For the factors/conditions listed, select all that tend to prevent creep deforma
ID: 487201 • Letter: F
Question
For the factors/conditions listed, select all that tend to prevent creep deformation for a random polycrystalline metal sample. Decrease the applied stress on the metal part. Increase the load the part is subjected to. Increase the grain count of the metal part (for a fixed volume). Raise the service temperature that the part is exposed to. Replace with a single crystal or textured polycrystalline microstructure. Decrease the grain size of the metal part. Apply an insulative (non-structural) ceramic coating to the part. Substitute the metal for one with a higher melting point.Explanation / Answer
Polycrystalline material – Aggregate of several crystals or grains
Decrease the applied stress on the metal part - Depending on the value of the applied stress and its time duration, the deformation would become so large that a component can lose its function permanently
Substitute the metal for one with the higher melting point - effects of creep deformation become noticeable at approximately 35% of the melting point.
Apply an insulative ceramic coating to the part - Ceramic materials, like magnesium zirconate and zirconia, have a very high level of hardness, thermal resistance, and elevated melting points. so, these can help in prevention of creep