Development of dilute Mg–Zn–Ca–Mn alloy with high performance via extrusion

Jiang, Mo; Xu, Chao; Nakata, T.; Yan, Hong; Chen, R.S.; Kamado, Shigeharu

doi:10.1016/j.jallcom.2016.01.195

Cited by 106 publications

(57 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our previous study [25], we newly developed dilute Mg-0.21Zn-0.30Ca-0.14Mn (wt.%) alloy as low-cost wrought Mg alloy and achieved good balance of strength and ductility via slow-speed extrusion at different temperatures due to refined grains and weakened extrusion texture with RE texture component. Based on the previous studies on the extrudabiliy and effect of Ca on the extrusion texture, excellent extrudability and improved ductility could be expected in the dilute Mg-Zn-Ca-Mn alloys with an optimized Ca content of 0.30 wt.%.…”

mentioning

confidence: 99%

High-speed extrusion of dilute Mg-Zn-Ca-Mn alloys and its effect on microstructure, texture and mechanical properties

Jiang

Nakata

et al. 2016

Materials Science and Engineering: A

Self Cite

View full text Add to dashboard Cite

Three dilute Mg-Zn-Ca-Mn alloys were successfully extruded at 24 m/min and the alloy with lowest Zn content (0.21 wt.%) can even be extruded at 60 m/min without any surface defects, which was ascribed to the thermally stable Mg 2 Ca phase and high solidus temperature (620 o C). The alloys extruded at die-exit speed  6 m/min showed a fully dynamically recrystallized (DRXed) microstructure and weak rare earth (RE) texture at the position between [2 4] and [2 2] parallel to the extrusion direction. Besides, fine Mg 2 Ca and -Mn particles dynamically precipitated during extrusion, acting as effective pinning obstacles against the DRXed grain growth via Zener drag effect. Due to the deformation temperature rise with increasing extrusion speeds, the grain size increased gradually, which can be understood from the relationship between DRXed grain size and Zener-Hollomon parameter. The RE texture contributed to high uniform elongation of 23%, but the increased grain size ( 30 m) deteriorated post-uniform elongation due to the prevalence of {10 1} contraction and {10 1}-{10 2} double twins during post-uniform deformation.

show abstract

mentioning

confidence: 99%

High-speed extrusion of dilute Mg-Zn-Ca-Mn alloys and its effect on microstructure, texture and mechanical properties

Jiang

Nakata

et al. 2016

Materials Science and Engineering: A

Self Cite

View full text Add to dashboard Cite

show abstract

“…Because of a large atomic radius Ca has attracted substantial attention as a candidate to replace RE elements. Indeed, weakened basal and RE textures have recently been obtained in Ca containing conventional Mg alloys without RE additions [21,[26][27][28][29][30][31][32][33][34][35][36]. The texture modification and RE texture formation were attributed to several different mechanisms: particle stimulating nucleation (PSN) [28,36], dynamic strain aging [30], preferred growth of oriented nuclei [34], solute drag [21,33], modification of c/a ratio and stacking fault energy [29,35].…”

Section: Introductionmentioning

confidence: 99%

Effect of deformation twinning on crystallographic texture evolution in a Mg–6.6Zn–0.2Ca (ZX70) alloy during recrystallisation

Guan

Liu

Gao

et al. 2019

Journal of Alloys and Compounds

View full text Add to dashboard Cite

The entire recrystallisation sequence and associated crystallographic texture evolution of Mg-6.6Zn-0.2Ca (ZX70, wt.%) alloy were tracked using a quasi-in-situ electron backscatter diffraction (EBSD) method. The commonly observed grain boundary recrystallisation in conventional Mg alloys was largely restricted, since all the prior grain boundaries were pinned by intermetallic compounds distributed along grain boundaries. A typical "Rare Earth" (RE) texture was observed during the whole recrystallisation process. The RE texture appeared during the nucleation stage because of RE texture orientations introduced by recrystallisation from double twins. This texture was retained during the subsequent grain growth stage because of uniform grain growth. Recrystallised grains induced by a considerable amount of intermetallic compounds did not change the leading role of double twins on contribution to recrystallised texture. All results indicate that a small amount of Ca addition into a conventional Mg-Zn alloy system can significantly alter the recrystallised texture from basal texture to RE texture.

show abstract

“…In these cases a so-called "rare earth texture component" has been identified, often along with a <1121> pole parallel to ED, thus tilting basal planes out of ED. Geometrically, an easier activation of basal slip during mechanical testing parallel to ED is then realized and an increase in the ductility of these materials enabled (Stanford and Barnett, 2008b;Zhou et al, 2013;Jiang et al, 2016). However, in the case of extrusion of flat profiles (without the rotational symmetry) also such alloys tend to form strong textures even if the alignment of basal planes may not preferentially be parallel to the sheet plane (Gall et al, 2013;Bohlen et al, 2018a).…”

Section: Introductionmentioning

confidence: 99%

Processing Effects on the Formability of Extruded Flat Products of Magnesium Alloys

et al. 2019

View full text Add to dashboard Cite

The development of microstructure and texture during flat product extrusion of magnesium alloys differs significantly from those of rolled sheets. It has especially been shown that the range of microstructures and textures is broad in the case of extrusion which allows significant variations of the resulting textures. Three wrought magnesium-zinc alloys with texture modifying elements Nd (ZN10), Ca (ZX10), and Al (AZ31) have been used to extrude flat band profiles with varied processing parameters. This allowed a variation of grain sizes and textures of the extrudates. The impact on the mechanical properties and the forming behavior (Erichsen values IE) is revealed and discussed with respect to the microstructure and texture. It can be shown that a weak alignment of basal planes is preferred for enhanced formability over a distinct alignment of basal planes even if oriented preferentially for basal slip.

show abstract

Development of dilute Mg–Zn–Ca–Mn alloy with high performance via extrusion

Cited by 106 publications

References 53 publications

High-speed extrusion of dilute Mg-Zn-Ca-Mn alloys and its effect on microstructure, texture and mechanical properties

High-speed extrusion of dilute Mg-Zn-Ca-Mn alloys and its effect on microstructure, texture and mechanical properties

Effect of deformation twinning on crystallographic texture evolution in a Mg–6.6Zn–0.2Ca (ZX70) alloy during recrystallisation

Processing Effects on the Formability of Extruded Flat Products of Magnesium Alloys

Contact Info

Product

Resources

About