Low-Cycle Fatigue Behavior of Hot V-Bent Structural Components Made of AZ31B Wrought Magnesium Alloy

Recent studies have shown the change of microstructure during hot-bending in uniaxial specimens made AZ31B alloy. They also investigated influence changed on quasi-static and cyclic material behavior under stress states. However, fatigue hot-bent structural components which a multiaxial inhomogeneous state occurs are still lacking. For this purpose, novel V-shaped specimen was developed, three different variants, each with bending radius, were fabricated investigated. Microstructural analyses reveal that band-like accumulations twinned grains already formed compressively stressed area process. Force-controlled low-cycle tests performed to investigate twinning evolution after loading. Subsequent show bands no longer visible but occurrence twins is evenly distributed. Due shape, subjected state. During LCF tests, strain measured using 3D digital image correlation life modeled successfully application concept highly strained volume.