Development of Friction Stir Welding and Processing

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Tribology".

Deadline for manuscript submissions: closed (10 November 2021) | Viewed by 5375

Special Issue Editor


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Guest Editor
Department of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Interests: welding and joining; coatings; light weight; mechanical properties; polymer matrix composites; materials fabrication; metal matrix composites
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Special Issue Information

Dear Colleagues,

Friction stir welding (FSW), a mature solid-state joining method, has become a revolutionary welding technique over the past two decades, due to its energy efficiency, environmental friendliness and high-quality joints. FSW is highly efficient in the joining of Al alloys, Mg alloys, Ti alloys, polymers and other dissimilar materials. Derived from FSW, friction stir processing (FSP) is a solid-state processing technique to fabricate and modify the bulk materials, composites and surface coatings, with tailored microstructures and enhanced mechanical properties, via severe plastic deformation and low temperature. Recently, FSW and FSP techniques have gained considerable scientific and technological attention in several fields, including aerospace, railway, renewable energy and automobile. Therefore, we expect that these fields may significantly contribute to accelerating the research and development in the  areas of FSW and FSP.

This Special Issue focuses on new FSW/P technologies and basic investigations into the affecting factors and the underlying mechanisms for these technologies. The topics of interest for this Special Issue, in particular, include (but are not restricted to):

  • Novel FSW technologies via assisted energy to improve quality and efficiency;
  • Friction stir modifications of surfaces to generate functional surfaces for tribological, corrosion, and design properties;
  • Fabrication of new multifunctional materials based on severe plastic deformation and low temperature;
  • Joining of different material combinations and dissimilar materials with coatings to improve interfacial metallurgy and joining performance;
  • Control strategies for inherent issues in FSW/P area;
  • Additive manufacturing for adapted friction stir-based technologies;
  • Any other aspects of novel FSW and FSP technologies.

Prof. Dr. Yongxian Huang
Guest Editor

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Keywords

  • friction stir welding
  • friction stir processing
  • additive manufacturing
  • dissimilar materials
  • composites
  • coatings

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Published Papers (2 papers)

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Research

19 pages, 6713 KiB  
Article
Dissimilar Friction Stir Lap Welding of Al to Mg: Characteristic Signal, Microstructure and Mechanical Properties
by Yadong Zhao, Yalong Luo, Haixiao Zhang, Xuefeng Guo, Shuguang Wang, Hongbao Cui, Yangming Zhang, Zhigang Wang and Yafang Zhai
Coatings 2021, 11(1), 19; https://doi.org/10.3390/coatings11010019 - 25 Dec 2020
Cited by 2 | Viewed by 1848
Abstract
The spindle characteristic signal (forces and vibrations) at different friction stir lap welding (FSLW) parameters were studied. The result indicated that the spindle force and vibration have different trends with the change of welding parameters. For further study, the spindle dynamic performance evaluation [...] Read more.
The spindle characteristic signal (forces and vibrations) at different friction stir lap welding (FSLW) parameters were studied. The result indicated that the spindle force and vibration have different trends with the change of welding parameters. For further study, the spindle dynamic performance evaluation model by means of the Technique for Order Preference by Similarity to the Ideal Solution (TOPSIS method) was established. The model was used to calculate the relative approach degree B under different welding process parameters. The correlation between the characteristic signal and the joint properties was obtained. The model was validated by mechanical performance testing and microscopic observation. The results showed that the model evaluations were consistent with the experimental results. Full article
(This article belongs to the Special Issue Development of Friction Stir Welding and Processing)
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15 pages, 7340 KiB  
Article
Investigation of Weld Zone and Fracture Surface of Friction Stir Lap Welded 5052 Aluminum Alloy and 304 Stainless Steel Joints
by Veerendra Chitturi, Srinivasa Rao Pedapati and Mokhtar Awang
Coatings 2020, 10(11), 1062; https://doi.org/10.3390/coatings10111062 - 4 Nov 2020
Cited by 10 | Viewed by 2900
Abstract
Dissimilar material joining of aluminum and steel in the present scenario is an important criterion in the manufacturing industry, especially because of their low weight and technical performance. In the present investigation, AA5052 and SS304 are friction stir welded in lap configuration with [...] Read more.
Dissimilar material joining of aluminum and steel in the present scenario is an important criterion in the manufacturing industry, especially because of their low weight and technical performance. In the present investigation, AA5052 and SS304 are friction stir welded in lap configuration with different tilt angles, welding speed, pin depth, and tool rotational speed, with aluminum as the top plate. A maximum of 3.16 kN shear strength was achieved at 2.5° tilt angle when the penetration depth was 4.3 mm. The shear strength samples were studied for fracture analysis and it was found that fracture of the samples mainly occurred on the aluminum side and the fracture demonstrated both brittle and ductile failure, consisting of quasi-cleavage, trans-granular, and intergranular fracture areas. Field emission scanning electron microscope images at the interfacial region of the weld show that different intermetallic compounds were formed at various zones of the joint with respect to the change in process parameters. It was observed from energy dispersive spectroscopy that Al-rich intermetallic compounds were formed at the interfacial region of the welded samples. Amongst the process parameters, change in the tilt angle affected the weld zone significantly. The thickness of the intermetallic compound (IMC) layer formed with 800 and 1000 rpm at 2.5° tilt angle was between 2.5 and 3 μm, which resulted in achieving better joint strength. AlFe, AlFe3, Al13Fe4, and Al5Fe2 were the different intermetallic compounds detected using X-ray diffraction with different process parameters. The hardness of the samples ranged between (300 and 630) HV, which further supports the formation of AlFe and AlFe3 intermetallic compounds. Full article
(This article belongs to the Special Issue Development of Friction Stir Welding and Processing)
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