Abstract
The paper analyzes the problem of friction stir welding (FSW) technology. The mechanism of thermo-mechanical process of the FSW method has been identified and a correlation between the weld zone and its microstructure established. Presented are the basic analytical formulations for the definition of temperature fields. Analysis of influential parameters of welding FSW technology at the zone of the weld material and mechanical properties of the realized joint was performed. Influential welding parameters were defined based on tool geometry, technological parameters of processing and the axial load of tool. Specific problems with the FSW process are related to gaps (holes) left behind by a tool at the end of the process and inflexibility of welding regarding the degree of variation of material thickness. Numerical simulation of process welding FSW proceeding was carried out on the example of Aluminum Alloy (AA 2219) using the ANSYS Mechanical ADPL (Transient Thermal) software package. The defined was the temperature field in the welding process at specified time intervals. DOI: http://dx.doi.org/10.5755/j01.ms.22.3.10022
Highlights
Modern conditions of production from technology of welding procedures require very specific requirements in terms of joining of different materials and light metal alloys, which cannot be realized using conventional methods of welding
Unlike the classical method for joining materials by friction, heat generation in the friction stir welding (FSW) method is achieved through a special cylindrical tool with tapered pin, whose role is to stir the heated material along the joint line [2]
If higher amounts of heat are introduced during the welding process than the minimum required for completing the diffusion process, the heat affected zone (HAZ) characterized higher structural changes, which adversely influences the mechanical properties of the joint [3]
Summary
Modern conditions of production from technology of welding procedures require very specific requirements in terms of joining of different materials and light metal alloys, which cannot be realized using conventional methods of welding. The development of welding technology in this direction initiated a new method known as friction stir welding (FSW). This welding process was developed by Thomas et al [1] from the WTI (UK) and results of their research were first presented in 1991. If higher amounts of heat are introduced during the welding process than the minimum required for completing the diffusion process, the heat affected zone (HAZ) characterized higher structural changes, which adversely influences the mechanical properties of the joint [3]. The appearance of cracks, residual stresses, harmful gases and vapors, as well as the porous structure and the need for eliminating oxides from the metal are the basic
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
