Journal ArticleDOI
Electron microscope study of Al-Fe-Si intermetallics in 6201 aluminum alloy
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TLDR
In this paper, the α-Al8Fe2Si intermetallics present in a commercial cast 6201 electrical conductor alloy have been studied using high resolution electron microscopy.Abstract:
The Al-Fe-Si intermetallics present in a commercial cast 6201 electrical conductor alloy have been studied using high resolution electron microscopy. The β-Al5FeSi phase is highly faceted and contains multiple (001) growth twins parallel to the growth direction. The α-Al8Fe2Si phase which forms in a Chinese script morphology has a nonfaceted interface with the aluminum matrix and exhibits no growth twinning. Formation of the β phase is believed to occurvia a peritectic decomposition of α-Al8Fe2Si at 612 °C. Observations made by transmission electron microscopy (TEM) support this hypothesis. When 30 ppm strontium is added to this alloy, the α phase is stabilized and very little β-Al5FeSi appears in the microstructure. A silicon-rich layer is found around the α-phase particles. It is proposed that strontium adsorbs to the α-phase interface, and in so doing, the diffusion of silicon into the α phase, necessary for its transformation to β, is prevented.read more
Citations
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Microstructure, precipitates and hardness of selectively laser melted AlSi10Mg alloy before and after heat treatment
TL;DR: In this paper, the microstructure and precipitates within selectively laser melted (SLM) AlSi10Mg alloys in the as-built state and after T6 heat treatment were examined and correlated to the hardness evolution.
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Assessment of different techniques for quantification of α-Al(FeMn)Si and β-AlFeSi intermetallics in AA 6xxx alloys
TL;DR: In this paper, several quantitative methods, which determine the relative volume fraction of α-Al(FeMn)Si and β-AlFeSi, are compared and an assessment of each method is made.
Journal ArticleDOI
Comparative study of performance comparison of AlSi10Mg alloy prepared by selective laser melting and casting
Qian Yan,Bo Song,Yusheng Shi +2 more
TL;DR: In this article, the influence of the microstructure on mechanical properties of AlSi10Mg fabricated by casting and selective laser melting (SLM) was investigated and contrasted, with an emphasis on understanding the forming mechanism.
Journal ArticleDOI
In situ study of nucleation and growth of the irregular alpha-Al/beta-Al5FeSi eutectic by 3-D synchrotron X-ray microtomography
TL;DR: In this paper, the formation of alpha-Al5FeSi intermetallic plates during solidification of Al-Si casting alloys was studied by in situ microtomography using high-energy X-rays in the synchrotron.
Journal ArticleDOI
Effect of casting and homogenizing treatment conditions on the formation of Al–Fe–Si intermetallic compounds in 6063 Al–Mg–Si alloys
TL;DR: The effect of casting and homogenizing treatment conditions on the formation of several Al-Fe-Si intermetallic compounds in 6063 aluminum alloy was investigated using X-ray diffraction and transmission electron microscopy (TEM) as mentioned in this paper.
References
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Journal ArticleDOI
The influence of Fe and Cr on the microstructure of cast Al-Si-Mg alloys
TL;DR: In this article, the microstructure of cast aluminum alloys based on Al-7 pct Si-0.3 pct Mg (A356) has been investigated as a function of Fe and Cr content and solidification rate.
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Intermetallic phases formed during DC-casting of an Al−0.25 Wt Pct Fe−0.13 Wt Pct Si alloy
TL;DR: In this paper, the Al−Fe and al−Fe−Si particles formed during DC-casting of an Al 0.25 wt pct Fe-0.13 wt ppct Si alloy have been examined by transmission electron microscopy and energy dispersive spectroscopy of X-rays.
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On equilibrium and non-equilibrium peritectic transformations
H. W. Kerr,J. Cisse,G.F Bolling +2 more
TL;DR: In this article, a review of the literature on the kinetics of peritectic transformations is presented, in terms of the expected free energy curves of the three phases of the phase diagram.
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Modification in the aluminum silicon system
TL;DR: In this paper, it was shown that the structural modification in furnace cooled ingots, as in directionally grown samples, is primarily caused by modified growth of silicon, and the mechanism(s) for such modification are briefly discussed.
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Microstructure control and extrudability of Al–Mg–Si alloys microalloyed with manganese
TL;DR: In this article, it was shown that a small addition of Mn significantly accelerates the homogenising process (transformation of the brittle plate-like β-AlFeSi phase to the more rounded α-Al FeSi phase) which results in superior hot formability and ductility.