Exam Question

(a) (i) Creep:
Creep is the slow, time-dependent deformation of a material when it is subjected to a constant stress, particularly at high temperature. Over time, the material slowly elongates or deforms permanently under the applied load, even if the stress is below the material's yield strength.
Action:
Creep occurs because the material's atomic structure gradually shifts under stress, especially at elevated temperatures where atomic movement is more pronounced.