Email this article THE APPLICATION OF TECHNOLOGICAL METHODS FOR ENHANCING THE STRENGTH OF DISSIMILAR JOINTS PRODUCED BY FRICTION STIR WELDING
- Authors: Rzaev R.A.1, Chularis A.A.2, Dosimov A.S.1, Naumov A.A.3, Zotov O.G.3
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Affiliations:
- Astrakhan State University
- Don State Technical University
- Peter the Great Saint-Petersburg Polytechnic University
- Issue: No 1 (2018)
- Pages: 67-76
- Section: Technical Sciences
- URL: https://vektornaukitech.ru/jour/article/view/108
- DOI: https://doi.org/10.18323/2073-5073-2018-1-67-76
- ID: 108
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Abstract
The technology of production of dissimilar joints is associated with the difficulties due to the differences of their thermophysical and other properties and special aspects of the process of joints’ formation. The application of friction stir welding (FSW) technology is the solution to the problem of weldability of bimetallic joints. The paper covers the study of mechanical properties of butt, butt-lap and lap joints of AD1 aluminum and M1 copper alloys, AD1 aluminum alloys and alloyed steels (12H18N10T), AD1 aluminum and OT4-1 alloys.
The subject of the analysis is the design of the edges of parts welded with FSW and the stage-by-stage analysis of the process of formation of butt, lap, tee, and combined joints of copper with aluminum based on the welding modes parameters. The paper analyzes the factors affecting the strength of dissimilar joints of the AD1 aluminum and M1 copper alloys produced with FSW. The influence of the geometry of the prepared edges of parts on the formation of the defect-free and consistent welded joints is studied. The authors showed promising directions of constructive design for various versions of butt joints (butt-lap joints: 30...600 bevel joint, fish-mouth joint, mortise joint) by means of the enlargement of actual contact area of the parts when subjected to loadings of normal or tangential stresses as opposed to the traditional ones operating within the pure tear conditions. The paper gives the results of the static tension tests, recommends the design-engineering techniques aimed at the improvement of the conditions and the activation of the process of formation of the adhesive dissimilar joints. The metallographic research of the welded joints’ macrosections showed the possibility to produce the defect-free welds with the complete weld root penetration; the mechanical tests of the butt, combined and lap joints proved the high level of full strength of dissimilar joints.
About the authors
R. A. Rzaev
Astrakhan State University
Author for correspondence.
Email: radmir.82@mail.ru
senior lecturer of Chair “Material Science and Welding Technology”
Russian FederationA. A. Chularis
Don State Technical University
Email: radmir.82@mail.ru
Doctor of Sciences (Engineering), professor of Chair “Machines and Automation of Welding Manufacturing”
Russian FederationA. S. Dosimov
Astrakhan State University
Email: dosasiat@mail.ru
graduate student
Russian FederationA. A. Naumov
Peter the Great Saint-Petersburg Polytechnic University
Email: anton.naumov@spbstu.ru
PhD (Engineering), assistant professor of Chair “Technology and Materials Research”
Russian FederationO. G. Zotov
Peter the Great Saint-Petersburg Polytechnic University
Email: zog-58@mail.ru
PhD (Engineering), assistant professor of Chair “Technology and Materials Research”
Russian FederationReferences
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