3-D morphology and growth mechanism of primary Al6Mn intermetallic compound in directionally solidified Al-3at.%Mn alloy

Kang, Huijun; Li, Xinzhong; Su, Yanqing; Li, Dongmei; Guo, Jingjie; Fu, Hengzhi

doi:10.1016/j.intermet.2011.12.015

Cited by 31 publications

(9 citation statements)

References 49 publications

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“…The typical microstructure of the cross-section of the cylindrical sample is displayed in Figure 4a. The black region refers to the α-Al matrix, while the white region reveals the Al6Mn phase with different morphologies, which is the same as the result in Reference [25]. The detailed SEM images are shown in Figure 4b,c.…”

Section: Microstructure Of Suction Casting Al-6 Wt% Mn Alloysupporting

confidence: 65%

Dendrite Morphology Evolution of Al6Mn Phase in Suction Casting Al–Mn Alloys

Chen

Hou

Xie³

et al. 2020

Materials

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The effects of solute element content and cooling rate on the morphology of Al6Mn phase in suction casting Al–Mn alloys were investigated by transmission electron microscope, scanning electron microscope, and X-ray diffractometer. Results show that Al6Mn dendrite morphology with different degrees of development can occur in the microstructure of as-cast Al–Mn alloys. For the Al–4 wt.% Mn alloy, there are small amounts of block Al6Mn crystals at the center of sample, while we see a block Al6Mn phase and a feathery Al6Mn phase in the sample of Al–6 wt.% Mn alloy. Moreover, the block Al6Mn phases in the Al–8 wt.% Mn alloy disappear, and only snowflake-like Al6Mn phases play a dominant role in the microstructure. However, with an increase in Mn content to 10 wt.%, more dendritic trunks are formed, and secondary dendrite arms are degraded more seriously due to the formation of an icosahedral quasicrystal in suction casting. In addition to the effect of Mn content on Al6Mn morphology, with the increase in cooling rate from the center to the edge of samples, the outline diameter of equiaxed dendrite decreases. The evolution of Al6Mn dendrite morphology and the formation of quasicrystal are further discussed.

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Section: Microstructure Of Suction Casting Al-6 Wt% Mn Alloysupporting

confidence: 65%

Dendrite Morphology Evolution of Al6Mn Phase in Suction Casting Al–Mn Alloys

Chen

Hou

Xie³

et al. 2020

Materials

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“…1a-1c. However, the primary Al6Mn/Al6(MnFe) and high volume of fine Al6(MnFe) intermetallics were formed in Alloy M20 with 2.0 % Mn [16,17], as shown in intermetallics. The difference between these two phases can be found in our previous paper [2].…”

Section: Resultsmentioning

confidence: 95%

Evolution of microstructure and elevated-temperature properties with Mn addition in Al–Mn–Mg alloys

Liu

Chen

2017

J. Mater. Res.

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“…where θ is the angle between n and the pre-defined facet vector, and the coefficients δ σ * , δ µ , and κ were set to 0.7, 0.5, and 0.75, respectively. Pre-defined {101} facet planes of octahedral Al 6 Mn were adopted in accordance with Kang et al [22] and Yang et al [23]. The nucleation of the precipitates followed a model proposed by Greer et al [24] which is widely used in phase-field simulations involving the nucleation of phases [10,25,26].…”

Section: Methodsmentioning

confidence: 99%

Solidification and Precipitation Microstructure Simulation of a Hypereutectic Al–Mn–Fe–Si Alloy in Semi-Quantitative Phase-Field Modeling with Experimental Aid

Park

Kang

et al. 2020

Metals

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In this study, microstructural evolution during solidification of a hypereutectic Al–Mn–Fe–Si alloy was investigated using semi-quantitative two-/three-dimensional phase-field modeling. The formation of facetted Al6Mn precipitates and the temperature evolution during solidification were simulated and experimentally validated. The temperature evolution obtained from the phase-field simulation, which was balanced between extracted heat and latent heat release, was compared to the thermal profile of the specimen measured during casting to validate the semi-quantitative phase-field simulation. The casting microstructure, grain morphology, and solute distribution of the specimen were analyzed using electron backscatter diffraction and energy-dispersive spectroscopy and compared with the simulated microstructure. The simulation results identified the different Fe to Mn ratios in Al6(Mnx,Fe1−x) precipitates that formed during different solidification stages and were confirmed by energy-dispersive spectroscopy. The precipitates formed in the late solidification stage were more enriched with Fe than the primary precipitate due to solute segregation in the interdendritic channel. The semi-quantitative model facilitated a direct comparison between the simulation and experimental observations.

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3-D morphology and growth mechanism of primary Al6Mn intermetallic compound in directionally solidified Al-3at.%Mn alloy

Cited by 31 publications

References 49 publications

Dendrite Morphology Evolution of Al6Mn Phase in Suction Casting Al–Mn Alloys

Dendrite Morphology Evolution of Al6Mn Phase in Suction Casting Al–Mn Alloys

Evolution of microstructure and elevated-temperature properties with Mn addition in Al–Mn–Mg alloys

Solidification and Precipitation Microstructure Simulation of a Hypereutectic Al–Mn–Fe–Si Alloy in Semi-Quantitative Phase-Field Modeling with Experimental Aid

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