Enhanced very high cycle fatigue performance of extruded Mg–12Gd–3Y–0.5Zr magnesium alloy

High Cycle Fatigue of Cast Mg-3Nd-0.2Zn Magnesium Alloys

“…Eventually, surface cracks are produced under these small amounts of reverse plastic strain. It is believed that slip bands are formed through the {0001} h11-20i basal slip system, which has been reported by Marrow et al [21] from their EBSD analysis and Yang et al [22] from their TEM work. Therefore, it means that the coarse-grained sample will form longer initial crack sizes (about equal to grain size) compared with the fine-grained sample, after undergoing similar cyclic loading numbers.…”

Cyclic Deformation Behavior of a Rare-Earth Containing Extruded Magnesium Alloy: Effect of Heat Treatment

“…[8,9] Despite the potential of substantial reductions in weight, most wrought Mg alloys exhibited unusual mechanical properties, e.g., tension-compression yield asymmetry, limited ductility, and pronounced directional anisotropy arising from the presence of strong crystallographic texture related to their hexagonal close-packed (HCP) structure with a limited number of slip systems activated during extrusion or rolling processes. [10][11][12][13][14][15] Indeed, for the vehicle components subjected to dynamic cyclic loading, such mechanical anisotropy and tension-compression yield asymmetry could lead to irreversibility of cyclic deformation which may have an unfavorable influence on the material performance. [15] These problems could be tackled through texture modification.…”

“…[10][11][12][13][14][15] Indeed, for the vehicle components subjected to dynamic cyclic loading, such mechanical anisotropy and tension-compression yield asymmetry could lead to irreversibility of cyclic deformation which may have an unfavorable influence on the material performance. [15] These problems could be tackled through texture modification. One appealing approach of achieving this goal is via alloy composition adjustment, e.g., addition of rare-earth (RE) elements into Mg alloys.…”

“…One appealing approach of achieving this goal is via alloy composition adjustment, e.g., addition of rare-earth (RE) elements into Mg alloys. [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] These RE-Mg alloys possess quite random initial crystallographic texture which leads to improved ductility and strength at both room and elevated temperatures via solid solution strengthening and precipitation strengthening. [31,32] It was reported that an RE element alternates the bonding energy between the Mg atom and the RE atom, thus increasing the possibility of non-basal slip and inhibiting the basal slip and f1012g twinning.…”

“…Most of the earlier studies were conducted mainly on the high cyclic fatigue properties of the RE-Mg alloys. [15,[35][36][37][38][39][40][41] Studies on the strain-controlled low-cycle fatigue behavior of RE-containing Mg alloys remain quite scarce to date. [17,24,32,[40][41][42][43][44][45][46][47] For example, Wang et al [32] studied the low-cycle fatigue behavior of extruded Mg-8.0Gd-3.0Y-0.5Zr (GW83) alloy under fully reversed strain-controlled tension-compression loading along the extrusion direction.…”