Microstructure investigation of equal channel angular pressed aluminium by X‐ray diffraction and scanning electron microscopy

Korchef, Atef; Njah, Nabil; Kolsi, A. W.

doi:10.1002/crat.200800131

Cited by 4 publications

(12 citation statements)

References 16 publications

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“…In addition, they may be partially dissolved during SPD. Supporting the latter is the observation by Korchef et al [42] that the lattice parameter of the Al-rich phase in Al 1100 alloy decreased during ECAP processing, which may be due to the dissolution of elements such as Si and Fe.…”

Section: The Evolution Of Microstructure In Pure Al During Hptmentioning

confidence: 84%

Al–Mg–Cu based alloys and pure Al processed by high pressure torsion: The influence of alloying additions on strengthening

Zhang

Gao

Starink

2010

Materials Science and Engineering: A

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The influence of alloying additions on strengthening of high pressure torsion (HPT) processed alloys was investigated using commercially pure Al (Al-1050 alloy) and five Al-(1-3)Mg-(0-4)Cu alloys (in wt%). Microhardness was measured on cross sections. For Al-1050 the microhardness reaches a peak at an effective strain of about 3 and subsequently decreases. The microhardness of Al-Mg-Cu alloys increases strongly and continuously with increasing equivalent strain. This workhardening rate is enhanced by increasing Mg content over the entire range of strain. Furthermore, the workhardening rates were higher in Cu-free and low Cu-containing (≤ 0.4%) Al-Mg alloys as compared to high Cucontaining Al-Mg alloy at strains less than 3. The results indicate that dislocation-solute and dislocation-cluster interactions play an important role in strengthening.

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Section: The Evolution Of Microstructure In Pure Al During Hptmentioning

confidence: 84%

Al–Mg–Cu based alloys and pure Al processed by high pressure torsion: The influence of alloying additions on strengthening

Zhang

Gao

Starink

2010

Materials Science and Engineering: A

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“…In conclusion, the lattice parameter did not change regularly during ECAP process. This behaviour of the cell parameter as a function of the number of passes arises mainly from two opposing alloying effects [31,32]: i) the existence of vacancies and dissolution of the elements, having lower atomic radii (e.g. Fe (1.17 Å) and Si (1.26 Å)) than Al (1.43 Å) decrease the lattice parameter and ii) the dissolution of elements, having higher atomic radii (e.g.…”

Section: X-ray Diffraction Analysismentioning

confidence: 99%

“…Besides, the total solubility of precipitate increases the lattice parameter [31]. GBs are thought to be barriers to the dislocations motion.…”

Section: X-ray Diffraction Analysismentioning

confidence: 99%

Structure and microstructure evolution of Al–Mg–Si alloy processed by equal-channel angular pressing

Khelfa

Rekik

Khitouni

et al. 2017

Int J Adv Manuf Technol

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An ultrafine grained Al-Mg-Si alloy was prepared by severe plastic deformation using the Equal Channel Angular Pressing (ECAP) method. Samples were ECAPed through a die with an inner angle of Φ=90º and outer arc of curvature of ψ= 37° from 1 to 12 ECAP passes at room temperature following route Bc. To analyze the evolution of the microstructure at increasing ECAP passes x-ray diffraction and Electron Backscatter Diffraction analyses were carried out. The results revealed two distinct processing regimes, namely: i) from 1 to 5 passes, the microstructure evolved from elongated grains and sub-grains to a rather equiaxed array of ultrafine grains and ii) from 5 to 12 passes where no change in the morphology and average grain size was noticed. In the overall behavior, the boundary misorientation angle and the fraction of high-angle boundaries increase rapidly up to 5 passes and at a lower rate from 5 to 12 passes. The crystallite size decreased down to about 45 nm with the increase in deformation. The influence of deformation on precipitate evolution in the Al-Mg-Si alloy was also studied by differential scanning calorimetry. A significant decrease in the peak temperature associated to the 50% of recrystallization was observed at increasing ECAP passes.

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“…The structural features of this film are explored from XRD data [18] [19]. XRD of aluminium film is shows in fig.2.a.…”

Section: Xrd Of Nano Aluminium Filmmentioning

confidence: 99%

Nano Thin Aluminium Coating as Superhydrophobic Surface: Fabrication by RF/DC Magnetron Sputtering and its Characterisation

2017

IJAERD

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Abstract:The hierarchical structured surface of the lotus (Nelumbo nucifera) . Inspired by the phenomenon observed in some plant leaves and insects [3,4,5] superhydrophobic surfaces whose contact angles (CA) with water are higher the 150° [6] have significant application towards corrosion prevention. Since water is mainly responsible for corrosion problems on most of materials especially on steel structures. These materials which mimic this superhydrophobic property on coating may suppress the role of corrosion. Therefore the aim of scientists is to create a coating with a surface morphology that mimics morphology of the lotus leaf. In order to fabricate such superhydrophobic surface, the physical parameter utilised to assess its water repellent phenomena is its CA towards water. Generally, for fabrication of superhydrophobic surface or film, it is necessary to create a rough surface on hydrophobic surface [7] (CA>90°) and to lower the surface energy by chemical modification such as coating with fluoroalkylsilanes [8][9][10][11][12][13] In this present study, superhydrophobic nature on substrates by developing nano coating using RF-DC sputtering technique. Further, step by step enhancement in contact angle is achieved by coating different materials like metallic stearate, nano particles along with polymer matrix over nano film coated surface. EXPERIMENTAL MATERIALS AND METHODS

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Microstructure investigation of equal channel angular pressed aluminium by X‐ray diffraction and scanning electron microscopy

Cited by 4 publications

References 16 publications

Al–Mg–Cu based alloys and pure Al processed by high pressure torsion: The influence of alloying additions on strengthening

Al–Mg–Cu based alloys and pure Al processed by high pressure torsion: The influence of alloying additions on strengthening

Structure and microstructure evolution of Al–Mg–Si alloy processed by equal-channel angular pressing

Nano Thin Aluminium Coating as Superhydrophobic Surface: Fabrication by RF/DC Magnetron Sputtering and its Characterisation

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