Effect of pass reduction on distribution of shear bands and mechanical properties of AZ31B alloy sheets prepared by on-line heating rolling

Xiao, Bin; Song, Jiangfeng; Tang, Aitao; Jiang, Bin; Sun, Wenyan; Liu, Qiang; Zhao, Hua; Pan, Fusheng

doi:10.1016/j.jmatprotec.2020.116611

Cited by 25 publications

(9 citation statements)

References 21 publications

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“…Commercial AZ31B magnesium alloy sheets with dimensions of 600 mm (length) × 120 mm (width) × 1 mm (thickness) were selected as initial materials. The as-received sheets show strong basal texture, seen in our previous work [16]. As shown in Fig.…”

Section: Methodssupporting

confidence: 66%

“…The maximum texture intensity of them is 10-12, and basal pole splits toward RD. Such texture results in the higher YS and UTS in TD than RD [16]. Particularly, the texture intensity decreases from 11.5 to 10.1 when the applied tensile force increases from 1 to 3 kN, while it increases to 11.9 when further increasing the tensile force to 5 kN.…”

Section: Grain Orientation Distributionmentioning

confidence: 93%

“…All EBSD data were analyzed using Channel 5 software. In-grain misorientation axes (IJMA) analysis was applied on specimens to reveal the deformation mode during rolling process, and the detailed IJMA analysis method could reference our previous work [16].…”

Section: Methodsmentioning

confidence: 99%

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Optimized Tension for AZ31B Thin Sheets Rolled with On-Line Heating Rolling

Xiao

Song

Zhao

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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On-line heating rolling mill which could efficiently preheat sheet and apply tensile force on both ends of the sheet along rolling direction (RD) was used to investigate the effect of tension on mechanical behavior and shape quality of magnesium sheets. For revealing the influence mechanism, many analysis techniques including optical microscope, electron backscattered diffraction, macrotexture and transmission electron microscope were performed. The shape defect, edge wave, could be eliminated under higher tension along RD, which was attributed to more uniform distribution of microstructure and microstrain. Nevertheless, it is undesirable that the forward tensile force exceeds 3 kN in present work because the strength decreased for high recrystallization level when the tensile force is beyond this value. Furthermore, the main deformation mode was still slip during rolling process despite of accompanying twining, e.g., double twins, but more prismatic slip activated when tensile force exceeds 3 kN. The distribution of shear bands was affected by the applied tensile force that they appear as "V" shape along RD at a low forward or backward tensile force, while they appear as reticulate shape under applied tensile force of 5 kN.

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Section: Methodssupporting

confidence: 66%

Section: Grain Orientation Distributionmentioning

confidence: 93%

See 1 more Smart Citation

Optimized Tension for AZ31B Thin Sheets Rolled with On-Line Heating Rolling

Xiao

Song

Zhao

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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“…Eventually, new DRXed grains (marked as blue arrows) are obtained [ 40 , 41 ] and expressed as a sudden rise in the point-to-point curve in Figure 13 f. This is a typical continuous dynamic recrystallization (CDRX) mechanism [ 28 , 42 ]. In addition, it can be observed from Figure 13 d that the grain boundaries of the coarse grains G2 are serrated (marked as purple arrows), and the sub-grains are separated from the coarse grains through the sub-grain boundaries, and new DRXed grains are formed along the serrated grain boundaries, which is a typical discontinuous dynamic recrystallization (DDRX) mechanism [ 43 ]. Analysis of other regions in Figure 13 shows that CDRX and DDRX also occurred in other samples prepared by CEE-AEC process.…”

Section: Resultsmentioning

confidence: 99%

Microstructure and Texture Evolution of AZ31 Alloy Prepared by Cyclic Expansion Extrusion with Asymmetrical Extrusion Cavity at Different Temperatures

et al. 2020

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This work is to study the microstructure and texture evolution of AZ31 alloy prepared by cyclic expansion extrusion with an asymmetrical extrusion cavity (CEE-AEC) at different deformation temperatures. The result shows AZ31 alloy undergoes continuous dynamic recrystallization (CDRX) and discontinuous dynamic recrystallization (DDRX) during CEE-AEC processing. At the initial stage of deformation, AZ31 alloys exhibit similar bimodal microstructure of coarse deformed grains surrounded by fine DRXed grains. As the passes increase, the cumulative strain increases, and the coarse grains of all samples are almost replaced by fine equiaxed grains. The average grain sizes and the basal texture intensities of the deformed samples increase as the deformation temperature increases. In addition, due to the existence of an asymmetrical cavity, as the passes increase, the basal textures of all samples are deflected with maximum intensities increase, and even an unusual bimodal texture is formed, resulting in a soft orientation that is easy to basal slip.

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“…In our previous research, it is found that the online heating rolling technology has the characteristics of high efficiency and immediacy heating, which reduce energy consumption and simplify the operation process, leading to the decrease in the tendency of the edge cracking of the rolling sheet. [ 21–23 ]…”

Section: Introductionmentioning

confidence: 99%