Effect of plane strain on microstructures and texture, through the reduction ratio of AZ31 Mg alloy

Kim, Dae-Guen; Son, Hyeon-Taek; Lee, Jae-Seol; Park, Joon Sik

doi:10.1016/j.jallcom.2011.05.048

Cited by 5 publications

(5 citation statements)

References 34 publications

(34 reference statements)

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“…During NR, only the componentε 13 varies, and other componentsε 12 andε 23 are zero at the surface of the sheet. As reported earlier [7,8,11], the action of a large shear componentε 13 during NR leads to the formation of shear deformation in the surface layer. In addition,ε 13 does not act in the central layer.…”

Section: Resultssupporting

confidence: 59%

“…Powder metallurgy by gas atomization can provide more homogeneous and finer grained structures than melting and solidification processing [5,6]. Moreover, it is reported that cross-roll rolling is effective for applying a severe shear strain on rolled materials, leading to a refinement of the microstructure and improvement in the formability of alloy sheets [7][8][9][10][11]. However, to date, there have been no studies on the forming behavior of alloy powder during cross-roll rolling.…”

Section: Introductionmentioning

confidence: 99%

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Densification and microstructure of cross-roll rolled Cu–15% In powder using copper can

Kim

Son

Lee

2012

Journal of Alloys and Compounds

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Section: Resultssupporting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Densification and microstructure of cross-roll rolled Cu–15% In powder using copper can

Kim

Son

Lee

2012

Journal of Alloys and Compounds

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“…However, there are limitations concerning the application because they have poor formability at room temperature due to their HCP structure and usually exhibit strong (0001) basal texture during the process of rolling, extrusion, etc. [2,3]. Elevating the processing temperature could improve the workability of Mg alloys, but in some cases microstructures can become unstable and exhibit massive grain growth at high temperatures [4].…”

Section: Introductionmentioning

confidence: 99%

Annealing behavior of a cast Mg-Gd-Y-Zr alloy with necklace fine grains developed under hot deformation

Yang

Xiao

et al. 2017

Materials Science and Engineering: A

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The microstructure and texture development of a cast Mg-Gd-Y-Zr alloy during hot deformation and subsequent annealing were investigated by optical microscopy (OM) and electron backscattered diffraction (EBSD) technology. Initial microstructures with partially and fully developed new fine grains (NFGs), separately attended by continuous or interrupted hot forging, were various mixed grain structures composed of NFGs in necklace and retained coarse grains. It is shown that, during annealing, the development of grain size can be divided into three stages: i.e. an incubation of grain growth, a rapid coarsening and a normal grain growth. After a long time annealing of over 10 4 ks at 693 K, the average grain size for samples continuous compressed toε= 1.2 and those interrupted compressed toε= 1.6 were close. Moreover, orientations of such strain-induced fine grains were relatively randomly distributed, leading to a weakened basal texture, while the basal plane of retained coarse grains were perpendicular to the forging direction. Such texture even became weaker during subsequent annealing. The results show that the development of necklace NFGs during hot deformation can be effective for homogeneous grain refinement under subsequent annealing.

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“…SDC presents viscous gliding of dislocation under a dragging force exerted by solute atoms, while DCC presents dislocation movement through lattice diffusion [6]. DC is prone to occuring during high strain rate hot deformation due to low stacking fault energy of Mg alloys [7]. These deformation mechanisms are closely related to microstructure features and evolution during high temperature deformation.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Features during High Temperature Tensile Deformation of an AZ31 Alloy with Nd and La Additions

Qiao

Bian

et al. 2012

AMR

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Microstructural features and tensile behaviors of an AZ31 alloy with Nd and La additions were investigated with elongation-to-failure tensile tests at constant temperatures of 300 °C, 350 °C, 400 °C, and 450 °C, and constant strain rates of 10-2s-1and 10-3s-1. Experimental data show that the material exhibits tensile ductilities of over 100% at 450 °C, featured by long steady state deformation. Microstructure studies show that annealed coarse grains were remained in the gauge region after the tensile tests, and the dominate deformation mechanism was dislocation creep, other than dynamic recrystallization or grain boundary sliding. Cavity evolution near fracture end caused premature failure of the material, although fine grains developed through dynamic recrystallization.

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Effect of plane strain on microstructures and texture, through the reduction ratio of AZ31 Mg alloy

Cited by 5 publications

References 34 publications

Densification and microstructure of cross-roll rolled Cu–15% In powder using copper can

Densification and microstructure of cross-roll rolled Cu–15% In powder using copper can

Annealing behavior of a cast Mg-Gd-Y-Zr alloy with necklace fine grains developed under hot deformation

Microstructure Features during High Temperature Tensile Deformation of an AZ31 Alloy with Nd and La Additions

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