For the factors/conditions listed, select all that tend to prevent creep deforma

Question

For the factors/conditions listed, select all that tend to prevent creep deformation for a random polycrystalline metal sample. Apply an insulative (non-structural) ceramic coating to the part. Increase the grain count of the metal part (for a fixed volume). Increase the load the part is subjected to. Raise the service temperature that the part is exposed to. Decrease the applied stress on the metal part. Replace with a single crystal or textured polycrystalline microstructure. Decrease the grain size of the metal part. Substitute the metal for one with a higher melting point.

Explanation / Answer

Creep deformation is time dependent deformation under a certain applied load.

It can be reduced by

a) Decrease the applied stress

b) Replace with a single crystal material

c) Increase the large grains

d) substitute metal for one with higher melting point

e) applying an insulative ceramic coating

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