Creep Strength

_____ occurs when metal is subjected to a constant tensile load at an elevated temperature?

• Fatigue

• Creep

• Impact

• Wear

Creep is a ____ dependent phenomenon.

• Temperature

• Time

• Load

• Stress cycle

Creep occurs due to sliding of _____

• Vacancies

• Voids

• Grain boundaries

• Dislocations

Which one of the following, is a static mechanical property?

• Impact strength

• Creep strength

• Fatigue strength

• Rebound hardness

The ______ the melting point and the _____ the elastic modulus, the higher is creep strength.

• Lower, lower

• Lower, higher

• Higher, lower

• Higher, higher

In _____ creep, atoms diffuse along grain boundaries and grains elongate in stress axis.

• Dislocation

• Nabarro-Herring

• Coble

• Solute drag

With which factor, a magnitude of creep doesn’t increase?

• Temperature

• Time

• Grain Size

• Stress

Crosslinking in Polymers increases creep strength.

• True

• False

Which statement is correct regarding creep strength?

• Wrought materials have higher creep strength than cast materials

• With an increase in temperature, steady state creep rate decreases

• Creep strength can be improved by precipitation hardening

• Aromatic rings in polymer decrease creep strength

__________ experiences creep at room temperature.

• Iron

• Copper

• Nickel

• Lead