Processes Developed Based on Friction Stir Welding Process

Considering the remarkable results obtained by using friction stir welding process (FSW), ISIM Timisoara has developed research programs for the knowledge and development of processing processes based on the FSW process principle.The paper presents a synthesis of the researches and the results obtained within some of research projects carried out by ISIM Timisoara, regarding possibilities of using some of processes derived from the FSW process, which has focused mainly on two directions (areas): surface engineering (materials surface processing) and joining by friction riveting. In the field of surfaces engineering, there are presented some results that represent own contributions of ISIM Timisoara, regarding: friction stir processing as well as coating with functional layers from lightweight alloys of steel substrates (by friction with consumable tool).Regarding friction riveting, two methods are presented: classic friction riveting, respectively friction riveting with hybrid effect (mechanical grip and friction welding).The paper shows very good results obtained to FSP processing (for cast aluminum alloys), to friction riveting with hybrid effect (for aluminum and copper alloys) and to friction riveting (for aluminum alloy), but also some limitations of these friction processing methods.Also in the paper are presented new research directions that are currently being addressed, respectively that will be addressed in the next period at ISIM Timisoara, regarding new variants of application of FSW welding.

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Possibilities to Apply Friction Stir Processing FSP in Surface Engineering

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.890.56 ◽

2021 ◽

Vol 890 ◽

pp. 56-65

Author(s):

Cristian Ciucă ◽

Lia Nicoleta Boțilă ◽

Radu Cojocaru ◽

Ion Aurel Perianu

Keyword(s):

Aluminum Alloys ◽

Friction Stir Processing ◽

Surface Engineering ◽

Copper Alloys ◽

Welding Process ◽

Industrial Applications ◽

Process Conditions ◽

Cast Aluminum ◽

Friction Stir ◽

Cast Aluminum Alloys

The results obtained by ISIM Timisoara to the development of the friction stir welding process (FSW) have supported the extension of the researches on some derived processes, including friction stir processing (FSP). The experimental programs (the researches) were developed within complex research projects, aspects regarding the principle of the process, modalities and techniques of application, experiments for specific applications, being approached. The paper presents good results obtained by friction stir processing of cast aluminum alloys and copper alloys. The optimal process conditions, optimal characteristics of the processing tools were defined. The complex characterization of the processed areas was done, the advantages of the process applying being presented, especially for the cast aluminum alloys: EN AW 4047, EN AW 5083 and EN AW 7021. The characteristics of the processed areas are compared with those of the base materials. The results obtained are a solid basis for substantiating of some specific industrial applications, especially in the automotive, aeronautical / aerospace fields.

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Micro Friction Stir Welding Process: State of the Art

International Journal of Current Engineering and Technology ◽

10.14741/ijcet/v.8.2.15 ◽

2018 ◽

Vol 8 (02) ◽

Cited By ~ 1

Author(s):

Akshansh Mishra

Keyword(s):

Friction Stir Welding ◽

Copper Alloys ◽

Welding Process ◽

Dissimilar Materials ◽

Zinc Alloys ◽

Friction Stir ◽

Friction Stir Welding Process ◽

Thin Walled Structures ◽

Current State ◽

Mechanical Assemblies

IMicro friction stir welding (µFSW) process is mainly adapted from the Friction Stir Welding Process. This process is mainly used for joining dissimilar materials. Micro friction stir welding (µFSW) find its applications in thin walled structures, electrical, electronic and micro-mechanical assemblies. The significant challenges are faced when we downscale to achieve µFSW. This paper addresses the current state of the understanding and development of Micro friction stir welding. This paper further outlines the results achieved after Micro friction stir processing of Aluminium alloys, Copper alloys and Zinc alloys.

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Friction stir welding of aluminium alloys: An overview of experimental findings – Process, variables, development and applications

Proceedings of the Institution of Mechanical Engineers Part L Journal of Materials Design and Applications ◽

10.1177/1464420716689588 ◽

2017 ◽

Vol 233 (6) ◽

pp. 1191-1226 ◽

Cited By ~ 11

Author(s):

Pratik H Shah ◽

Vishvesh J Badheka

Keyword(s):

Friction Stir Welding ◽

Aluminium Alloys ◽

Copper Alloys ◽

Welding Process ◽

Dissimilar Materials ◽

Industrial Applications ◽

Future Research ◽

Welding Parameters ◽

Friction Stir ◽

Friction Stir Welding Process

The never ending appetite of the mankind to produce more and more competitive products results in continuous development of newer and newer manufacturing processes. One of such a kind, a solid state welding process highly appreciated for joining of a variety of aluminium and copper alloys, is friction stir welding. The process is also an accomplished method for joining dissimilar materials efficiently. The process finds its major application for joining hard-to-weld metals, especially the precipitation hardenable aluminium alloys and is widely adopted by industries for the welding of such aluminium alloys. However, the process has still not found an economical way for welding of steels and hence found limited applications in industries for welding steels. This paper aims at providing a comprehensive review of the work undertaken in the field of friction stir welding and provides an insight into the friction stir welding of aluminium alloys. The article pays critical attention and analytical evaluation of classification of aluminium alloys, friction stir welding process parameters, the mechanical testing and properties of the friction stir welding joints, macrostructure and microstructure evolution during friction stir welding, friction stir welding defects and industrial applications of the process. The friction stir welding process variants are discussed as well. Special accentuation has been given to (i) effect of friction stir welding parameters on the microstructure evolved and thus the ultimate mechanical properties (viz. tensile strength, hardness, fatigue strength, fracture toughness and residual stresses), (ii) the texture formation, microstructure refinement and the role of intermetallics. However, studies related to welding of dissimilar aluminium alloys, temperature, and heat transfer modeling and material flow are out of the scope of this paper. Finally, the directions of future research are examined.

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A new calculation method of viscoplastic heat production generated by plastic flow of friction stir welding process

Materials Chemistry and Physics ◽

10.1016/j.matchemphys.2021.124795 ◽

2021 ◽

pp. 124795

Author(s):

Fang Yan ◽

YuCun Zhang ◽

Jiuli Shen ◽

XianBin Fu ◽

Songtao Mi

Keyword(s):

Friction Stir Welding ◽

Plastic Flow ◽

Heat Production ◽

Calculation Method ◽

Welding Process ◽

Friction Stir ◽

Friction Stir Welding Process

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Application of Self-Made Dynamometer in Measuring Tool Forces in Friction Stir Welding Process

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.693.1339 ◽

2016 ◽

Vol 693 ◽

pp. 1339-1345

Author(s):

Hong Feng Wang ◽

J.L. Wang ◽

W.W. Song ◽

Dun Wen Zuo ◽

Q.Q. Zhu

Keyword(s):

Friction Stir Welding ◽

Design Principle ◽

Welding Process ◽

Cross Sensitivity ◽

Friction Stir ◽

Friction Stir Welding Process ◽

Measuring Tool ◽

Ring Deformation

In this paper, the dynamometer for measuring the forces of the tool in FSW process was designed. The design principle of the dynamometer was adopted octagonal ring deformation to get the forces in FSW process. The design dynamometer was calibrated, the result showed the linearity and cross sensitivity of the dynamometer in allowed range, the worked reliable of the dynamometer was good. It can be used to measure the forces in FSW process.

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