Effect of strontium on the grain refining efficiency of Mg–3Al alloy refined by carbon inoculation

Du, Jun; Yang, Jian; Kuwabara, Mamoru; Li, Wenfang; Peng, Jihua

doi:10.1016/j.jallcom.2008.03.012

Cited by 44 publications

(31 citation statements)

References 27 publications

(44 reference statements)

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“…26,27) Judged by Fig. 1, much higher refining efficiency could be obtained for the samples of the AZ31 alloy modified by 0.2 mass%C combined with either 0.2 mass%Ca or 0.2 mass%Sr, compared to the other samples of the AZ31 alloy modified separately by 0.2 mass%C, 0.2 mass%Ca and 0.2 mass%Sr.…”

Section: Sem Observation Of Al-c-o Particlesmentioning

confidence: 80%

“…In the authors' previous studies, [26][27][28][29] the Al-C-O particles were observed in the samples of the Mg-3Al alloy modified either by 0.2 mass%C or by the combination of 0.2 mass%C and alkaline earth elements. In the Al-C-O particles, the alkaline earth elements were hardly detected by EDS when the addition contents of Ca or Sr were less than 0.2 mass%.…”

Section: Sem Observation Of Al-c-o Particlesmentioning

confidence: 88%

“…20) Recently, the authors reported that the higher grain refining efficiency could be obtained for the Mg-3Al alloy modified by the combination of carbon and alkaline earth elements Ca or Sr due to the synergistic action of more potent nuclei and higher constitutional undercooling. 26,27) In the present study, the AZ31 alloy was used and the following research works have been carried out to clarify: (1) whether the high grain refinement could also be obtained for the AZ31 alloy which was modified by the combination of carbon and alkaline earth elements Ca or Sr; (2) how mechanical properties change for the AZ31 alloy which was modified with only carbon and alkaline earth elements Ca or Sr, as well as the combination of carbon and alkaline earth elements. The ultimate purpose is that some important data were provided to develop a suitable and reliable grain refiner to be applied for the Mg-Al alloys.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Carbon and/or Alkaline Earth Elements on Grain Refinement and Tensile Strength of AZ31 Alloy

Yang

Kuwabara

et al. 2008

Mater. Trans.

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The effects of carbon and/or alkaline earth elements Ca and Sr on the grain refinement and tensile properties of the AZ31 alloy have been investigated in the present study. A significant grain refining efficiency could be obtained for the AZ31 alloy modified by carbon inoculation and the grain refining efficiency could be further improved by the combination of 0.2 mass%C and alkaline earth elements of 0.2 mass%Ca or 0.2 mass%Sr. Compared to the AZ31 alloy without any treatment, the tensile properties of the AZ31 alloy were remarkably improved after being modified by the combination of carbon and a little addition of alkaline earth elements. The ultimate tensile strength and elongation to failure were improved by about 20% and 40%, respectively. After being refined either by 0.2 mass%C or by the combination of 0.2 mass%C and a little addition of alkaline earth elements (0.2 mass%Ca or 0.2 mass%Sr), the main fracture mechanism was changed from cleavage mode with large cleavage planes for the unrefined AZ31 alloy to mixed mode of cleavage and quasi-cleavage fracture. The fracture surfaces were almost composed of small cleavage planes with thin river patterns and quasi-cleavage planes with small dimples and severe plastic deformation.

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Section: Sem Observation Of Al-c-o Particlesmentioning

confidence: 80%

Section: Sem Observation Of Al-c-o Particlesmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

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Effects of Carbon and/or Alkaline Earth Elements on Grain Refinement and Tensile Strength of AZ31 Alloy

Yang

Kuwabara

et al. 2008

Mater. Trans.

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“…The mechanical and physical properties are not the greatest advantages of pure Mg; however, they can both be improved by structural unit refinement and the addition of alloying elements [6].…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Characterisation of a Newly Developed Mg–Dy–Al–Zn–Zr Alloy Structure

Kunčická

Kocich

2018

Metals

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This is a report on the structure phases and precipitates in a newly developed Mg-10Dy-3Al-1Zn-0.2Zr alloy. Specimens from the cast alloy were heat treated at temperatures of 480 • C, 520 • C and 560 • C, all for 8 and 16 h, and subsequently quenched. The structures were then analysed using scanning and transmission electron microscopy, while the mechanical properties were investigated using microhardness measurements. The results showed the different temperatures, as well as times, influence both the chemical composition and morphology of the precipitated phases. The occurrence of the β-phase changed with increasing temperature and time from grain boundary segregations through fine elongated particles to coarse plate-like precipitates. Polygon-shaped Dy-rich precipitates were observed in all the samples; however, their size decreased and their distribution homogenised with increasing annealing temperature and time. The samples annealed at 520 • C and 560 • C exhibited the presence of lamellar 18R-type long period stacking ordered (LPSO) phases. Microhardness measurements were in accordance with results of the microscopic analyses; although the values varied between 60 and 65 HV for all the material states, the most uniform distribution was observed for the 560 • C/8-h sample, which featured the finest precipitates and LPSO phases.

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“…Significant research has been conducted investigating grain refinement of Mg-Al alloys, such as melt superheating technique, the Elfinal processes, carbon inoculation, deliberate addition of alloying elements and other inoculants [3][4][5][6][7][8][9][10][11]. Among these work, carbon inoculants are considered to be the most effective grain refiner for Mg-Al alloys, and have been used for decades.…”

Section: Introductionmentioning

confidence: 99%

The Effects of ZnO Particles on the Grain Refinement and Mechanical Properties of AZ31 Magnesium Alloys

Liu

Zhang

et al. 2016

Trans Indian Inst Met

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The grain refinement and mechanical properties of AZ31 alloy with ZnO additions were investigated using suction casting method. ZnO addition could provide a more pronounced grain refinement and strengthening effects to the AZ31 alloy than Zn solute addition did. The grain size were well refined from 325 to 220 lm with 1.3 wt% ZnO addition. The grain refining mechanism of ZnO particles (*200 nm) mainly arose from the transformed Zn solute restricting the grain growth and the micro convection by the reaction enthalpy clearing solute suppressed nucleation effects. Meanwhile, the ZnO addition provided uniform solute field and steadly ensured a fine-grain and uniform second phase distribution. With 1.3 wt% ZnO addition, the ultimate tensile strength and yielding tensile strength of suction cast AZ31 alloy were as high as 205 and 66 MPa, respectively. The refining and strengthening mechanism have been discussed in detail.

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Effect of strontium on the grain refining efficiency of Mg–3Al alloy refined by carbon inoculation

Cited by 44 publications

References 27 publications

Effects of Carbon and/or Alkaline Earth Elements on Grain Refinement and Tensile Strength of AZ31 Alloy

Effects of Carbon and/or Alkaline Earth Elements on Grain Refinement and Tensile Strength of AZ31 Alloy

Comprehensive Characterisation of a Newly Developed Mg–Dy–Al–Zn–Zr Alloy Structure

The Effects of ZnO Particles on the Grain Refinement and Mechanical Properties of AZ31 Magnesium Alloys

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