Effect of magnesium carbonate on microstructure and rolling behaviors of AZ31 alloy

Wang, Ling; Kim, Young Min; Lee, Je-hyun; You, Bong Sun

doi:10.1016/j.msea.2010.10.053

Cited by 19 publications

(3 citation statements)

References 28 publications

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“…Another effective approach to adding carbon, which may be less harmful than C 2 Cl 6 , is the use of carbonates, particularly MgCO 3 [77] and MnCO 3 , [50] although it may be the oxide-based as much as the C-based particles that enhance grain refinement. Direct carbon addition via a pulsating argon gas stream was reported by Yano et al.…”

Section: B Carbon-based Grain Refinersmentioning

confidence: 99%

Grain Refinement of Magnesium Alloys: A Review of Recent Research, Theoretical Developments, and Their Application

StJohn

Easton

Qian

et al. 2012

Metall Mater Trans A

216

114

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This paper builds on the ''Grain Refinement of Mg Alloys'' published in 2005 and reviews the grain refinement research on Mg alloys that has been undertaken since then with an emphasis on the theoretical and analytical methods that have been developed. Consideration of recent research results and current theoretical knowledge has highlighted two important factors that affect an alloy's as-cast grain size. The first factor applies to commercial Mg-Al alloys where it is concluded that impurity and minor elements such as Fe and Mn have a substantially negative impact on grain size because, in combination with Al, intermetallic phases can be formed that tend to poison the more potent native or deliberately added nucleant particles present in the melt. This factor appears to explain the contradictory experimental outcomes reported in the literature and suggests that the search for a more potent and reliable grain refining technology may need to take a different approach. The second factor applies to all alloys and is related to the role of constitutional supercooling which, on the one hand, promotes grain nucleation and, on the other hand, forms a nucleation-free zone preventing further nucleation within this zone, consequently limiting the grain refinement achievable, particularly in low solute-containing alloys. Strategies to reduce the negative impact of these two factors are discussed. Further, the Interdependence model has been shown to apply to a broad range of casting methods from slow cooling gravity die casting to fast cooling high pressure die casting and dynamic methods such as ultrasonic treatment.

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Section: B Carbon-based Grain Refinersmentioning

confidence: 99%

Grain Refinement of Magnesium Alloys: A Review of Recent Research, Theoretical Developments, and Their Application

StJohn

Easton

Qian

et al. 2012

Metall Mater Trans A

216

114

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show abstract

“…Carbon inoculation, as an effective grain refining method for Mg-Al based alloys, has been widely studied in the past decades [6][7][8][9][10][11][12][13]. One of the most commonly accepted grain refinement mechanisms of carbon inoculation is the Al 4 C 3 nucleus hypothesis, namely the idea that the Al 4 C 3 particles act as potent nucleation substrates for primary a-Mg grains [10,11,14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Al4C3 Particle Size Distribution in a Al–2.5C Master Alloy on the Refining Efficiency of the AZ31 Alloy

Zhao

Liu

Hai

2017

Acta Metall. Sin. (Engl. Lett.)

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The Al-2.5C master alloy is prepared to investigate the effect of the Al 4 C 3 particle size distribution on the refining efficiency of the AZ31 alloy. The results indicate that the Al 4 C 3 particles are potent nucleation substrates for primary a-Mg grains. With 1.0 wt% master alloy addition, the grain size is reduced from 204 to 70 lm. The grain refining efficiency of the Al 4 C 3 particles on the AZ31 alloy is calculated to be 0.04%-0.75%. Such low refining efficiency is mainly attributed to the size distribution of the Al 4 C 3 particles. The particle sizes are in the range from 0.18 to 7.08 lm, and their distribution is well fitted by a log-normal function. The optimum particle size range for significant grain refinement is proposed to be around 5.0-7.08 lm in the present conditions.

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“…)(CHOUDHARY et al, 1991;KHAN et al, 2001;MALYGIN, 2003a;CHENG;DEMOPOULOS, 2009;WANG et al, 2011;SASAKI;MORIYAMA, 2014; ZHAO; ZHU, 2014) ou hidrogenocarbonato (BOTHA;STRYDOM, 2001;VÁGVÖLGYI et al, 2008;HOLLINGBERY;HULL, 2010;HAN et al, 2011) a uma temperatura apropriada.…”

mentioning

confidence: 99%

Cerâmicas porosas moldáveis e autoligadas no sistema \'AL IND.2\'\'O IND.3\'-\'MG\'\'AL IND.2\'\'O IND.4\'

Arruda¹

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Effect of magnesium carbonate on microstructure and rolling behaviors of AZ31 alloy

Cited by 19 publications

References 28 publications

Grain Refinement of Magnesium Alloys: A Review of Recent Research, Theoretical Developments, and Their Application

Grain Refinement of Magnesium Alloys: A Review of Recent Research, Theoretical Developments, and Their Application

Effect of Al4C3 Particle Size Distribution in a Al–2.5C Master Alloy on the Refining Efficiency of the AZ31 Alloy

Cerâmicas porosas moldáveis e autoligadas no sistema \'AL IND.2\'\'O IND.3\'-\'MG\'\'AL IND.2\'\'O IND.4\'

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