Comparison of high cycle fatigue behaviors of Mg–3Nd–0.2Zn–Zr alloy prepared by different casting processes

Fatigue strength dependence on the ultimate tensile strength and hardness in magnesium alloys

“…In order to investigate the crack initiation and propagation behavior, some fractured fatigue samples were sectioned using a water-cooled low-speed diamond wheel along the plane containing the longitudinal direction and fatigue crack propagation direction starting from the crack initiation site [47]. Cold mounting was used to avoid any potential microstructural change caused by hot mounting.…”

Fatigue behavior and life prediction of cast magnesium alloys

“…The increasing use of cast magnesium components under cyclic loading has drawn considerable interest in their fatigue performance. Fatigue properties of cast magnesium components strongly depend on the population of casting defects and the characteristics of microstructural constituents [11][12][13][14][15][16][17]. This has been clearly demonstrated in as-cast Mg-Zn-Y-Zr [16] and AZ91-T4 [17] Mg alloys.…”

High cycle fatigue behavior of different regions in a low-pressure sand-cast GW103K magnesium alloy component

“…14,17 The stress amplitude is much higher in the vicinity of inclusions, especially for the ones near the surface of samples. In the case of different samples under 110 MPa, extrusions or intrusions are not formed in the defect-free specimens.…”

“…The threshold stress determines the stress amplitude for the formation of slip bands, and thus governs the resistance to fatigue crack nucleation. 14,20 When the cyclic load is above the fatigue strength limit, the persistent slip bands will form and the fatigue cracks nucleate at these places.…”

“…They are always parallel to each other in a grain and are usually identified as basal slip lines. 13,14 The secondary microcracks are observed along the slip bands, and the long crack is also connected with the slip bands. This phenomenon indicates that the slip bands may lead to the final fatigue crack initiation.…”