Application of Low-Cycle Fatigue Test Results to Crack Initiation from Notches

Fatigue crack initiation tests were carried out on notched specimens, with K t values ranging from 1.4 to 4.2, made of a large variety of steels. The paper describes the application of the critical location approach to these tests on the basis of low-cycle fatigue data obtained on smooth specimens under Neuber control straining or under conventional reverse straining (R, = (∈ m i n /∈ m a x ) = -1).