Question

In cyclic loading of material, the crack is generally initiated by a sudden or abrupt failure of the material.

(a) True

(b) False

The question was posed to me by my school teacher while I was bunking the class.

My question is based upon Metallurgical Aspects topic in section Mechanical Working of Metals of Casting-Forming-Welding II

Answer 1

The correct option is (b) False

To explain: In a work-piece subjected to cyclic loading, a fatigue crack is generally initiated on a microscopically small scale which further followed by the growth of crack to a macroscopic size. And in last cycle, the material or specimen fails due to fatigue and fracture occurs which defines complete failure of the work-piece.