Fig. 1 Schematic of a pre-compressed sample processing, b corrosion fatigue experimental setup

Fig. 2 Longitudinal cross section microstructure of the specimens examined by EBSD: crystal orientation map in terms of the inverse pole figures for a AR, b PRC2, c PRC4; corresponding pole figures for i AR, ii PRC2, iii PRC4

Fig. 3 a Distribution of basal plane-oriented grains (red region) on the longitudinal cross section of the three investigated specimens, b calculated area fraction of the basal plane-oriented grains in the whole test area

Fig. 4 Uniaxial tensile curves of AR, PRC2 and PRC4 specimens Full size image

Fig. 5 Hydrogen evolution volume of three investigated specimens immersed in 37 °C PBS solution as a function of immersion time

Fig. 6 Corrosion product layer of three investigated specimens after hydrogen evolution tests: a AR, c PRC2, e PRC4, and the corresponding corrosion surface (without corrosion products): b AR, d PRC2, f PRC4

Fig. 7 a Variations in the strain responses with the number of cycles under different stress amplitudes; b stress-strain hysteresis loops of the 100th cycle under 120 MPa stress amplitudes; c under 65 MPa stress amplitudes

Fig. 8 Variations of the corrosion fatigue lives under the different stress amplitudes for three investigated specimens

Fig. 9 a Variations of the corrosion fatigue lives with the pre-compression deformation strain under 65 MPa stress amplitude and corresponding surfaces after corrosion fatigue tests: b AR specimen, c PRC2 specimen, d PRC4 specimen

Fig. 10 Fracture images (without corrosion products) after corrosion fatigue tests at 65 MPa for a AR specimen, c PRC2 specimen, e PRC4 specimen, and the corresponding crack nucleation region for b AR specimen, d PRC2 specimen, f PRC4 specimen

Fig. 11 Schematic illustration of forming mechanism of corrosion fatigue surface: a AR specimen, b PRC4 specimen