Extensive dynamic recrystallized grains at kink boundary of 14H LPSO phase in extruded Mg92Gd3Zn1Li4 alloy

Liu, Wei; Zhang, Jinshan; Wei, Li-yun; Xu, Chunxiang; Zong, Ximei; Hao, Jianqiang

doi:10.1016/j.msea.2016.10.120

Cited by 36 publications

(5 citation statements)

References 21 publications

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“…The demand for lightweight as well as high strength material for aerospace and automobile industries has been increasing day by day. This has made magnesium alloys more attractive as their density is lower than aluminium and have superior damping capacity with high speci c strength [1,2]. However, pure Mg has poor formability, toughness, creep strength and high ammability that inhibit their industrial applications.…”

Section: Introductionmentioning

confidence: 99%

“…Alloying is a commonly used approach to improve the mechanical properties of magnesium. The alloying elements strengthen magnesium through various strengthening mechanisms such as solid solution strengthening and precipitation hardening [3] by secondary phase formation [1][2][3][4][5][6][7][8]. Recently, it was reported that Mg alloys containing Zn, RE (Gadolinium), and Zr exhibit superior mechanical properties when compared to pure Mg [9].…”

Section: Introductionmentioning

confidence: 99%

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WITHDRAWN: Effect of equal channel angular pressing route and temperature on the mechanical behavior of ZE41 Mg alloy

Chiranth¹,

Siddaraju²,

Sevvel³

et al. 2021

Preprint

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A commercial ZE41 Mg alloy was processed by equal channel angular pressing (ECAP) using route BC (90o sample rotation after each pass) and route C (180o sample rotation after each pass) at 250, 300 and 350 oC for up to 4 passes. Significant grain refinement from ∼150 μm to ∼33 μm occurred at the higher third and fourth ECAP passes. The most effective process among all routes and temperature combinations was via route C at 250 oC. Nearly 83% increase in yield strength, 58% increase in ultimate tensile strength, and 107% increase in fracture strain were observed after 4 ECAP passes using route C at 250 oC. The increase in the strength of the alloy was attributed to grain refinement during static and dynamic recrystallization. Fractography of tensile samples showed that shallow dimples change to fine dimples at higher passes modifying the failure mode from cleavage to ductile fracture.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Effect of equal channel angular pressing route and temperature on the mechanical behavior of ZE41 Mg alloy

Chiranth¹,

Siddaraju²,

Sevvel³

et al. 2021

Preprint

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“…However, for most LPSO strengthened Mg-RE-Zn-based alloys [15][16][17], the LPSO mainly appears as a thin slice in the alternate Mg matrix and forms a LPSO/Mg structure. This multi-layered LPSO/Mg structure deforms in a combined manner [12,18] and influences the recrystallisation behaviour of Mg [19][20][21][22][23][24]. For example, the Mg matrix in the interior of the LPSO phase was reported to deform in a similar manner to the kinking of the surrounding LPSO [12,18].…”

Section: Introductionmentioning

confidence: 99%

Kink boundaries and their role in dynamic recrystallisation of a Mg-Zn-Y alloy

Ikeda

Shi

et al. 2019

Materials Characterization

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“…Among various types of LPSO structures, 18R and 14H LPSO phases are two commonly observed in Mg-RE-Zn alloys, which contributed to the improved mechanical properties of these alloys [12,18]. At present, lots of efforts have been made to break through the strength limit of magnesium alloys by clarifying the strengthening mechanism of LPSO phase, tailoring the morphology and distribution of LPSO phases and combining LPSO strengthening with other strengthening factors [18][19][20][21][22][23][24][25][26]. Inspiringly, the introducing of LPSO phase with coherent nano precipitates (β' and/or γ' phase) has been successfully employed in Mg-Y-Zn, Mg-Gd-Zn and Mg-Gd-Y-Zn alloys, which showed enhanced mechanical properties with high strength and moderate elongation [18,23,24].…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Two Aging Treatments on Microstructure and Mechanical Properties of an Ultra-Fine Grained Mg-10Y-6Gd-1.5Zn-0.5Zr Alloy

Liu

Huang

et al. 2018

Metals

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Developing high strength and high ductility magnesium alloys is an important issue for weight-reduction applications. In this work, we explored the feasibility of manipulating nanosized precipitates on LPSO-contained (long period stacking ordered phase) ultra-fine grained (UFG) magnesium alloy to obtain simultaneously improved strength and ductility. The effect of two aging treatments on microstructures and mechanical properties of an UFG Mg-10Y-6Gd-1.5Zn-0.5Zr alloy was systematically investigated and compared by a series of microstructure characterization techniques and tensile test. The results showed that nano γ" precipitates were successfully introduced in T5 peak aged alloy with no obvious increase in grain size. While T6 peak aging treatment stimulated the growth of α-Mg grains to 4.3 µm (fine grained, FG), together with the precipitation of γ" precipitates. Tensile tests revealed that both aging treatments remarkably improved the strengths but impaired the ductility slightly. The T5 peak aged alloy exhibited the optimum mechanical properties with ultimate strength of 431 MPa and elongation of 13.5%. This work provided a novel strategy to simultaneously improve the strength and ductility of magnesium alloys by integrating the intense precipitation strengthening with ductile LPSO-contained UFG/FG microstructure.

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Extensive dynamic recrystallized grains at kink boundary of 14H LPSO phase in extruded Mg92Gd3Zn1Li4 alloy

Cited by 36 publications

References 21 publications

WITHDRAWN: Effect of equal channel angular pressing route and temperature on the mechanical behavior of ZE41 Mg alloy

WITHDRAWN: Effect of equal channel angular pressing route and temperature on the mechanical behavior of ZE41 Mg alloy

Kink boundaries and their role in dynamic recrystallisation of a Mg-Zn-Y alloy

Comparative Study of Two Aging Treatments on Microstructure and Mechanical Properties of an Ultra-Fine Grained Mg-10Y-6Gd-1.5Zn-0.5Zr Alloy

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