Browsing by Author "Zazi N."

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    Effects of ECAP with One Pass Severe Deformation on Microhardness, Texture, and Corrosion Behavior of AA1370 Aluminum Alloy Wire
    (Pleiades journals, 2021) Youcef Hadj Ali; Zazi N.; Durmus H.; Chopart J.-P.
    Abstract: In this paper, We investigate the effects of one pass severe deformation, obtained by equal channel angular pressing (ECAP) process, using dies with channel angles of 90° and 120°, on hardness, texture, and corrosion behavior, of AA1370 aluminum alloy wire. A severe deformation, by ECAP process, leads to athinning of several diffraction peaks and an increase of their angular values; modifies the texture of material from pseudo-texture to mix texture; reduces the microhardness; modifies a part of localized corrosion towards generalized one; shifts the corrosion potential to negative values; and increases the values of open circuit potential (OCP). The deformation by ECAP process induces fragmentation of parts of intermetallic particles, and reduction of grains size. The imprisoned air, between the channel wall of the die and the wire, creates microporosities in the deformed samples. © 2020, Pleiades Publishing, Ltd.
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    Effects of Al2O3 Particles on Corrosion Behavior and Microstructure of Al–Al2O3 Composites and Texture of Aluminum Matrix
    (Pleiades Publishing, 2024) Dehrib S.; Zazi N.; Durmus H.
    Abstract: In this paper, we studied the influence of alumina particles addition, 5, 10, and 15 wt %, on the microstructure after elaboration of Al–Al2O3 MMC composite, morphology and kinetic of corrosion, hardness, texture evolution of aluminum matrix. The results show distribution of alumina particles in shape of petal-like phase in some zones, in form of flack in another region for sample with 5% addition alumina, and in mixture between truncated petal-like phase and flake form particles for the sample with 10% addition of alumina, of flake in zone 1 one and a mixture of petal-like phase and flake in zone 2 for the sample with 15% addition of Al2O3, the samples with 5 and 10% Al2O3 were undergo generalized corrosion almost in the all surfaces, but for the sample with 15% addition of was undergo the corrosion which don’t tends to generalized corrosion. The corrosion resistance increase when the Al2O3 addition increases. The texture of aluminum changes slightly when the alumina powders are added to aluminum. The hardness change when alumina powders are added to aluminum. © Pleiades Publishing, Ltd. 2024.