scholarly journals Mechanism and Morphology of Formation of Micropores in the Structure of DC Cast AlMgSi Alloy

2017 ◽  
Vol 5 (4) ◽  
pp. 102-110
Author(s):  
I. Buljeta ◽  
Z. Zovko Brodarac ◽  
A. Beroš ◽  
M. Zeko
Keyword(s):  
Almgsi Alloy

Analysis of the AlMgSi-alloy structure formed under the influence of low-frequency pulsed Lorentz force

2017 ◽  
Vol 53 (2) ◽  
pp. 245-254 ◽  
Author(s):  
D. Musaeva ◽  
E. Baake ◽  
V. Ilin ◽  
G. Jarczyk
Keyword(s):  
Lorentz Force ◽  
Low Frequency ◽  
Alloy Structure ◽  
Almgsi Alloy

Microstructural Design of an AlMgSi Alloy via ECAP Processing: An Advanced SPD Manufacturing Technique for NC/UFG Materials

2015 ◽  
Vol 1114 ◽  
pp. 143-148
Author(s):  
Nicolae Serban ◽  
Doina Răducanu ◽  
Vasile Danut Cojocaru ◽  
Nicolae Ghiban
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Grain Refinement ◽  
Shape Change ◽  
Large Strain ◽  
Metallographic Analysis ◽  
Cross Sectional ◽  
Ecap Processing ◽  
Microstructural Design ◽  
Almgsi Alloy

Severe plastic deformation (SPD) has received enormous interest over the last two decades as a method capable of producing fully dense and bulk ultra-fine grained (UFG) and nanocrystalline (NC) materials. Significant grain refinement obtained by SPD leads to improvement of mechanical, microstructural and physical properties. Compared to classical deformation processes, the big advantage of SPD manufacturing techniques, represented in particular by equal channel angular pressing (ECAP) is the lack of shape-change deformation and the consequent possibility to impart extremely large strain. In ECAP processing, the workpiece is pressed through a die in which two channels of equal cross-section intersect at an angle of ϕ and an additional angle of ψ define the arc of curvature at the outer point of intersection of the two channels. As a result of pressing, the sample theoretically deforms by simple shear and retains the same cross-sectional area to allow repeated pressings for several cycles. A commercial AlMgSi alloy was investigated in our study. The specimens were processed at room temperature for multiple passes, using three different ECAP dies. All samples (ECAP processed and as-received) were subjected to metallographic analysis and mechanical testing. Several correlations between the main processing parameters and the resulting microstructural aspect and mechanical features for the processed material were established. It was shown that severe plastic deformation by means of ECAP processing can be used in aluminum alloys microstructural design as an advanced tool for grain refinement in order to attain the desired microstructure and mechanical properties.

An Investigation of Microtexture Evolution in an AlMgSi Alloy Processed by High-Pressure Torsion

2011 ◽  
Vol 702-703 ◽  
pp. 165-168 ◽  
Author(s):  
Aicha Loucif ◽  
Thierry Baudin ◽  
François Brisset ◽  
Roberto B. Figueiredo ◽  
Rafik Chemam ◽  
...  
Keyword(s):  
Grain Size ◽  
High Pressure ◽  
Distribution Function ◽  
High Pressure Torsion ◽  
Electron Backscatter Diffraction ◽  
Orientation Distribution ◽  
Homogeneous Microstructure ◽  
Electron Backscatter ◽  
Backscatter Diffraction ◽  
Almgsi Alloy

This investigation uses electron backscatter diffraction (EBSD) to study the development of microtexture with increasing deformation in an AlMgSi alloy having an initial grain size of about 150 µm subjected to high pressure torsion (HPT) up to a total of 5 turns. An homogeneous microstructure was achieved throughout the disc sample at high strains with the formation of ultra-fine grains. Observations based on orientation distribution function (ODF) calculation reveals the presence of the torsion texture components often reported in the literature for f.c.c. materials. In particular, the C {001}<110> component was found to be dominant. Furthermore, no significant change in the texture sharpness was observed by increasing the strain.

Effect of Rolling Process on the Microstructure of AlMgSi Alloy

2011 ◽  
Vol 399-401 ◽  
pp. 40-45
Author(s):  
He Liang Li ◽  
Xiao Guang Yuan ◽  
Ming Fu Wu ◽  
Hong Jun Huang
Keyword(s):  
Reduction Rate ◽  
Rolling Process ◽  
Alloy Sheet ◽  
Second Phase ◽  
Rolling Pass ◽  
Second Phase Particles ◽  
Deformation Inhomogeneity ◽  
Hot And Cold Rolling ◽  
Process Combination ◽  
Almgsi Alloy

In this paper, a AlMgSi alloy for sheet materials was designed on the base of 6111 aluminum alloy, the alloy sheet was fabricated by the rolling process combination of hot and cold rolling, the effect of rolling process on the microstructure of alloy was studied. The results show that different 1st rolling pass reductions of 13%, 33% and 47%, alloy microstructure changes obviously. With the increasing of 1st rolling pass reductions, the re-crystallization structure grow in quantity, re-crystallization grain more and more dense, flat, uniform, and the second phase particles are also more small, distributes more uniform. When the first cold rolled reduction is 47%, degree of grain refinement, the second phase particles fragmentation and tissue uniformity in rolling 3st state are obviously superior to the 1st state and 2st states. The deformation inhomogeneity can be overcome by improving the first reduction rate, the re-crystallization process of synchronization between surface layer and the center layer is better.

Evaluation of the Effect of CO2 Cover Gas on the Rate of Oxidation of an AlMgSi Alloy

2020 ◽  
pp. 1141-1147
Author(s):  
Cathrine Kyung Won Solem ◽  
Kai Erik Ekstrøm ◽  
Gabriella Tranell ◽  
Ragnhild E. Aune
Keyword(s):  
Almgsi Alloy
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