Bio-magnesium alloys have received great attention due to their degradability and biocompatibility. Corrosion fatigue failure is a huge challenge in vivo for bio-magnesium alloy implants. Understanding the effects of twinning textures on the corrosion fatigue of magnesium alloys is meaningful for the applications. In the current study, pre-compression strains of 2% and 4% were carried out on extruded rods. The effects of twinning texture on the corrosion performance and corrosion fatigue resistance were investigated. The hydrogen evolution tests indicated that twinning texture enhanced the corrosion resistance of longitudinal cross section by improving uniformity of surface energy. The results of corrosion fatigue tests indicated that the differences in mechanical damage caused by twinning texture dominated the corrosion fatigue behavior under high stress amplitude. The secondary cracks of surface deteriorated the corrosion fatigue resistance of the original specimens under low stress amplitude. The compact corrosion film and the re-passivation of matrix suppressed the hydrogen induced cracking, thereby improving the corrosion fatigue resistance of the pre-compression specimens.

生物镁合金由于其可降解性和生物相容性而备受关注。对于生物镁合金植入物，腐蚀疲劳失效是体内的巨大挑战。了解孪生织构对镁合金腐蚀疲劳的影响对于应用很有意义。在当前的研究中，在挤压棒上进行了2％和4％的预压缩应变。研究了孪晶织构对腐蚀性能和抗腐蚀疲劳性能的影响。氢析出试验表明，孪晶织构通过改善表面能的均匀性提高了纵向截面的耐腐蚀性。腐蚀疲劳试验的结果表明，孪晶织构引起的机械损伤的差异主导了高应力振幅下的腐蚀疲劳行为。在低应力振幅下，表面的次生裂纹使原始试样的耐腐蚀疲劳性能下降。致密的腐蚀膜和基体的再钝化抑制了氢引起的裂纹，从而提高了预压缩试样的耐腐蚀疲劳性。