Time to failure by thermal fatigue is primarily affected by:

Question

Quizplus · Accepted Answer

Time to failure by thermal fatigue is primarily affected by the magnitude of stress and number of cycles. This is because thermal fatigue occurs when a material is exposed to cyclic temperature changes, leading to expansion and contraction and resulting in microcracks that propagate over time. The higher the stress and larger the number of cycles, the faster the propagation of microcracks and subsequent failure of the material. Carbon content in the material and operating temperature may also have some effect, but they are not the primary factors determining time to failure.

Time to Failure by Thermal Fatigue Is Primarily Affected By