Hot deformation behavior and microstructure evolution of Mg-Gd-Y(-Sm)-Zr alloys

Pang, Hao; Li, Quanan; Chen, Xiaoya; Chen, Peijun; Li, Xiangyu; Tan, Jinfeng

doi:10.1016/j.jallcom.2022.165937

Cited by 29 publications

(7 citation statements)

References 55 publications

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“…As the strain increases, the DRXed grains grow, and its average grain size gradually increases from ~10.6 to 13.9 µm, as seen in Figure 11e,f. Generally, the DRX process plays a key role in refining the grains and weakening the basal texture [43,45]. The DRX area shows a lower basal pole intensity than the whole one in the (0001) pole figures for the 0.3 and 0.5 strains (see Figure 11g,h).…”

Section: Hot Processing Map During Hot Compressionmentioning

confidence: 95%

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Establishment of Constitutive Model and Analysis of Dynamic Recrystallization Kinetics of Mg-Bi-Ca Alloy during Hot Deformation

Wang

Zhai

et al. 2022

Materials

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The flow behavior of the solution-treated Mg-3.2Bi-0.8Ca (BX31, wt.%) alloy was systematically investigated during hot compression at different deformation conditions. In the present study, the strain-related Arrhenius constitutive model and dynamic recrystallization (DRX) kinetic model were established, and the results showed that both two models had high predictability for the flow curves and the DRX behavior during hot compression. In addition, the hot processing maps were also made to confirm a suitable hot working range. Under the assistance of a hot processing map, the extrusion parameters were selected as 573 K and 0.5 mm/s. After extrusion, the as-extruded alloy exhibited a smooth surface, a fine DRX structure with weak off-basal texture and good strength–ductility synergy. The newly developed strong and ductile BX31 alloy will be helpful for enriching low-cost, high-performance wrought Mg alloy series for extensive applications in industries.

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Section: Hot Processing Map During Hot Compressionmentioning

confidence: 95%

“…In order to describe the DRX kinetics model, in general, the following equation can be used and expressed [43,44]:…”

Section: Drx Kinetics During Hot Compressionmentioning

confidence: 99%

Establishment of Constitutive Model and Analysis of Dynamic Recrystallization Kinetics of Mg-Bi-Ca Alloy during Hot Deformation

Wang

Zhai

et al. 2022

Materials

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“…Different twinning systems have been observed in deformed Mg and Mg alloys, and the most common one is the {1012} twinning system [18][19][20]. Theoretically, {1012} deformation twin has six equivalent variants denoted as Ti (i = 1 .…”

Section: Introductionmentioning

confidence: 99%

“…Different twinning systems have been observed in deformed Mg and Mg alloys, and the most common one is the twinning system [18-20]. Theoretically, deformation twin has six equivalent variants denoted as Ti (i = 1 … 6) and these multiple twin variants can be initiated simultaneously and interact with each other [21-24].…”

Section: Introductionmentioning

confidence: 99%

Loading-direction dependence of interaction types between different twin variants in AZ31 alloy

Luo

Zhang

et al. 2023

Materials Science and Technology

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In this research, Loading-direction dependence of interaction types between different [Formula: see text] twin variants in AZ31 alloy was investigated. The microstructure, twin evolution, and the deformation mechanisms of samples were characterised by quasi-in-situ electron backscatter diffraction. The result showed that during rolling direction (RD)-pre-compression and re-compression, the grains with co-zone twin–twin interaction (Type I) are in the majority, while during RD-pre-compression and transverse direction (TD)-re-compression, the grains with non-cozone twin–twin interaction (Type II) are dominant. Furthermore, the effect of different types of twin–twin interaction on subsequent microstructure evolution is clarified. Our experimental results may provide insights for tailoring different types of twin–twin interaction.

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“…The effect of samarium on magnesium alloys with yttrium and gadolinium was investigated in [35][36][37][38][39]. In works [35,36], alloys with a high content of gadolinium were considered.…”

Section: Introductionmentioning

confidence: 99%

Effect of Samarium on the Properties of Hot-Extruded Mg–Y–Gd–Zr Alloys

Lukyanova,

Martynenko,

Rybalchenko

et al. 2023

Crystals

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The effect of such an additional promising alloying element as samarium on hot-extruded Mg–Y–Gd–Zr alloys is investigated. The microstructure, kinetics of aging during the decomposition of a supersaturated Mg solid solution, and the mechanical properties of the alloys are studied. The differences of the recrystallization processes that occur in hot-extruded alloys with various contents of samarium (0, 1.7, 2.5%) are demonstrated. After hot extrusion, Mg–Y–Gd–Zr and Mg–Y–Gd–Sm–Zr alloys are additionally hardened during aging due to the decomposition of a supersaturated Mg solid solution. At the same time, samarium changes the nature of this hardening. The alloys with samarium are hardened faster, and the maximum hardness is achieved with shorter aging exposures. The mechanical properties of hot-extruded Mg–Y–Gd–Zr alloys with samarium addition are determined at room and elevated up to 300 °C temperatures. The efficiency and expediency of using samarium both as a separate alloying element and as a partial replacement of more expensive rare-earth elements in alloys with yttrium and gadolinium are shown.

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Hot deformation behavior and microstructure evolution of Mg-Gd-Y(-Sm)-Zr alloys

Cited by 29 publications

References 55 publications

Establishment of Constitutive Model and Analysis of Dynamic Recrystallization Kinetics of Mg-Bi-Ca Alloy during Hot Deformation

Establishment of Constitutive Model and Analysis of Dynamic Recrystallization Kinetics of Mg-Bi-Ca Alloy during Hot Deformation

Loading-direction dependence of interaction types between different twin variants in AZ31 alloy

Effect of Samarium on the Properties of Hot-Extruded Mg–Y–Gd–Zr Alloys

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