Crystallographic study of grain refinement in aluminum alloys using the edge-to-edge matching model

Zhang, Mingxing; Kelly, P.M.; Easton, Mark; Taylor, J. A.

doi:10.1016/j.actamat.2004.11.037

Cited by 424 publications

(138 citation statements)

References 24 publications

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“…[25] The number of Al 3 BC particles N q was measured and the degree of asymmetry of a statistical distribution around its mean was quantified by its skewness b, which is defined by Eq. [4].…”

Section: Quantitative Analysismentioning

confidence: 99%

“…The in situ particles of TiB 2 , TiC, Al 2 O 3 , and MgAl 2 O 4 were shown to have close crystallographic matching with Al that possibly negates the influence of macro-scale wettability issue with Al. [2,4] This research is directed toward in situ synthesis of Al 3 BC phase in an Al-B-C alloy. Al 3 BC has been identified as a promising material of high hardness and toughness as well as of high chemical and thermal stability.…”

Section: Introductionmentioning

confidence: 99%

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Development of Al-B-C Master Alloy Under External Fields

Joshi

VadakkeMadam

Eskin

et al. 2015

Metall Mater Trans A

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This study investigates the application of external fields in the development of an Al-B-C alloy, with the aim of synthesizing in situ Al 3 BC particles. A combination of ultrasonic cavitation and distributive mixing was applied for uniform dispersion of insoluble graphite particles in the Al melt, improving their wettability and its subsequent incorporation into the Al matrix. Lower operating temperatures facilitated the reduction in the amount of large clusters of reaction phases, with Al 3 BC being identified as the main phase in XRD analysis. The distribution of Al 3 BC particles was quantitatively evaluated. Grain refinement experiments reveal that Al-B-C alloy can act as a master alloy for Al-4Cu and AZ91D alloys, with average grain size reduction around 50 pct each at 1 wt pctAl-1.5B-2C additions.

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Section: Quantitative Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of Al-B-C Master Alloy Under External Fields

Joshi

VadakkeMadam

Eskin

et al. 2015

Metall Mater Trans A

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“…During the extrusion, the intermetallic compounds may play a key role in the change of microstructure. ZHANG et al showed that an intermetallic compound can be the grain refi ner for a metal matrix when the crystallography mismatch of the close or near close packed planes between the compound and the metal matrix is less than 10% [13,14] . From the XRD results, the potential matching planes among Al 2 Y, Al 4 Sr and β-Li can be obtained.…”

Section: Microstructures Of Alloymentioning

confidence: 99%

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

Peng

Jiang

et al. 2015

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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The effects of yttrium and strontium on the microstructure and mechanical properties of Mg11Li-3Al magnesium alloy (LA113) are compared and analyzed. Microstructures and phases of the alloys were studied with optical microscope (OM), scanning electron microscope (SEM), X-ray diffractometer (XRD) and energy dispersive spectrometer (EDS). Mechanical properties of alloys were measured with tensile tester. The results show that yttrium and/or strontium additions produce a strong grain refi ning effect in LA113 alloy. Al 2 Y and Al 4 Sr, etc. phases with different morphologies are verifi ed and exist inside the grain or at the grain boundaries, which directly impact on the mechanical properties of LA113 alloy. The results of tensile tests show that, the as-extruded LA113-1Y-1Sr alloy obtains the optimal tensile property of which the tensile strength and elongation are 253.56 MPa and 18.12%, the tensile strength is increased by almost 25% compared with the asextruded LA113 alloy.

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“…Para uma baixa energia interfacial, os dois sólidos devem ser coerentes ou parcialmente coerentes, o que leva a uma relação de orientação entre as duas fases. Segundo Zhang, 2005 [15], se o valor da diferença entre os parâme-tros cristalinos for menor ou igual a 10% é possível que exista uma relação de orientação entre os dois cristais.…”

Section: Difusão Dos Elementos Através Da Camada De Diboretosunclassified

Refino de grão de ligas alumínio- silício com ante-ligas Al-B

2016

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RESUMOCom o objetivo de conhecer a influência das partículas AlB 2 e AlB 12 na capacidade de refino de grão de uma liga Al-4B sobre ligas de fundição à base de alumínio-silício, realizou-se testes de refino TP1 da Aluminum Association variando-se as concentrações de AlB 2 e AlB 12 . Para a caracterização química foram utilizadas as técnicas de espectrometria de emissão óptica e espectrometria de energia dispersiva (EDS). O método utilizado para medir os tamanhos de grão foi o do intercepto, através de uma lupa estereoscópica. Os resultados foram comparados com os do refinador convencional Al-5Ti-1B. A liga alumínio-silício utilizada foi a Al11Si-0,1Mg, comum na produção de rodas automotivas. A liga Al-4B com 100% de partículas AlB 2 apresentou a melhor capacidade de refino, proporcionando tamanhos médios de grãos de 0,26 mm na liga Al-11Si-0,1Mg, no tempo de amostragem de 5 minutos. A liga Al-4B com 100% de partículas AlB 12 apresentou um resultado intermediário, com tamanhos médios de grãos de 0,43 mm na liga Al-11Si-0,1Mg, no tempo de 5 minutos. A liga Al-11Si-0,1Mg refinada usando-se o refinador convencional Al-5Ti-1B apresentou tamanho médio de grão de 0,63 mm após 5 minutos de amostragem, o pior resultado quando comparado com os refinadores Al-4B com 100% de partículas AlB 2 e AlB 12 respectivamente. Palavras-chave:Refino de grão, alumínio, boro. ABSTRACTIn order to investigate the influence of AlB 2 and AlB 12 particles on the grain refining performance of an Al-4B master alloy in aluminum-silicon casting alloys, Aluminum Association TP-1 grain size tests were performed for varying concentrations of AlB 2 and AlB 12 . For the chemical characterization, optical emission spectrometry and energy dispersive spectrometry (EDS) were used. Grain sizes were measured by line intercept method using stereoscopic microscope. The results were compared with the conventional grain refiner Al-5Ti-1B. The aluminum-silicon alloy used was the Al-11Si-0.1Mg, common in the production of automotive wheels. The master alloy Al-4B with 100% of AlB 2 particles showed the best refining performance, providing average grain sizes of 0.26 mm in the alloy Al-11Si-0.1Mg after sampling time of 5 minutes. The alloy Al-4B with 100% of AlB 12 particles showed an intermediate result, with average sizes of 0.43 mm in the alloy Al-11Si-0.1Mg after sampling time of 5 minutes. The alloy Al-11Si-0,1Mg refined using the conventional grain refiner Al-5Ti-1B presented average grain size of 0,63 mm after 5 minutes of sampling time, the worst result compared with the refiners Al-4B with 100% of AlB 2 and AlB 12 particles respectively.

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Crystallographic study of grain refinement in aluminum alloys using the edge-to-edge matching model

Cited by 424 publications

References 24 publications

Development of Al-B-C Master Alloy Under External Fields

Development of Al-B-C Master Alloy Under External Fields

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

Refino de grão de ligas alumínio- silício com ante-ligas Al-B

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