D. Leśniak
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View article: Thermo-mechanical processing of Al–Mg–Si(Cu) alloy extrusions based on dynamic stretching
Thermo-mechanical processing of Al–Mg–Si(Cu) alloy extrusions based on dynamic stretching Open
In the first part of the work, the 3-step homogenization procedure was carried out for AlMgSi(Cu) alloy, aimed at obtaining billets microstructure with numerous fine particles of strengthening phases and increased solidus temperature. In t…
View article: Dedicated Material Models of EN AW-7021 Alloy for Numerical Modeling of Industrial Extrusion of Profiles
Dedicated Material Models of EN AW-7021 Alloy for Numerical Modeling of Industrial Extrusion of Profiles Open
In this paper, dedicated material models were developed and verified for three melts of EN AW-7021 alloy, differing in zinc and magnesium content, for tube extrusion conditions. Based on the plastometric tests, it was found that in the stu…
View article: Effects of Copper Content and Thermo-Mechanical Treatment on Microstructure and Mechanical Properties of AlMgSi(Cu) Alloys
Effects of Copper Content and Thermo-Mechanical Treatment on Microstructure and Mechanical Properties of AlMgSi(Cu) Alloys Open
This study presents the results of research on the influence of different contents of copper in aluminium alloys based on the 6xxx series on mechanical and structural properties. The investigation started with the alloying, and casting fou…
View article: Estimation of Quality of Seam Welds in AlMgSi(Cu) Extrusion by Using an Original Device for Weldability Testing
Estimation of Quality of Seam Welds in AlMgSi(Cu) Extrusion by Using an Original Device for Weldability Testing Open
Extrusion welding of AlMgSi(Cu) alloys is carried out by using porthole dies, as a result of which hollow shapes are formed with longitudinal seam welds. In the case of the inappropriate selection of the chemical composition of the alumini…
View article: Structure and Mechanical Properties of AlMgSi(Cu) Extrudates Straightened with Dynamic Deformation
Structure and Mechanical Properties of AlMgSi(Cu) Extrudates Straightened with Dynamic Deformation Open
Before artificial ageing, extruded aluminium profiles are subjected to stretching with a small cold deformation in the range of 0.5–2%. This deformation improves the geometrical stability of the extruded product and causes changes in the m…
View article: Latest advances in extrusion processes of light metals
Latest advances in extrusion processes of light metals Open
The paper presents a review of the literature and authors’ research on the current achievements in the field of extrusion of aluminium alloys, magnesium alloys, powders and aluminium-based composites in particular. The microstructure trans…
View article: Development of Low-Weight and High-Strength AA6005A Extrudates Intended for Modern Architecture and Design of Innovative Die for Extrusion Process
Development of Low-Weight and High-Strength AA6005A Extrudates Intended for Modern Architecture and Design of Innovative Die for Extrusion Process Open
In the realm of modern architecture, the demand for materials that combine strength, durability, and aesthetic flexibility is ever-growing. Addressing this need, this paper presents a study on the innovative use of aluminum extrudates in c…
View article: Effects of Zn, Mg, and Cu Content on the Properties and Microstructure of Extrusion-Welded Al–Zn–Mg–Cu Alloys
Effects of Zn, Mg, and Cu Content on the Properties and Microstructure of Extrusion-Welded Al–Zn–Mg–Cu Alloys Open
The study presents the results of research on the influence of different contents of main alloying additions, such as Mg (2 ÷ 2.5 wt.%), Cu (1.2 ÷ 1.9 wt.%), and Zn (5.5 ÷ 8 wt.%), on the strength properties and plasticity of selected Al–Z…
View article: FEM Numerical and Experimental Work on Extrusion Welding of 7021 Aluminum Alloy
FEM Numerical and Experimental Work on Extrusion Welding of 7021 Aluminum Alloy Open
Extrusion welding of AlZnMg alloys encounters great technological difficulties in practice associated with high shaping forces and the low quality of longitudinal welds. Three different chemical compositions of 7021 aluminum alloy, differi…
View article: Homogenization of Extrusion Billets of a Novel Al-Mg-Si-Cu Alloy with Increased Copper Content
