Improving Formability of Mg–Ca–Zr Sheet Alloy by Microalloying of Zn

Bian, Mingzhe; Zeng, Zhuoran; Xu, Shichao; Zhu, Su-Ming; Zhu, Yuman; Davies, Chris; Birbilis, Nick; Nie, Jian Feng

doi:10.1002/adem.201600293

Cited by 40 publications

(11 citation statements)

References 43 publications

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“…The sheets had good combination of tensile properties and ductility, together with excellent stretch formability, Table VI. [208,209,[242][243][244][245][246]…”

Section: Polycrystalline Plates and Sheetsmentioning

confidence: 99%

Microstructure, Deformation, and Property of Wrought Magnesium Alloys

Nie

Shin

Zeng

2020

Metall Mater Trans A

156

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Pure magnesium (Mg) develops a strong basal texture after conventional processing of hot rolling or extrusion. Consequently, it exhibits anisotropic mechanical properties and is difficult to form at room temperature. Adding appropriate alloying elements can weaken the basal texture or even change it, but the improvement in formability and mechanical properties is still far from expectations. Over the past 20 years, considerable efforts have been made and significant progress has been made on wrought Mg alloys at the fundamental and technological levels. At the fundamental level, textures formed in sheets and extrusions of different alloy compositions and produced under different strain paths or thermomechanical processing conditions are relatively well established, with the assistance of the advanced characterization technique of electron backscatter diffraction. At the technological level, room temperature formability of sheet has been significantly improved, and tension-compression yield asymmetry of extrusion is also remarkably reduced or eliminated. This paper starts with an overview of dislocations, stacking faults and twins, and deformation of single crystals of pure Mg along different orientations and under different loading conditions, followed by a review of microstructure (texture and grain size) and deformation of polycrystalline pure Mg with different textures, grain sizes, and loading conditions. With this information as a base, texture, grain size, and deformation of polycrystalline Mg alloy sheets and extrusions produced under different processing conditions are systematically examined and compared. Remaining and emerging scientific and technology issues are then highlighted and discussed in the context of texture and grain size. The need for better-resolution diffraction and spectroscopy techniques is also discussed in the relationship between texture change and grain boundary solute segregation.

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“…The sheets had good combination of tensile properties and ductility, together with excellent stretch formability, Table VI. [208,209,[242][243][244][245][246]…”

Section: Polycrystalline Plates and Sheetsmentioning

confidence: 99%

Microstructure, Deformation, and Property of Wrought Magnesium Alloys

Nie

Shin

Zeng

2020

Metall Mater Trans A

156

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“…In Al free Mg alloys, Zr is often used as the dispersoid forming element, while in Mg–Al alloys, the use of Al–Mn intermetallics is appropriate [ 23 ]. The Zr additions are also effective as grain refiners during casting, enabling the production of fine-grained stock materials [ 50 ].…”

Section: Basic Aspects Of Alloy Developmentmentioning

confidence: 99%

“…Investigations on the effect of Zn on Mg–Ca–Zr alloys showed a large increase in ductility and the potential for age hardening in a Mg-0.2Ca-0.4Zr-0.3Zn sheet [ 50 ]. The elongation to fracture was enhanced up to a value of 34% in TD because failure along the grain boundaries was suppressed.…”

Section: Mg Alloys With a Low Alloying Contentmentioning

confidence: 99%

“… 164 30 [ 85 ] as above, extr. to round bars (indirect, 1:20) at 350

C with a die-exit speed of 1.2 m min

Mg-0.8Ca-0.37Zr rolled, O, RD 133 196 14 [ 50 ] cast, hom. at 300

C for 12 h w.q., rolled at 450

C from range 5 to 1 mm thickness in 4 passes using cold rollers, reheating for 6 min between passes, annealed at 400

C for 0.5 h rolled, O, TD 126 191 9 [ 50 ] rolled, O, 45

130 189 10 [ 50 ] …”

Section: Appendix A1 Sources For Literature Researchmentioning

confidence: 99%

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Lean Wrought Magnesium Alloys

et al. 2021

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Lean magnesium alloys are considered attractive candidates for easy and economical hot forming. Such wrought alloys, defined here as materials with a maximum alloying content of one atomic or two weight percent, are known to achieve attractive mechanical properties despite their low alloy content. The good mechanical properties and the considerable hardening potential, combined with the ease of processing, make them attractive for manufacturers and users alike. This results in potential uses in a wide range of applications, from rolled or extruded components to temporary biomedical implants. The characteristic behavior of these alloys and the optimal use of suitable alloying elements are discussed and illustrated exemplarily.

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“…Recently, numerous approaches have been proposed to weaken the texture and improve the overall mechanical performance of Mg alloys . It was reported that enhanced deep draw ability of ZE10 alloy, reduced serrated cracking of AZ31 alloy, improved formability and ductility of Mg–Ca–Zr alloy were obtained after their texture was weakened. Balanced strength and ductility of Mg–Zn–Ca–La alloy was realized with texture modification .…”

mentioning

confidence: 99%

Improving the Ductility of Mg–Gd–Y–Zr Alloy through Extrusion and a Following Rolling

et al. 2018

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Ductility of the Mg-8Gd-3Y-0.4Zr alloy is improved through extrusion and a following rolling performed on the as-cast alloy. Microstructure evolution, texture, and mechanical properties of the alloy are systematically investigated.The results indicate that the continuous-cluster distributed β phase particles observed in the as-cast alloy are fragmented and dissolved during the plastic deformation. Nearly random texture, improved ductility (by 60%), and strength (by 23%) are obtained. To uncover the formation mechanism of the texture, uniaxial compression on the alloys with and without homogenization (to obtain alloys without and with β phase) is performed. The microstructure characterization reveals that β phase impedes the grain boundary immigration, resulting in the nearly random texture, thereby improving the mechanical properties, especially the ductility of the alloy.

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Improving Formability of Mg–Ca–Zr Sheet Alloy by Microalloying of Zn

Cited by 40 publications

References 43 publications

Microstructure, Deformation, and Property of Wrought Magnesium Alloys

Microstructure, Deformation, and Property of Wrought Magnesium Alloys

Lean Wrought Magnesium Alloys

Improving the Ductility of Mg–Gd–Y–Zr Alloy through Extrusion and a Following Rolling

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