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Technological valuation of friction spot welding (FSpW) in dissimilar alloys

Grant number: 14/16791-0
Support Opportunities:Scholarships abroad - Research
Effective date (Start): January 13, 2015
Effective date (End): July 18, 2015
Field of knowledge:Engineering - Materials and Metallurgical Engineering
Principal Investigator:Nelson Guedes de Alcântara
Grantee:Nelson Guedes de Alcântara
Host Investigator: Jorge Fernandez dos Santos
Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Research place: Helmholtz Association, Germany  


The solid state welding process called Friction Stir Welding - FSW has been applied to joint many engineering materials such as lightweight alloys, magnesium and aluminum, and other nonferrous alloys and steels, instead of the traditional fusion welding processes, due to its versatility, productivity, quality and competitive cost. Several examples of successful application of this welding process can be seen in various industrial sectors. The versatility of this solid state welding technique made derivative of the process to meet the industrial production demand of different types of joints and materials. Among these processes we highlight the process of Friction Spot Welding - FSpW. This welding process was developed and patented by German research institute Helmholtz-Zentrum Geesthacht (HZG). The process FSpW is already well established for the various alloys of aluminum and magnesium, and is being applied industrially to replace riveting and resistance spot welding. However for joining dissimilar joints with the iron-based alloys and other high melting point alloy the technology is not yet implemented and needs to be developed. This lag with respect to light alloys is due to the fact that until recently there was no tools that maintain the required properties at the process temperatures. Given the availability of this FSpW technique and welding tools in HZG, and the existance of DP600 steels, AISI 304 and HSLA-65 and titanium alloy Ti6Al4V, alloys of interest in aerospace, automotive, marine, chemical, and energy, and currently welded by other welding processes, this work will focus on FSpW of dissimilar alloys. As stated earlier these dissimilar welded joints have interest in various industrial segments, however there is no methodology and information in the literature of how this technology impacts on the market or society. Therefore, this proposal included a management component that focuses on the valuation of this technology, with analysis of direct and indirect impact. This project will combine technical scientific components (FSpW of dissimilar alloys) and management (valuation of technology) in order to increase the range and interest of the results. The project entry are market information and technological forecasting, the definition of the dissimilar joint and respective welding parameters, and the output a defect free dissimilar joint with properties compatible to industrial applications, and information about its social-economic-environmental value.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
PLAINE, A. H.; SUHUDDIN, U. F. H.; ALCANTARA, N. G.; DOS SANTOS, J. F.. Microstructure and mechanical behavior of friction spot welded AA6181-T4/Ti6Al4V dissimilar joints. INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY, v. 92, n. 9-12, p. 3703-3714, . (14/16791-0)
PLAINE, A. H.; SUHUDDIN, U. F. H.; ALCANTARA, N. G.; DOS SANTOS, J. F.. Fatigue behavior of friction spot welds in lap shear specimens of AA5754 and Ti6Al4V alloys. INTERNATIONAL JOURNAL OF FATIGUE, v. 91, n. 1, p. 149-157, . (14/16791-0)
PLAINE, A. H.; SUHUDDIN, U. F. H.; AFONSO, C. R. M.; ALCANTARA, N. G.; DOS SANTOS, J. F.. Interface formation and properties of friction spot welded joints of AA5754 and Ti6Al4V alloys. MATERIALS & DESIGN, v. 93, p. 224-231, . (14/16791-0)

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