The effect of different content of Al, RE and Si element on the microstructure, mechanical and creep properties of Mg–Al alloys

Asl, Kaveh Meshinchi; Tari, Alireza; Khomamizadeh, Farzad

doi:10.1016/j.msea.2009.06.048

Cited by 68 publications

(10 citation statements)

References 13 publications

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“…The addition of other elements like, for example, Ca, Zn, Mn, Si, and REEs can improve some of the properties of Mg–Al alloys . The addition of Ca to the Mg–Al alloy AZ91 refined the microstructure and increased the thermal stability of the β‐phase, thus resulting in the improvement of yield strength and creep resistance .…”

Section: Mg and Its Alloysmentioning

confidence: 99%

“…The addition of Zn to Mg–Al resulted in the enhanced corrosion resistance . The addition of Si to AZ91 showed an increase in the creep resistance and tensile strength at elevated temperature, while the content of Al showed improvement in mechanical properties only at room temperature . Studies have proved that the additions of the REEs to the Mg alloys enhance the creep resistance of these alloys …”

Section: Mg and Its Alloysmentioning

confidence: 99%

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The current trends of Mg alloys in biomedical applications—A review

2018

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Magnesium (Mg) has emerged as an ideal alternative to the permanent implant materials owing to its enhanced properties such as biodegradation, better mechanical strengths than polymeric biodegradable materials and biocompatibility. It has been under investigation as an implant material both in cardiovascular and orthopedic applications. The use of Mg as an implant material reduces the risk of long-term incompatible interaction of implant with tissues and eliminates the second surgical procedure to remove the implant, thus minimizes the complications. The hurdle in the extensive use of Mg implants is its fast degradation rate, which consequently reduces the mechanical strength to support the implant site. Alloy development, surface treatment, and design modification of implants are the routes that can lead to the improved corrosion resistance of Mg implants and extensive research is going on in all three directions. In this review, the recent trends in the alloying and surface treatment of Mg have been discussed in detail. Additionally, the recent progress in the use of computational models to analyze Mg bioimplants has been given special consideration.

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Section: Mg and Its Alloysmentioning

confidence: 99%

Section: Mg and Its Alloysmentioning

confidence: 99%

The current trends of Mg alloys in biomedical applications—A review

2018

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“…Figure 3(b) shows the micrograph of β-Mg 17 Al 12 which has two kinds of morphologies, the laminar shaped one surrounding the irregular massive one[30]. Combining with the XRD patterns in figure 4 and the EDS results of B infigure 3(d), the needle-like phase shown in figure 3(a) could be deduced as Al 11 RE 3 (Al 11 La 3 , Al 11 Nd 3 )[31].…”

mentioning

confidence: 86%

Effect of La/Nd ratio on microstructure and mechanical properties of as-cast AZ91-xLa/Nd alloy

Cui

et al. 2020

Mater. Res. Express

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The effect of La/Nd ratio on microstructure and mechanical properties of as-cast AZ91D alloys were investigated. The alloys were produced by casting the molten metal into a preheated steel mould. Microstructures were investigated by XRD and SEM (equipped with EDS). The hardness measurement was carried out by Brinell hardness (HB) digital display tester. Compression tests were conducted at both room and high temperatures (20°C and 150°C). Microstructural characterizations reveal that the area fraction of the β-Mg 17 Al 12 phase changed with the variation of La/Nd ratio. The area fraction of the β-Mg 17 Al 12 phase decrease significantly and then increased slightly with the increase of La/Nd ratio. Besides, the results show that the addition of La and Nd contributed to the formation of needle-like phase Al 11 RE 3 . Meanwhile, the Brinell hardness and high-temperature compression properties of this alloy reach the maximum values (67 HB and 330 MPa, respectively) when the La/Nd ratio is 2/3. In this alloy, the amount of Al 11 RE 3 phase is 51/TA and the average length is 69.55 μm. Moreover, a generation model of Al 11 RE 3 is established and the growth mechanism of Al 11 RE 3 is analyzed. This work thus has proved that La/Nd ratio has a great effect on the microstructure and mechanical properties of AZ91.

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“…Number of studies have been conducted to identify the creep mechanism in the AZ91 Mg alloy. Yusuke Nakaura et al [13] studied the creep performance of [22] reported the stress exponent n = 5.7 for AZ91 Mg alloy, which is in the range of dislocation climb mechanism; however, the activation energy (Q) was measured 119 kJ/mol, which lies between self-diffusion and grain boundary diffusion. Squeeze casting is beneficial over conventional die casting because of several reasons as discussed previously.…”

Section: Introductionmentioning

confidence: 99%

“…This value of activation energy lies in between the activation energy for grain boundary diffusion or cross slip for Mg alloy deformed by grain boundary sliding and lattice self-diffusion for Mg alloy deformed by dislocation climb. At lower stresses, Kaveh Meshinchi Asl [22] reported the stress exponent n = 5.7 for AZ91 Mg alloy, which is in the range of dislocation climb mechanism; however, the activation energy (Q) was measured 119 kJ/mol, which lies between self-diffusion and grain boundary diffusion.…”

Section: Introductionmentioning

confidence: 99%

Creep deformation study of squeeze cast AZ91 magnesium alloy

Patil

Jain

Marodkar

et al. 2023

Materials Science and Technology

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The AZ91 magnesium alloy has excellent mechanical properties; however, its application is limited by its poor creep resistance. In this study, AZ91 magnesium alloy prepared by squeeze casting technique has been tested for its creep performance at varying stresses and temperatures. The governing creep mechanism was examined in the wake of deformation. The microstructure for as-cast AZ91 alloy confirmed the massive dendritic β-Mg17Al12 phase. The creep study indicated that the governing creep mechanisms were dislocation creep and dislocation climb governed by lattice diffusion in the test regime of 50 MPa stress at 150oC to 175oC. The measured dislocation density values showed good agreement with the expected dislocation density in the power law creep mechanism.

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The effect of different content of Al, RE and Si element on the microstructure, mechanical and creep properties of Mg–Al alloys

Cited by 68 publications

References 13 publications

The current trends of Mg alloys in biomedical applications—A review

The current trends of Mg alloys in biomedical applications—A review

Effect of La/Nd ratio on microstructure and mechanical properties of as-cast AZ91-xLa/Nd alloy

Creep deformation study of squeeze cast AZ91 magnesium alloy

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