Explanation / Answer

except raise the service temperature that part is exposed to, all factors alleiviate the crep deformation for a metal sampling with random polycrystaline microstructure .since higher the temperature higher is creep.crep is a time dependent deformation which generaly occur at high temperature.but for some material like lead or glass can occur at room temperature.

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