Reducing yield asymmetry in a wrought Mg–9Al alloy by randomized texture achieved via multi-directional forging

Wei, Jie; You, Jing Han; Zhang, Dongdong; Jiang, Shunong; Chen, Zhiyong; Liu, Chuming

doi:10.1016/j.msea.2020.140003

Cited by 20 publications

(2 citation statements)

References 44 publications

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“…Several SPD methods, such as accumulative roll bounding, equal-channel angular pressing, friction stir processing and constrained groove pressing and multi-directional forging (MDF) [7][8][9][10][11][12][13][14][15][16][17], have found industrial applications. MDF has various advantages, such as repeatability, cost effectiveness, simplicity and the possibility of fabricating large parts [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Microstructural Evolution in Large-Section Plastic Mould Steel during Multi-Directional Forging

Chen

et al. 2022

Metals

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To obtain excellent mechanical properties from large cross-sections of plastic mould steel (SDP1), we conducted multi-directional forging (MDF) to control the microstructure of ingots. To investigate the microstructural evolution of SDP1 steel during MDF, we performed hot forging at 1150 °C using a THP01–500A hydraulic press. The dimensions of the specimens were Φ38 mm × 80 mm. The microstructure of the specimens after forging was observed under a metallographic microscope. Furthermore, the results of the finite element method (FEM) simulations were employed to improve the quality of the forgings. The predicted results agreed well with the experimental ones, indicating that FEM is effective for analysing microstructural evolution during MDF. Thus, MDF for large cross-sections of SDP1 steel (Φ1000 mm × 2200 mm) was simulated. The results showed that the average grain size of SDP1 steel at the core of an ingot after MDF ranged from 40.6 to 43.3 μm. Although this was slightly higher than the grain size of the sample after traditional upsetting and stretching forging (TUSF) (35.7–46.0 μm), the microstructure of the SDP1 steel sample after MDF was more uniform than that after TUSF. Compared with TUSF, MDF not only refines the grain size but also improves the microstructure uniformity of the sample.

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Section: Introductionmentioning

confidence: 99%

Microstructural Evolution in Large-Section Plastic Mould Steel during Multi-Directional Forging

Chen

et al. 2022

Metals

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“…The asymmetry of magnesium alloys severely restricts their extensive commercial application. [13,14] Therefore, it is urgent that the symmetry of magnesium alloys be improved.…”

Section: Introductionmentioning

confidence: 99%

Improving Tension/Compression Asymmetry of a Hot‐Extruded Mg–Zn–Y–Zr Alloy via Yttrium Addition

et al. 2021

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In this study, effects of different yttrium (Y) contents ranging from 0 to 2.5 wt% on the microstructure and tension/compression asymmetry of as‐extruded Mg–5.5Zn–0.6Zr alloys are investigated. The influence of Y on improving the tension/compression yield strength is been studied. The results show that the volume fractions of the microscale I (Mg3YZn6) and W (Mg3Zn3Y2) phases remarkably increase with Y addition. Simultaneously, the nanoscale MgZn and Mg–Zn–Y phases uniformly precipitate during extrusion. Benefiting from the pinning of second phases, the microstructure is strikingly refined from 16.3 to 5.5 μm. Among them, the Y element promotes grain refinement most effectively when the Y content is 2.0 wt%. Second phase strengthening and fine‐grain strengthening enhance the hardening rate and suppress twinning, which leads to the improvement of the tension/compression asymmetry. Specifically, yield strength of 231 MPa and ultimate tensile strength of 312 MPa are achieved with 2.5 wt% Y addition. The relative increment is about 33.0% and 65.3% compared to the unmodified alloy, respectively. In addition, the tensile yield strength to compressive yield strength ratio (TYS/CYS) is reduced from 1.30 to 1.09.

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Twinning Deformation and Yield Asymmetry Improvement of Magnesium Alloys by Free-End Torsion

Chen,

Shen,

Song

et al. 2023

J. of Materi Eng and Perform

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Reducing yield asymmetry in a wrought Mg–9Al alloy by randomized texture achieved via multi-directional forging

Cited by 20 publications

References 44 publications

Microstructural Evolution in Large-Section Plastic Mould Steel during Multi-Directional Forging

Microstructural Evolution in Large-Section Plastic Mould Steel during Multi-Directional Forging

Improving Tension/Compression Asymmetry of a Hot‐Extruded Mg–Zn–Y–Zr Alloy via Yttrium Addition

Twinning Deformation and Yield Asymmetry Improvement of Magnesium Alloys by Free-End Torsion

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