Effects of yttrium on microstructure and mechanical properties of hot-extruded Mg–Zn–Y–Zr alloys

Zhang, Ya; Zeng, Xiaoqin; Liu, Liufa; Lü, Chen; Zhou, Hantao; Li, Qiang; Zhu, Yue

doi:10.1016/j.msea.2004.02.007

Cited by 210 publications

(92 citation statements)

References 10 publications

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“…The W-phase remains stable until 470-480°C, very close to that reported for melting of W-phase in Mg-Zn-Y-Zr alloys [9,25].…”

Section: Characterization Of As-cast Alloyssupporting

confidence: 86%

“…Among these phases, the quasicrystalline I-phase with its quasiperiodic lattice structure has attracted a lot of attention because of its unique properties as high hardness, thermal stability, high corrosion resistance, low friction coefficient and strong bonding with the magnesium matrix [8][9][10][11][12][13][14]. Despite of the good properties of these new Mg alloys, an additional increase of strength is required to replace Al alloys in structural applications.…”

Section: Introductionmentioning

confidence: 99%

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Microstructural changes in an extruded Mg Zn Y alloy reinforced by quasicrystalline I-phase by small additions of calcium, manganese and cerium-rich mischmetal

Medina

Pérez

Garcés

et al. 2016

Materials Characterization

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“…The W-phase remains stable until 470-480°C, very close to that reported for melting of W-phase in Mg-Zn-Y-Zr alloys [9,25].…”

Section: Characterization Of As-cast Alloyssupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Microstructural changes in an extruded Mg Zn Y alloy reinforced by quasicrystalline I-phase by small additions of calcium, manganese and cerium-rich mischmetal

Medina

Pérez

Garcés

et al. 2016

Materials Characterization

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“…It is clearly confirmed that dynamic recrystallization occurred during hot extrusion. [20][21][22][23] The fine distributed second phase in Mg matrix can suppress the grain growth of recrystallized grains during hot extrusion process even at such high extrusion temperature 380 C.…”

Section: Microstructure Of the As-extruded Alloysmentioning

confidence: 99%

Microstructure and Mechanical Properties of Mg-Al-Ca-Nd Alloys Fabricated by Gravity Casting and Extrusion Process

Son

Lee

et al. 2008

Mater. Trans.

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The as-cast microstructure of Mg-5Al-3Ca-xNd alloys consists of equiaxed -Mg matrix, (Mg, Al) 2 Ca eutectic phase and Al-Nd rich intermetallic compounds. With the increase of Nd addition, -Mg matrix morphology was changed from dendritic to equiaxed grains due to suppression of grain growth by formation of homogeneous intermetallic compounds containing Nd dispersed at grain boundary and -Mg matrix. And the grain size of as-cast alloys was decreased as addition of Nd was increased. This eutectic phase of the extruded alloys was elongated to extrusion direction and size of this phase was redined comparing to that of as-cast alloys because of severe deformation during hot extrusion. Maximum yield and ultimate tensile strength value of the as-extruded alloys was 322 and 335 MPa at Mg-5Al-3Ca-2Nd alloy, respectively.

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“…2,4,[17][18][19][20][21][22][23] Nd has similar roles to Y in Mg-Zn-Zr alloys and can partially replace Y in the Mg-Zn-Y ternary phases. 24) So for the Nd-containing Mg-Zn-Y alloys, such as the ZW21 alloy, the Zn/Y ratio should be Zn/RE (RE includes Y and Nd).…”

Section: Introductionmentioning

confidence: 99%

Effects of Nd or Zr Addition on Microstructure and Mechanical Properties of As-Cast Mg-Zn-Y Alloy

et al. 2016

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The effects of Nd or Zr addition on microstructure and mechanical properties of casting Mg-Zn-RE alloy have been investigated. The results indicate that the optimum contents of Nd and Zr are 0.5% and 0.3% respectively. The less or higher contents all increase grain size and accelerate the formation of shrinkage porosity, and thus decrease tensile properties and change fracture regime from transgranular mode to intergranular mode during tensile tests. The Mg-Zn-RE ternary phases transform from W (Mg 3 Zn 3 (Nd,Y) 2 ) in turn into W + Z (Mg 12 Zn(Nd,Y)) and Z as the Nd content increases and their distribution gradually changes from small discontinuous lath form to continuous network form. The grain bonding strength of an alloy with a certain amount of W phase that distributes in a discontinuous form is high than that of the alloy with the Z phase, and thus the W phase is an ideal strengthening phase. The alloy with 0.5 Nd and 0.3% Zr, named ZW21 alloy, has the smallest grains and highest grain bonding strength, and so has the highest comprehensive mechanical properties.

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Effects of yttrium on microstructure and mechanical properties of hot-extruded Mg–Zn–Y–Zr alloys

Cited by 210 publications

References 10 publications

Microstructural changes in an extruded Mg Zn Y alloy reinforced by quasicrystalline I-phase by small additions of calcium, manganese and cerium-rich mischmetal

Microstructural changes in an extruded Mg Zn Y alloy reinforced by quasicrystalline I-phase by small additions of calcium, manganese and cerium-rich mischmetal

Microstructure and Mechanical Properties of Mg-Al-Ca-Nd Alloys Fabricated by Gravity Casting and Extrusion Process

Effects of Nd or Zr Addition on Microstructure and Mechanical Properties of As-Cast Mg-Zn-Y Alloy

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