|
|
Structure and properties of welded joint TiAl6V4 / 6061 made by electron beam technology
Král, Michael ; Jan, Vít (referee) ; Foret, Rudolf (advisor)
Titanium and aluminium alloys are among the most used construct materials due to their physical and mechanical properties except steels. The joining of these alloys can improve properties of whole construction but it is still difficult task. Especially welding of titanium and aluminium alloys is difficult cause formation of undesirable intermetalic phases in the weld. This thesis focuses on influences of electron beam welding parameters especially focusing and deflection of beam and preheating of base material to quality of heterogeneous join of titanium alloy Ti6Al4V and aluminium alloy EN AW-6061 – T651. There is described preparation of welded joins and brazed joins in the thesis, which are evaluated by light microscopy, scanning electron microscopy and EDS analysis of chemical composition. There was evaluated presence and chemical composition of formated intermetalic phases in the welded joins and quality and defects in the brazed joins.
|
|
|
Macro and microstructure of weld joints made of titanium alloy TiAl6V4 by electron beam
Prachař, Václav ; Havlík, Petr (referee) ; Foret, Rudolf (advisor)
The aim of this bachelor thesis is to evaluate macro and microstructures of weld joints made of titanium alloy Ti6Al4V by electron beam welding with different processing parameters of electron beam and evaluate the impact of this processing parameters to the structure of resultant weld joints. The theoretical part deals with titanium and its alloys, the titanium alloy Ti6Al4V and electron beam welding technology. In the experimental part, 11 weld joints are evaluated, their macro and microstructures and hardness profiles.
|
|
|
ELECTRON BEAM WELDING OF HETEROGENEOUS WELDS OF Ti/Al ALLOYS
Havlík, Petr ; Dřímal, Daniel (referee) ; Schwarz,, Drahomír (referee) ; Foret, Rudolf (advisor)
The problematics of weldability of heterogeneous welds of aluminium and titanium alloys produced by electron beam welding is discussed in this work. Homogenous welds of selected alloys were analyzed in the first stage. Welding of these materials relates to formation of intermetallic phases at the interface of base materials due to differences in physical, chemical and metallurgical properties of base materials. One of the prerequisites for producing high quality weld joints is to find optimal process parameters. The influence of selected process parameters to integrity, structure and mechanical properties of heterogeneous Al/Ti joints is evaluated.
|
|
|
Mechanical properties of the weld of titanium alloy TiAl6V4 prepared by using an electron beam technology
Byrtus, Robin ; Pantělejev, Libor (referee) ; Válka, Libor (advisor)
The aim of the diploma thesis is to evaluate the mechanical properties and fracture behavior of the weld join Ti6Al4V titanium alloy prepared by using an electron beam technology. The theoretical part deals with the welding of titanium alloys with the help of electron beam, the weldability evaluation of titanium alloys, the influence of electron beam welding on the microstructure and the methods of testing of weld joints. Using the experiments, the mechanical properties of the base material and the weld were evaluated and a structural analysis of the weld was performed.
|
|
|
Welding of titanium alloys using electron beam
Schiffer, Martin ; Foret, Rudolf (referee) ; Havlík, Petr (advisor)
This bachelor´s thesis is focused on issue of welding of titanium alloys using electron beam. It is dedicated to description of principle of electron beam welding technology. There is described interaction of electron beam with the welded material, electron beam characterisation and configuration of device for electron beam welding. Next part is focused on evaluation of weldability of titanium alloys. It includes general description of weldability of materials, description, distribution and weldability of titanium alloys and finally evaluation of effect of electron beam welding on the microstructure. As an example, there is described effect of EBW on mechanical properties of alloy Ti-6Al-4V. In the end this technology is compared with other methods of fusion welding as laser beam welding, arc welding methods and plasma arc welding.
|
|
|
ELECTRON BEAM WELDING OF HETEROGENEOUS WELDS OF Ti/Al ALLOYS
Havlík, Petr ; Dřímal, Daniel (referee) ; Schwarz,, Drahomír (referee) ; Foret, Rudolf (advisor)
The problematics of weldability of heterogeneous welds of aluminium and titanium alloys produced by electron beam welding is discussed in this work. Homogenous welds of selected alloys were analyzed in the first stage. Welding of these materials relates to formation of intermetallic phases at the interface of base materials due to differences in physical, chemical and metallurgical properties of base materials. One of the prerequisites for producing high quality weld joints is to find optimal process parameters. The influence of selected process parameters to integrity, structure and mechanical properties of heterogeneous Al/Ti joints is evaluated.
|
|
|
Mechanical properties of the weld of titanium alloy TiAl6V4 prepared by using an electron beam technology
Byrtus, Robin ; Pantělejev, Libor (referee) ; Válka, Libor (advisor)
The aim of the diploma thesis is to evaluate the mechanical properties and fracture behavior of the weld join Ti6Al4V titanium alloy prepared by using an electron beam technology. The theoretical part deals with the welding of titanium alloys with the help of electron beam, the weldability evaluation of titanium alloys, the influence of electron beam welding on the microstructure and the methods of testing of weld joints. Using the experiments, the mechanical properties of the base material and the weld were evaluated and a structural analysis of the weld was performed.
|
|
|
Macro and microstructure of weld joints made of titanium alloy TiAl6V4 by electron beam
Prachař, Václav ; Havlík, Petr (referee) ; Foret, Rudolf (advisor)
The aim of this bachelor thesis is to evaluate macro and microstructures of weld joints made of titanium alloy Ti6Al4V by electron beam welding with different processing parameters of electron beam and evaluate the impact of this processing parameters to the structure of resultant weld joints. The theoretical part deals with titanium and its alloys, the titanium alloy Ti6Al4V and electron beam welding technology. In the experimental part, 11 weld joints are evaluated, their macro and microstructures and hardness profiles.
|
|
|
Structure and properties of welded joint TiAl6V4 / 6061 made by electron beam technology
Král, Michael ; Jan, Vít (referee) ; Foret, Rudolf (advisor)
Titanium and aluminium alloys are among the most used construct materials due to their physical and mechanical properties except steels. The joining of these alloys can improve properties of whole construction but it is still difficult task. Especially welding of titanium and aluminium alloys is difficult cause formation of undesirable intermetalic phases in the weld. This thesis focuses on influences of electron beam welding parameters especially focusing and deflection of beam and preheating of base material to quality of heterogeneous join of titanium alloy Ti6Al4V and aluminium alloy EN AW-6061 – T651. There is described preparation of welded joins and brazed joins in the thesis, which are evaluated by light microscopy, scanning electron microscopy and EDS analysis of chemical composition. There was evaluated presence and chemical composition of formated intermetalic phases in the welded joins and quality and defects in the brazed joins.
|
|
|
Welding of titanium alloys using electron beam
Schiffer, Martin ; Foret, Rudolf (referee) ; Havlík, Petr (advisor)
This bachelor´s thesis is focused on issue of welding of titanium alloys using electron beam. It is dedicated to description of principle of electron beam welding technology. There is described interaction of electron beam with the welded material, electron beam characterisation and configuration of device for electron beam welding. Next part is focused on evaluation of weldability of titanium alloys. It includes general description of weldability of materials, description, distribution and weldability of titanium alloys and finally evaluation of effect of electron beam welding on the microstructure. As an example, there is described effect of EBW on mechanical properties of alloy Ti-6Al-4V. In the end this technology is compared with other methods of fusion welding as laser beam welding, arc welding methods and plasma arc welding.
|
guest ::
