Review: Magnesium Sheet Alloy Development for Room Temperature Forming

Luo, Alan A.; Shi, Renhai; Miao, Jr‐Ming; Avey, Thomas

doi:10.1007/s11837-021-04616-y

Cited by 22 publications

(9 citation statements)

References 35 publications

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“…In contrast, the compressive stress in the sheet plane mainly activates {10-12} twinning [16]. The basal texture, along with the two different load-direction-dependent plastic deformation mechanisms, results in anisotropic and asymmetric yield stresses [17,18].…”

Section: Introductionmentioning

confidence: 99%

In Situ Uniaxial Compression of Textured Magnesium AZ31B

Whitmore,

Nischler,

Saage

et al. 2023

Metals

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Strain-controlled uniaxial compression tests on textured magnesium AZ31B sheet samples were carried out using a 5 kN Kammrath & Weiss tension–compression in situ stage using a scanning electron microscope in combination with real-time electron backscatter diffraction lattice orientation mapping. The distribution of deformation twins in the samples was studied and correlated with the results of finite element simulation of the elastic strain to show that bands of twinned grains formed in areas where the principal compressive stress (σ3) was a maximum, and they formed normal to the trajectory of the principal direction of σ3. This was correlated with maps of lattice disorientation within the grains, which showed the inclination for twins to grow in alignment with local and larger-scale distributions of elastic strain. Mappings of the same area at different values of strain were made to examine the formation and growth of individual twins within the macroscopic bands of twinned grains. All the twins observed were consistent with the extension-type twin, with 86.3° disorientation with respect to the parent grain. Mappings of the grain internal disorientation were related to the elastic strain, and it was found that twin formation and growth followed the contours of the highest elastic strain within and across grains. The maximum angular disorientation found within the grains was approximately 10°, suggesting that this might correspond to a threshold of elastic strain required to initiate twinning.

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Section: Introductionmentioning

confidence: 99%

In Situ Uniaxial Compression of Textured Magnesium AZ31B

Whitmore,

Nischler,

Saage

et al. 2023

Metals

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show abstract

“…At the same time, stamping parts made of high-strength magnesium alloy are thin, uniform, lightweight, and strong. Therefore, the use of the stamping process to manufacture high-strength magnesium alloy ready-to-use parts can replace the machined parts to a certain extent, and has broad prospects in engineering applications [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Finite Element Simulation and Experimental Study of U-Bending Forming of High-Strength Mg-Gd-Y-Zn-Zr Alloy

Wang

Huang

Xing

et al. 2023

Metals

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In this study, the constitutive equation of the high-strength Mg-Gd-Y-Zn-Zr alloy sheet was established by tensile tests at different temperatures and different tensile rates. The U-shape bending forming process of the sheet was simulated under different process conditions by the DEFORM software. The variation rules of the stress field, strain field and free bending force of the formed parts were analyzed, and the accuracy of the finite element simulation was verified by the U-shaped bending test. Studies have shown that the equivalent stress, equivalent strain and free bending force decreased with the increase in forming temperature. With an increase in the stamping speed, the equivalent stress and free bending force increased, while the equivalent strain did not change significantly. Notably, the maximum difference in the free bending force between the test and simulation was less than 10%. The results of this study can provide guidance for the stamping forming of high-strength Mg-Gd-Y-Zn-Zr alloy sheets.

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“…In addition, the manufacture of metal rods, wires, or sheets needs many forming and heat-treating techniques. Usually, for this type of product, cast ingots of various shapes and sizes are used as raw materials, but in some cases metal powders or shavings are used instead [1][2][3][4][5][6][7][8][9]. The processing of metal matrix composites, apart from appropriate metal deformation, additionally requires a strong bonding between the components and a homogenous distribution of the reinforcing phases (particles or discontinuous fibers) [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Magnesium Powder Application on the Microstructure and Properties of Rods Extruded by the Forward-Backward Rotating Die Extrusion Method

et al. 2022

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The effects of severe plastic deformation (SPD) with a forward-backward rotating die (KOBO extrusion) on pure magnesium, in the form of cold-compacted powder, sintered powder, or cast ingots as reference, were examined. This method is known to reinforce metals, but the role of the initial form of magnesium applied in the fabrication of metal-based rods, as well as related phenomena, has not been characterized until now. The problem is important in the potential processing of commercial metal powders, the recycling of metal shavings, and the fabrication of metal matrix composites with discontinuous reinforcing phases. In the presented experiments, rods of 8 mm in diameter and 400 mm in length were obtained, and the structural effects induced by KOBO that occurred on a macro- and microscale on the surface and cross sections were characterized. Changes in the size and orientation of α-Mg crystallites were determined by XRD. The porosity, hardness, tensile strength, and compressive strength were measured, and the mechanisms of decohesion dependent on starting metal form were analyzed. After KOBO extrusion, significant differences were observed in the microstructure and properties between the materials derived from cold-compacted powder, sintered powder, and reference cast magnesium. Due to the application of KOBO, apart from α-Mg grain refinement, the MgO derived from the initial powder’s surface was refined to fine regular particles surrounded by magnesium. Their bands curved in the perpendicular plane and were oriented with the extrusion direction of the formed network, which augmented some mechanical properties and changed the decohesion mechanism. The conducted experiments revealed that before extrusion by KOBO, the magnesium powder required sintering under pressure.

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Review: Magnesium Sheet Alloy Development for Room Temperature Forming

Cited by 22 publications

References 35 publications

In Situ Uniaxial Compression of Textured Magnesium AZ31B

In Situ Uniaxial Compression of Textured Magnesium AZ31B

Finite Element Simulation and Experimental Study of U-Bending Forming of High-Strength Mg-Gd-Y-Zn-Zr Alloy

Effect of Magnesium Powder Application on the Microstructure and Properties of Rods Extruded by the Forward-Backward Rotating Die Extrusion Method

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