Corrosion fatigue behavior of extruded magnesium alloy AZ80-T5 in a 5% NaCl environment

Corrosion and corrosion fatigue performances of micro‐arc oxidation coating on AZ31B cast magnesium alloy

“…For the AZ31B substrate tested at 40 MPa and failing after 43 h, large pitting holes formed along the gauge length near the final fracture (red arrows in Figure a). These pitting holes may be favorable for fatigue crack initiation, similar to previous results . Under the same conditions, the MAO‐coated AZ31B (10 min) failed after 32 h, its fractographic analysis shows the corrosion products and secondary cracks along the gauge length.…”

Ratcheting and low-cycle fatigue characterizations of extruded AZ31B Mg alloy with and without corrosive environment

“…Furthermore, the corrosion rate of magnesium increased under cyclic loading compared to that in the static immersion test, indicating that fatigue accumulation accelerated the corrosion rate as well [23]. Even though surface treatments, such as electro-polishing, grinding, machining , shot peened and solution treatment [24], offered the promise of reducing the effects of corrosion on mechanical properties, corrosion fatigue lives still became shorter in comparison with those in laboratory air [25]. One thing to be noted that the above researches were focused on the high-cycle fatigue corrosion behaviors of magnesium alloys, the low-cycle fatigue tests performed in corrosive environment were really rare up to present.…”

Corrosion fatigue of a magnesium alloy in modified simulated body fluid

“…It is well-established that magnesium alloys are susceptible to pitting in chloride (Cl À ) containing solutions [41] including in simulated body fluid [12]. The drastic reduction in fatigue strength under m-SBF environment is mainly attributed to corrosion pit formation [42]. However, our work differs from others [42] in that corrosion pits appear to be crack initiation sites for all the samples tested in m-SBF, even for those tested at stress amplitudes greater than the fatigue limit in air.…”