In-situ study of morphology and growth of primary α-Al(FeMnCr)Si intermetallics in an Al-Si alloy

Bjurenstedt, Anton; Casari, Daniele; Seifeddine, Salem; Mathiesen, Ragnvald H.; Dahle, A. K.

doi:10.1016/j.actamat.2017.03.026

Cited by 73 publications

(24 citation statements)

References 28 publications

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“…This rhombic dodecahedron morphology of primary ¡-Al(Mn,Fe)Si phase has been confirmed by other workers. 13,14) However, in our observation, the rhombic dodecahedron ¡-Al(Mn,Fe)Si phase was not found even in the strip central region. In 3003 aluminum alloy, the ¡-Al(Mn,Fe)Si phase is hard to be considered as the primary phase during solidification.…”

Section: Characteristic Morphology Of the Secondary Particlecontrasting

confidence: 71%

Solidification Structure and Secondary Particles in Vertical-Type High-Speed Twin-Roll Cast 3003 Aluminum Alloy Strip

Sasisekharan

Kumai

2019

Mater. Trans.

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The effect of cooling rate on microstructure of vertical-type high-speed twin-roll cast 3003 aluminum alloy strip was investigated. The solidification structure was characterized in terms of grain size and kinds, size, morphology and chemical composition of secondary particles. The 3003 aluminum alloy strip consisted of cell structure, dendritic structure, globular grains and eutectic structure along the strip thickness direction. From the relationship between the cooling rates and as-cast grain size, the cooling rate of high-speed twin-roll cast strip surface area was estimated as 3.1 © 10 3 K/s. Significant differences in the formation of secondary particles were found between direct chill (DC)-casting and the high-speed twin-roll casting as a result of the different cooling rates; Al 6 (Mn,Fe) and ¡-Al(Mn,Fe)Si phase were identified in the DC-cast sample, whereas only ¡-Al(Mn,Fe)Si was predominant in the high-speed twin-roll cast strip. The Al 6 (Mn,Fe) particles in DC-cast sample were script-like morphology with high aspect-ratio. In contrast, ¡-Al(Mn,Fe)Si particles in the high-speed twin-roll cast strip was spore-like morphology. Most ¡-Al(Mn,Fe)Si particles in the strip were considered to be formed as one of the eutectic components from the liquid droplets trapped in the inter-dendrite regions. In particular, Fe-rich ¡-Al(Mn,Fe)Si phase was formed at strip central area due to the increase in Fe segregation at the growth front. [

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Section: Characteristic Morphology Of the Secondary Particlecontrasting

confidence: 71%

Solidification Structure and Secondary Particles in Vertical-Type High-Speed Twin-Roll Cast 3003 Aluminum Alloy Strip

Sasisekharan

Kumai

2019

Mater. Trans.

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“…Solidification of Fe-containing Al alloys has been studied using in situ X-ray imaging, providing information on the nucleation and morphological evolution of Fe-containing intermetallics [7,[9][10][11][12][13][14]. Terzi et al [10] observed the nucleation of the  phase on the oxide skins and the subsequent growth of the  phase into complex shapes using high 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 speed X-ray tomography.…”

Section: Imagingmentioning

confidence: 99%

Growth of β intermetallic in an Al-Cu-Si alloy during directional solidification via machine learned 4D quantification

et al. 2019

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Fe contamination is a serious composition barrier for Al recycling. In Fe-containing Al-Si-Cu alloy, a brittle and plate-shaped β phase forms, degrading the mechanical properties. 4D (3D plus time) synchrotron X-ray tomography was used to observe the directional solidification of Fe-containing Al-Si-Cu alloy. The quantification of the coupled growth of the primary and β phase (Al5FeSi) via machine learning and particle tracking, demonstrates that the final size of the β intermetallics were strongly influenced by the solute segregation and space available for growth. The temperature gradient direction controlled the β orientation. The work can be used to validate predictive models.

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“…Al8Mn5 and Al13Fe4) in Al or Mg-Al alloys [24][25][26] which could not reveal the dynamic formation processes. In situ X-ray radiography was used to capture the formation and evolution of α-Al(FeMnCr)Si [27,28] and β-Al5FeSi [29] intermetallic phases in iron-containing Al-Si/Al-Si-Cu alloys, which allows the growth dynamics to be determined, but provides limited information regarding on their 3D morphology. High-speed synchrotron tomographic imaging, which capture tomograms in seconds or sub-seconds [30], enables time-resolved characterization of Fe-enriched intermetallics in 3D (termed as 4D imaging [31][32][33][34][35]).…”

Section: Introductionmentioning

confidence: 99%

Growth dynamics of faceted Al13Fe4 intermetallic revealed by high-speed synchrotron X-ray quantification

Song

Magdysyuk

Tang

et al. 2021

Journal of Alloys and Compounds

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In-situ study of morphology and growth of primary α-Al(FeMnCr)Si intermetallics in an Al-Si alloy

Cited by 73 publications

References 28 publications

Solidification Structure and Secondary Particles in Vertical-Type High-Speed Twin-Roll Cast 3003 Aluminum Alloy Strip

Solidification Structure and Secondary Particles in Vertical-Type High-Speed Twin-Roll Cast 3003 Aluminum Alloy Strip

Growth of β intermetallic in an Al-Cu-Si alloy during directional solidification via machine learned 4D quantification

Growth dynamics of faceted Al13Fe4 intermetallic revealed by high-speed synchrotron X-ray quantification

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