2014

Roiko, Andrew; Solin, Jussi; Murakami, Yukitaka

Small FIB (Focused Ion Beam) milled notches were introduced in quenched and tempered 34CrNiMo6 steel to monitor initiation and growth of cracks in situ. The effect of the defects on the fatigue limit is discussed in terms of the v area model. Notches with projected v area of 30 to 56 µm normal to the applied stress were inclined by 0, 45, and 60 degrees. The effect of size and inclination on the small crack growth as well as the fatigue limit is discussed