Metallurgy and Foundry Engineering
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ISSN 1230-2325
e-ISSN: 2300-8377
Issue Date
2019
Volume
Vol. 45
Number
No. 2
Description
Journal Volume
Metallurgy and Foundry Engineering
Vol. 45 (2019)
Projects
Pages
Articles
The influence of welding method on microstructure and mechanical properties of aluminum alloys joints
(Wydawnictwa AGH, 2019) Noga, Piotr; Richert, Maria Wiesława; Węglowski, Marek Stanisław
Rapid technological progress in recent years has led to an intensified interest in alternative methods of joining metals. Today's industry is constantly demanding new joining processes, which enable high-quality welded joints in a wide range of thicknesses of combined materials at low production cost. There are at least several dozen welding methods currently available. The selection of the process depends on the type of welded materials, acceptable heat input, as well as future working conditions. The paper presents the results of the microstructural examination and mechanical properties of joints of the aluminum alloy for plastic working such as EN AW-6082. The paper presents the results of microstructural observations and mechanical properties of EN AW-6082 aluminum alloy. Methods used for joining were successively TIG (welding with a non- -consumable electrode in a shield of inert gases), MIG (welding with a consumable electrode in a shield of inert gases), EBW (electron beam welding) along with FSW (friction stir welding method). TIG (welding with a non-consumable electrode in a shield of inert gases), MIG (welding with a consumable electrode in a shield of inert gases), EBW (electron beam welding) along with FSW (friction stir welding method) were used as joining techniques.
Characteristics of an $Al-V_{2}O_{5}$ composite produced by powder metallurgy
(Wydawnictwa AGH, 2019) Skrzekut, Tomasz; Błaż, Ludwik
The paper presents the results of research on the $Al-V_{2}O_{5}$ composite manufactured by means of the mechanical alloying and powder metallurgy method. Observation of the microstructure and X-ray chemical composition (XRD) analysis of the composite after extrusion were carried out. One of the most desirable features of metallic composites - apart from mechanical properties - is their resistance to increased impact temperature. It was observed that the formation of intermetallic phases due to the chemical reaction between strengthening particles and the composite matrix depends primarily on the annealing conditions of the material. The hardness of the annealed samples, depending on the annealing temperature, were discussed with respect to the material microstructure transformation. Despite the high-temperature, annealing at 473-773K, the material hardness did not change significantly, and remained approx.125 HV. However, at higher annealing temperatures, i.e. 823K, the chemical reaction between the components leads to the formation of the $Al_{10}V$ particles and increases hardness.