Temperature dependence of film rupture and internal structural stability in liquid aluminium alloy foams

2020 ◽  
Vol 196 ◽  
pp. 325-337 ◽  
Author(s):  
F. García-Moreno ◽  
M. Jürgens ◽  
J. Banhart
Keyword(s):  
Temperature Dependence ◽  
Aluminium Alloy ◽  
Structural Stability ◽  
Film Rupture ◽  
Liquid Aluminium

scholarly journals Properties of „In Situ” 7475 Alloy Matrix Composites Reinforced Al3Ti Intermetalic Compound Extruded in Semi-Solid State

2016 ◽  
Vol 61 (1) ◽  
pp. 433-438 ◽  
Author(s):  
W. Szymański
Keyword(s):  
Heat Treatment ◽  
Solid State ◽  
Aluminium Alloy ◽  
Extrusion Process ◽  
Liquid Aluminium ◽  
Alloy Matrix ◽  
Electron Microscopies ◽  
Semi Solid ◽  
Composite Hardness

Studies were conducted to improve the mechanical properties of composites based on 7475 aluminium alloy reinforced with Al3Ti particles fabricated by the “in situ” process. The first step involved “dissolving” of titanium in the liquid aluminium alloy and fabricating in this way composite materials with different content of the reinforcing phase (15-45wt%). A relationship between the composite hardness and content of the reinforcing phase was confirmed. The second step involved the improvement of cohesion between the reinforcing particles and composite matrix. By extrusion of samples in semi-solid state, an average increase in hardness by 15-20% relative to the unextruded composite was obtained. In the third step, the fabricated composite was subjected to a heat treatment corresponding to the state T6 in 7475 alloy, which raised the hardness by about 30%. Structure examinations carried out by means of optical microscopy and scanning electron microscopies as well as the results of hardness measurements were described. They enabled estimating the effect of the content of produced Al3Ti particles, and of the extrusion process in semi-solid state and heat treatment parameters on the composite properties. In compression test, the yield strength and compressive strength of the heat-treated composites were determined.

scholarly journals Fast Synchrotron X-Ray Tomography of Dynamic Processes in Liquid Aluminium Alloy Foam

2016 ◽  
Vol 19 (11) ◽  
pp. 1600550 ◽  
Author(s):  
Paul Hans Kamm ◽  
Francisco García-Moreno ◽  
Tillmann Robert Neu ◽  
Korbinian Heim ◽  
Rajmund Mokso ◽  
...  
Keyword(s):  
Aluminium Alloy ◽  
Dynamic Processes ◽  
Liquid Aluminium ◽  
X Ray

scholarly journals Rate of Solution of Cr-Steel in Liquid Aluminium Alloy

1964 ◽  
Vol 50 (1) ◽  
pp. 56-63 ◽  
Author(s):  
Susumu MINOWA ◽  
Mineo KOSAKA
Keyword(s):  
Aluminium Alloy ◽  
Liquid Aluminium

Stability of SiC in Al-Rich Corner of Liquid Al-Si-Mg System

2005 ◽  
Vol 473-474 ◽  
pp. 415-420 ◽  
Author(s):  
Maziar Sahba Yaghmaee ◽  
György Kaptay
Keyword(s):  
Solid Solution ◽  
Composite Materials ◽  
Aluminium Alloy ◽  
Thermodynamic Analysis ◽  
Magnesium Content ◽  
Liquid Aluminium ◽  
Working Temperature ◽  
Si Content

The thermodynamic analysis of the SiC/Al-Si-Mg system has been performed in order to find the conditions to produce SiC/Al-Si-Mg composite materials with the stable SiC/alloy interface (for both a-SiC and b-SiC) and with the solidification of primary a-Al solid solution. The conditions to avoid the formation of Al4C3 are expressed as function of temperature, and the silicon and magnesium content of the liquid aluminium alloy. It has been shown that to ensure stabilization of (the more stable) b-SiC, lower Si-content is needed and higher working temperature is allowed, compared to the requirements to stabilize (the less stable) a-SiC.

scholarly journals Motion of liquid and stabilising particles in individual liquid aluminium alloy films

2020 ◽  
Vol 55 (29) ◽  
pp. 14125-14136
Author(s):  
Korbinian Heim ◽  
Alexei Ershov ◽  
Alexander Rack ◽  
John Banhart ◽  
Francisco García-Moreno
Keyword(s):  
Aluminium Alloy ◽  
Liquid Aluminium ◽  
Alloy Films

scholarly journals The rupture of a single liquid aluminium alloy film

Soft Matter ◽  
2014 ◽  
Vol 10 (26) ◽  
pp. 4711 ◽  
Author(s):  
K. Heim ◽  
F. García-Moreno ◽  
G. S. Vinod Kumar ◽  
A. Rack ◽  
J. Banhart
Keyword(s):  
Aluminium Alloy ◽  
Alloy Film ◽  
Liquid Aluminium

Simultaneous X-ray radioscopy/tomography and energy-dispersive diffraction applied to liquid aluminium alloy foams

2018 ◽  
Vol 25 (6) ◽  
pp. 1790-1796 ◽  
Author(s):  
Catalina Jiménez ◽  
Marlen Paeplow ◽  
Paul H. Kamm ◽  
Tillmann R. Neu ◽  
Manuela Klaus ◽  
...  
Keyword(s):  
Aluminium Alloy ◽  
High Speed ◽  
Metal Foam ◽  
Two Dimensions ◽  
Three Dimensions ◽  
X Ray Diffraction ◽  
Liquid Aluminium ◽  
X Ray ◽  
Foaming Process ◽  
X Ray Imaging

High-speed X-ray imaging in two dimensions (radioscopy) and three dimensions (tomography) is combined with fast X-ray diffraction in a new experimental setup at the synchrotron radiation source BESSY II. It allows forin situstudies of time-dependent phenomena in complex systems. As a first application, the foaming process of an aluminium alloy was studied in three different experiments. Radioscopy, optical expansion measurements and diffraction were used to correlate the change of foam morphology to the various phases formed during heating of an AlMg15Cu10 alloy to 620°C in the first experiment. Radioscopy was then replaced by tomography. Acquiring tomograms and diffraction data at 2 Hz allows even more details of foam evolution to be captured, for example, bubble size distribution. In a third experiment, 4 Hz tomography yields dynamic insights into fast phenomena in evolving metal foam.

scholarly journals Rheological Analysis of Semi-Solid A380.0 Aluminium Alloy / Analiza Właściwości Reologicznych Stopu Aluminium A380.0 W Stanie Stało-Ciekłym

2015 ◽  
Vol 60 (4) ◽  
pp. 2613-2618 ◽  
Author(s):  
K. Solek ◽  
S. Szczepanik
Keyword(s):  
Numerical Modeling ◽  
Solid State ◽  
Aluminium Alloy ◽  
Rheological Properties ◽  
Experimental Work ◽  
Liquid Aluminium ◽  
Rheological Analysis ◽  
Significant Achievement ◽  
Semi Solid ◽  
Material Tests

Knowledge of the rheological properties is crucial for the numerical modeling of technological processes. The main objective of this study was to conduct an analysis of the rheological properties of A380.0 (AlSi9Cu3(Fe)) aluminium alloy in the semi-solid state. The results could be used for identification of temperature range of the alloy, where thixoforming processes could be executed. Another purpose of the experimental work could be development of the mathematical models of the alloy apparent viscosity. The significant achievement of this particular study is an application of a viscometer which was specially designed for material tests executed at high temperatures, such as the measurement of liquid or semi-liquid aluminium viscosity. This paper presents the results of a rheological analysis of aluminium alloy.

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