Multiaxial fatigue of extruded AZ31B magnesium alloy

Multiaxial effects on LCF behaviour and fatigue failure of AZ31B magnesium extrusion

“…On the contrary, the shear hysteresis loops for the second cycle in Fig. 6b are different than those observed in cyclic torsional loading [5,25,33]; they are not symmetric. Cyclic axial and cyclic shear behaviours can be seen from Fig.…”

“…This study was focused on the effect of twinning deformation on the cyclic behaviour and fatigue life prediction using strain and energy approaches. Later, Xiong et al [33] investigated multiaxial fatigue behaviour of AZ31B extrusion. Using this equivalent strain by Yu et al [26] they compared fatigue lives for different multiaxial loading paths and found that 90°out of phase loading is the most detrimental.…”

An asymmetric elastic–plastic analysis of the load-controlled rotating bending test and its application in the fatigue life estimation of wrought magnesium AZ31B

“…Figure 5 shows the total energy versus the life curve for AZ31B over a range of fatigue lives. Also shown are fatigue values reported in the literature [7,8,10,15,14]. It is evident that the total energy-life curve correlates fatigue data very well in both low and high cycle fatigue regimes.…”

“…Various researchers have proposed energy as a suitable parameter to correlate and estimate the fatigue life of magnesium [3,7,8,10,14,15]. Most of these studies focused on the low cycle fatigue regime.…”

A phenomenological stress–strain model for wrought magnesium alloys under elastoplastic strain-controlled variable amplitude loading

“…Extruded ME21 sheet metal is used solely in Section 4.2.4. To evaluate the proposed phenomenological model on other wrought magnesium semifinished products such as extruded rods or tubes, the raw data of Xiong et al [49] and Li et al [50] were used in Section 4.2.4: extruded AZ31B in the form of solid rods [49] and extruded AZ61A in the form of tubes [50]. At all four alloys, only results of tests with loading direction parallel to the rolling or extrusion direction were considered.…”