Fatigue behavior of multi-directionally forged commercially pure Ti thin foil with different thickness

Abstract

Tension-tension axial fatigue tests were conducted using ultrafine-grained commercial purity (CP) grade 2 titanium (Ti) thin foils with four different thicknesses, 13, 20, 30 and 50 μm, processed by multi-directional forging (MDFing) and the fatigue properties were investigated. All of the foils exhibited higher strengths in static tensile and fatigue tests than the conventional cold-rolled CP grade 2 Ti irrespective of foil thicknesses. The static and fatigue strengths of all the foils were comparable while thinner foils tended to exhibit higher strengths.