Dynamic evolution of texture and microstructure of AZ31 magnesium sheets during tensile-drawing bending

Cho, Jae-Hyung; Lee, Geon Young; Lee, Yun Soo

doi:10.1016/j.jallcom.2019.152120

Cited by 5 publications

(2 citation statements)

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“…Since there are microstructural changes due to the hot-bending process [21,25], microstructural analyses of the hot-bent material are shown in this section and compared with results for the as-received material. Subsequently, the microstructural findings help to understand the different mechanical properties for as-received and hot-bent material.…”

Section: Resultsmentioning

confidence: 99%

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Low-Cycle Fatigue Behavior of Hot-Bent Basal Textured AZ31B Wrought Magnesium Alloy

Nischler

Denk²,

Saage

et al. 2021

Metals

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In the recent past, several researchers have successfully modeled the complex fatigue behavior of planar twin-roll cast AZ31B alloy sheets. Complex components are usually hot-bent, whereby the microstructure in the hot-bent areas changes significantly. However, studies on the fatigue behavior of hot-bent magnesium alloys are currently lacking. Therefore, a novel, uniaxial hot-bent specimen was developed and optimized with finite element method simulations. Microstructural analyses with the electron backscatter diffraction method reveal that the hot-bending process changes the texture and increases the Schmid factor for basal slip in rolling and transverse direction of the sheet. In the subsequent quasi-static tension and compression tests, anisotropic and asymmetric yield stresses, lower Young’s moduli compared with the as-received material and macroscopic bands of twinned grains are obtained. Finally, the study proves that the recently proposed concept of highly strained volume can accurately estimate the lifetime, even by combining the as-received and hot-bent material in one fatigue model.

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Section: Resultsmentioning

confidence: 99%

“…However, structural components made of Mg sheets, such as those used in the automotive industry, have hot-bent areas. Investigations on the fatigue behavior of hot-bent magnesium structures, where the microstructure of the material changes significantly in the hot-forming zones [21][22][23][24][25], are still lacking.…”

Section: Introductionmentioning

confidence: 99%