Amorphous and Nanostructured Al-Fe and Al-Ni Based Alloys

Audebert, F.

doi:10.1007/1-4020-2965-9_27

Cited by 6 publications

(2 citation statements)

References 31 publications

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“…This type of amorphous phase can be observed in alloys with large fraction of the main component of the alloy, for example in Al-or Mg-based alloys 23 . F. Audebert & col. have studied several Al-Fe and Al-Ni based alloys with Al content higher than 85at% [23][24][25][26][27] . They found that amorphous phases with this heterogeneous characteristic show a pre-peak at low angle in the X-ray diffractogram, which is related with the strong chemical short range order due to the hetero-atomic clusters.…”

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confidence: 99%

Effect of Al addition to Rapidly Solidified Mg-Cu-Rare Earth Alloys

et al. 2016

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Rapidly solidified Mg based alloys are of interest for industrial applications as a structural material and for hydrogen storage. Mg-Cu-Rare Earth alloys have shown high glass forming ability; full amorphous structure with thickness of mm size can be obtained within these systems. However, their brittle behavior limits their industrial applications. In the present work, the Al effect in substitution of Cu in the Mg 65 Cu 25 MM 10 (at%, MM: mischmetal) was studied. Samples up to 15at% Al were prepared by splat cooling and their microstructure, stability and mechanical properties were characterised. The crystallization temperature increases with the Al addition; the amorphous phase with different Al content has a Young's modulus of ~55GPa; the microhardness increases with the Al content in the amorphous and crystallized samples and the fracture of the alloy containing 10at% Al showed ductile vein patterns characteristics of ductile metallic glasses. The partial Cu substitution by Al can improve the stability and mechanical properties of the amorphous Mg 65 Cu 25 MM 10 alloy.

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Effect of Al addition to Rapidly Solidified Mg-Cu-Rare Earth Alloys

et al. 2016

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“…Many current sources also describe the developing knowledge of amorphous-nanocrystalline composites [18]. Many known articles indicate the presence of quasicrystalline and crystalline phases without the discussed amplification mechanism [19,20]. Nanocrystalline aluminium alloys reinforced with crystalline nanoparticles are materials that constitute an original class that differs from quasicrystals and nanocrystals.…”

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Archives of Foundry Engineering

Młynarek,

Czeppe,

Babilas

2021

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The influence of rapid solidification from the liquid state on the structure of Al71Ni24Fe5 alloy was studied. The samples were prepared by induction melting (ingots) and high pressure die casting into a copper mold (plates). The structure was examined by X-ray diffraction (XRD), light microscopy and high resolution transmission electron microscopy (HRTEM). The mechanism of crystallization was described on the basis of differential scanning calorimetry (DSC) heating and cooling curves, XRD patterns, isothermal section of Al-Ni-Fe alloys at 850°C and binary phase diagram of Al-Ni alloys. The fragmentation of the structure was observed for rapidly solidified alloy in a form of plates. Additionally, the presence of decagonal quasicrystalline phase D-Al70.83Fe9.83Ni19.34 was confirmed by phase analysis of XRD patterns, Fast Fourier Transform (FFT) and Inverse Fast Fourier Transform (IFFT) of transmission electron microscopy images. The metastable character of D-Al70.83Fe9.83Ni19.34 phase was observed because of the lack of thermal effects on the DSC curves. The article indicates the differences with other research works and bring up to date the knowledge about Al71Ni24Fe5 alloys produced by two different cooling rates.

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