Effect of Zn on the microstructure and mechanical properties of as-cast Mg–7Gd–3Y–1Nd–0.5Zr alloy

Li, M.; Zhang, K.; Li, X.G.; Yuan, Jiawei; Li, Y.J.; Ma, Minglong; Shi, Guoliang; Li, T.; Liu, J.B.

doi:10.1016/j.msea.2015.04.056

Cited by 13 publications

(3 citation statements)

References 24 publications

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“…In the point of plastic instability, the Alloy IV shows the largest strain hardening ability while the Alloy I exhibits the lowest strain hardening ability. Figure 6 compares the ultimate tensile strength s UTS ( ) and elongation d ( ) of present as-cast Mg-2.5Y-1Ce-0.5Mn-xZn (x=0, 1, 3, 5 wt%) alloys with the published results of tensile tests in other as-cast Mg-RE or Mg-RE-Zn alloys [10,16,[19][20][21][22][23][24][25][26][27][28][29][30]. It is notable that the other as-cast alloys exhibit various s UTS values in a wide range while most of their d values are lower than 8%.…”

Section: Tensile Properties and Strain Hardening Behaviorsmentioning

confidence: 98%

Effect of Zn addition on the microstructures and mechanical behaviors of As-cast Mg-2.5Y-1Ce-0.5Mn alloy

Zhang

Sun

Liu

et al. 2020

Mater. Res. Express

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The effect of Zn addition on the microstructures and mechanical behaviors of as-cast Mg-2.5Y-1Ce-0.5Mn alloy was investigated. Microstructure observation demonstrated that with the addition of 1wt%, 3wt% and 5wt% Zn, the ternary phases of LPSO phase, LPSO phase +W-phase and W-phase +T-phase (Mg-Zn-Ce) are precipitated orderly, and the volume fraction of eutectic phases increases. The results of tensile tests demonstrated that with increasing Zn addition, the yield strength s YS ( )of as-cast alloys increases continuously while the ultimate tensile strength s UTS ( )and elongation d ( ) increase nonlinearly. Based on the analysis of microstructure, nanoindentation results and deformation surfaces, it found that the s YS is increased by the increased volume fraction of hard ternary phases. The largest d in 1wt% Zn alloy is contributed from the LPSO phase with an excellent plastic accommodation while the insufficient accommodated role of LPSO phase and the easily broken W-phase deteriorate the ductility of 3wt% Zn alloy. The hard and brittle T-phase also damages the ductility, while the fine grains contribute to the moderate elongation in 5wt% Zn alloy. The s UTS mainly arises from a sustainable increase of strain hardening ability after yielding that associated with both the high yielding point and excellent ductility.

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Section: Tensile Properties and Strain Hardening Behaviorsmentioning

confidence: 98%

Effect of Zn addition on the microstructures and mechanical behaviors of As-cast Mg-2.5Y-1Ce-0.5Mn alloy

Zhang

Sun

Liu

et al. 2020

Mater. Res. Express

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“…Combined with XRD and composition, both the A and C phases are Mg 3 Zn 3 Y 2 . The gray contrast phase (marked as "B") is mainly composed of Mg, Y, and Zn elements, and the atomic ratios of Y to Zn are close to 1:1; this phase is indicated to be the LPSO phase [16]. In addition, lamellar phases can be seen within the crystal; they are lamellar LPSO phases (14H-LPSO) formed via the heat treatment process [17].…”

Section: Microstructure Prior To Forgingmentioning

confidence: 99%

Dynamic Recrystallization, Texture Evolution, and Improved Mechanical Properties of Mg-Y-Zn-V Alloy during Forging and Subsequent Extruding Deformation

Liu,

Zhang,

Shi

et al. 2024

Metals

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In this paper, the electron backscatter diffraction (EBSD) technique was used to analyze the dynamic recrystallization (DRX), twinning, slip behavior, and texture evolution during forging and subsequent extruding deformation. The results show that, as the degree of strain increased (forging to extruding), the degree of DRX increased, and the DRX mechanism changed from discontinuous DRX (DDRX) during forging to DDRX and continuous DRX (CDRX) during extruding. Particle stimulation nucleation (PSN) promoting DRX occurred during deformation. The deformation process mainly produced {10–12} twins (TTW) and played a role in coordinating the deformation. The slip behavior also changed according to an analysis of in-grain misorientation axes (IGMA) results, changing from slip-dominated with a basal <a> slip to co-dominated with multiple slip modes, with the activation of mainly prismatic <a> and pyramidal <c+a> slip. Meanwhile, the strong basal texture at the beginning of the deformation also changed, and the texture strength decreased from 24.81 to 15.56. The weakening of the texture was mainly due to the formation of DRX grains and twins, as the newly formed DRX and twins reoriented. In the later stages of deformation, the activation of prismatic <a> slip and pyramidal <c+a> slip changed the basal texture component. Based on microstructural analysis, the improvement in mechanical properties was due to fine-grain strengthening and load-transfer strengthening. The ultimate tensile strength (UTS) was 370.5 MPa, the yield strength (YS) was 340.1 MPa, and the elongation (EL) was 15.6%.

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“…The mechanical properties of the alloy are closely related to its microstructure. For the as-cast alloy, there was a large amount of reticular eutectic Mg 3 RE phase, which is hard, brittle, and not coherent with the α-Mg matrix [41]. It is easy for stress to concentrate in the coarse reticular phase during deformation and reduce the alloy's mechanical properties; thus, the as-cast alloy showed reduced strength and poor plasticity.…”

Section: Relevance Between Tensile Properties and Mechanical Propertiesmentioning

confidence: 99%

Strengthening of Mg Alloy with Multiple RE Elements with Ag and Zn Doping via Heat Treatment

et al. 2023

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Strengthening Mg alloys with rare earth elements has been a research focus for several decades. To minimize the usage of rare earth elements while enhancing mechanical properties, we adopted the strategy of alloying with multiple rare earth elements, namely Gd, Y, Nd, and Sm. Additionally, to promote the precipitation of basal precipitate, Ag and Zn doping was also induced. Thus, we designed a new cast Mg-2Gd-2Y-2Nd-2Sm-1Ag-1Zn-0.5Zr (wt.%) alloy. The microstructure of the alloy and its relevance to mechanical properties in various heat treatment conditions were investigated. After undergoing a heat treatment process, the alloy demonstrated exceptional mechanical properties, with a yield strength of 228 MPa and an ultimate tensile strength of 330 MPa achieved through peak-aging for 72 h at 200 °C. The excellent tensile properties are due to the synergistic effect of basal γ″ precipitate and prismatic β′ precipitate. In its as-cast state, its primary mode of fracture is inter-granular, whereas in the solid-solution and peak-aging conditions, the predominant mode of fracture is a mixture of trans-granular and inter-granular fractures.

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Effect of Zn on the microstructure and mechanical properties of as-cast Mg–7Gd–3Y–1Nd–0.5Zr alloy

Cited by 13 publications

References 24 publications

Effect of Zn addition on the microstructures and mechanical behaviors of As-cast Mg-2.5Y-1Ce-0.5Mn alloy

Effect of Zn addition on the microstructures and mechanical behaviors of As-cast Mg-2.5Y-1Ce-0.5Mn alloy

Dynamic Recrystallization, Texture Evolution, and Improved Mechanical Properties of Mg-Y-Zn-V Alloy during Forging and Subsequent Extruding Deformation

Strengthening of Mg Alloy with Multiple RE Elements with Ag and Zn Doping via Heat Treatment

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