Comparative study on the microstructure and mechanical properties of Mg-Li-Al based alloys with yttrium and strontium addition

Xu, Tiancai; Peng, Xiaodong; Jiang, Junwei; Xie, Weidong; Chen, Yuanfang; Zhang, Xi

doi:10.1007/s11595-015-1201-y

Cited by 2 publications

(2 citation statements)

References 19 publications

(17 reference statements)

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“…Ali et al [4] estimated that restriction of grains growth of separated RE elements in front of growing liquid/solid interface is the principal purpose of the grain refinement. That hypothesis was based on the research of RE-containing intermetallic phases on the grain boundaries of the cast alloy [11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Refinement effect of RE in light weight Mg–Li–Al alloys

Król

Staszuk

Mikuszewski

et al. 2018

J Therm Anal Calorim

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The effect of 2 mass% rare earth elements (RE) as in mischmetal state on the structure, thermal behaviour and mechanical properties of Mg-xLi-4Al (x = 4, 8 and 12 by mass percentage). The thermo-derivative analysis was implemented using the UMSA platform (Universal Metallurgical Simulator and Analyzer) with cooling rate approx. & 0.6°C s -1 that correspond to natural cooling. Microstructural evaluations were identified by X-ray diffraction, scanning electron microscopy, light microscope and energy-dispersive X-ray spectroscopy. Obtained results from the thermal derivative analysis allowed determining the solidification pathways for Mg-Li-Al-RE alloy. The addition of grain refinement causes changes in crystallisation process. The addition of RE elements affected an enhancement in mechanical properties, which was associated with the development of intermetallic compounds; the maximum increases in hardness at level 240% was observed for single a-phase alloy and at level 19% for a ? b alloy.

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Section: Introductionmentioning

confidence: 99%

Refinement effect of RE in light weight Mg–Li–Al alloys

Król

Staszuk

Mikuszewski

et al. 2018

J Therm Anal Calorim

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“…However, the binary Mg-Li alloys cannot meet the industrial strength requirements [10]. The addition of alloying elements to Mg-Li alloys was considered as an effective method to improve the strength of Mg-Li alloys due to its easy operation and cost-saving [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Grain Refinement Mechanism of the As-Cast and As-Extruded Mg–14Li Alloys with Al or Sn Addition

Zeng

Jiang

et al. 2017

Metals

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Abstract:The microstructures of the as-cast and as-extruded Mg-14 wt. % Li-1 wt. % Al (LA141) and Mg-14 wt. % Li-2 wt. % Sn (LT142) were observed by optical and scanning electron microscope (SEM), X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The effects of Al and Sn on the grain refinement on the Mg-14Li alloy were investigated. In addition, the mechanism of grain refinement on the as-cast and as-extruded alloys was discussed from the view of the solute effect and heterogeneous nucleation effect via edge-to-edge matching model. The results showed that the average grain sizes of the as-cast LA141 and LT142 alloys were similar due to the close solute effect of 1.1 wt. % Al and 1.8 wt. % Sn, while, in the as-extruded alloys, the average grain size of LT142 was over two times finer than that of LA141. This was attributed to the reason that Li 2 MgSn particles can serve as heterogeneous nucleation sites for the β-Li matrix during the process of dynamic recrystallization (DRX), but LiMgAl 2 cannot serve the same way. Therefore, Sn can act as a more effective grain refiner for the Mg-14Li alloy compared to Al.

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Comparative study on the microstructure and mechanical properties of Mg-Li-Al based alloys with yttrium and strontium addition

Cited by 2 publications

References 19 publications

Refinement effect of RE in light weight Mg–Li–Al alloys

Refinement effect of RE in light weight Mg–Li–Al alloys

Grain Refinement Mechanism of the As-Cast and As-Extruded Mg–14Li Alloys with Al or Sn Addition

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