Homogenization of Extrusion Billets of a Novel Al-Mg-Si-Cu Alloy with Increased Copper Content Open
Within the present work the homogenization of DC-cast (direct chill-cast) extrusion billets of Al-Mg-Si-Cu alloy was investigated. The alloy is characterized by higher Cu content than currently applied in 6xxx series. The aim of the work w…
View article: FEM Numerical and Experimental Study on Dimensional Accuracy of Tubes Extruded from 6082 and 7021 Aluminium Alloys
FEM Numerical and Experimental Study on Dimensional Accuracy of Tubes Extruded from 6082 and 7021 Aluminium Alloys Open
The extrusion of hollow profiles from hard-deformable AlZnMg alloys by using porthole dies encounters great technological difficulties in practice. High extrusion force accompanies the technological process, which is caused by high deforma…
View article: Homogenization of 7075 and 7049 Aluminium Alloys Intended for Extrusion Welding
Homogenization of 7075 and 7049 Aluminium Alloys Intended for Extrusion Welding Open
During the extrusion of aluminum alloys profiles using porthole dies, the temperature of the material in the welding chamber is one of crucial parameters determining the quality of longitudinal welds. In order to extend the permissible tem…
View article: Estimation of Extrusion Welding Conditions for 6xxx Aluminum Alloys
Estimation of Extrusion Welding Conditions for 6xxx Aluminum Alloys Open
Extrusion of hollow shapes containing longitudinal welds from easy-to-weld aluminum alloys is realized in industrial practice by using porthole dies. In the work, an original method and a special modified device is presented that simulates…
View article: Anodic Oxide Coatings on Aluminium Resistant to Strong Alkali Environment
Anodic Oxide Coatings on Aluminium Resistant to Strong Alkali Environment Open
The aim of this paper was to test currently available on the market products for sealing anodic oxide coatings as well as to test the use of other alternative substances improving the sealing process. The ability to seal in 10 different so…
View article: Research on susceptibility of 7075 aluminium alloy to extrusion welding
Research on susceptibility of 7075 aluminium alloy to extrusion welding Open
Extrusion welding of the 7xxx series aluminium alloys, especially these of high strengthened containing copper is still a barrier difficult to overcome. The main limitations are: poor weldability of the material which decreases a product q…
View article: Investigations of Plasticity of Hard-Deformed Aluminium Alloys of 5xxx Series Using Torsion Plastometer
Investigations of Plasticity of Hard-Deformed Aluminium Alloys of 5xxx Series Using Torsion Plastometer Open
This paper presents the results of the study aimed at determination of plasticity of selected grades of hard-deformed aluminium alloys of 5xxx series in terms of parameters characteristic for the process of extrusion. The examinations were…
View article: The Effect of Cooling Rate after Homogenization on the Microstructure and Properties of 2017a Alloy Billets for Extrusion with Solution Heat Treatment on the Press
The Effect of Cooling Rate after Homogenization on the Microstructure and Properties of 2017a Alloy Billets for Extrusion with Solution Heat Treatment on the Press Open
The influence of cooling rate after homogenization on the 2017A alloy microstructure was analysed. The capability of the θ (Al 2 Cu) particles, precipitated during various homogenization coolings, for rapid dissolution was estimated. For t…
View article: Susceptibility testing for welding of AlMg alloys intended for extrusion
Susceptibility testing for welding of AlMg alloys intended for extrusion Open
The objective of research was to determine the weldability, using Tungsten Inert Gas (TIG) of extruded sections made of hard-deformable 5xxx series aluminum alloys with differing magnesium content, i.e. AlMg3, AlMg4,5, AlMg5, AlMg7. Welded…
View article: Influence of Mg Content on Deformability of AlMg Alloys during Extrusion
Influence of Mg Content on Deformability of AlMg Alloys during Extrusion Open
In this study the research on deformability of AlMg alloys with high Mg contents in extrusion was carried out. The different shapes from AlMg alloys containing 3.5%, 4.5% and 5.5% of Mg were extruded on 500 T semi-industrial press by using…