Welding and Friction Stir Processes for Composite Materials

A special issue of Journal of Composites Science (ISSN 2504-477X). This special issue belongs to the section "Composites Manufacturing and Processing".

Deadline for manuscript submissions: 28 February 2025 | Viewed by 2201

Special Issue Editor


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Guest Editor
Department of Mechanical Engineering, College of Engineering, University of Texas of the Permian Basin, Odessa, TX 79762, USA
Interests: advanced welding techniques; friction stir processing and FSW; composites; addtive manufacturing; material properties

Special Issue Information

Dear Colleagues,

Composites are renowned for their superior strength-to-weight ratio and versatility, but they present unique challenges in joining techniques due to their distinct material properties. This Special Issue is committed to addressing these challenges by showcasing innovative methodologies, optimization strategies, and case studies focused on welding and stir-friction processes for composite materials.

This Special Issue will explore a broad spectrum of topics, including the development of novel welding techniques tailored for composites, advancements in friction stir welding (FSW) processes, solid-state methods for enhancing composites and hybrid material properties, and their integration into industrial applications. We also invite contributions that examine the impact of these processes on the mechanical properties, durability, and overall performance of composite joints.

In summary, by bringing together leading experts and presenting cutting-edge research, this Special Issue aims to provide a comprehensive overview of current trends, challenges, and future directions in the field. We encourage researchers to submit research/review articles on knowledge and techniques related to composite welding and friction stirring processes.

Dr. Srinivasa Rao Pedapati
Guest Editor

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Keywords

  • composite materials
  • welding techniques
  • friction stir welding (FSW)
  • joining processes
  • material properties
  • stir processing
  • composite joints
  • process optimization
  • industrial applications

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Published Papers (2 papers)

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Research

17 pages, 15285 KiB  
Article
Resistance Welding of Carbon Fiber Reinforced Vitrimer Composites
by Patricio Martinez and Steven Nutt
J. Compos. Sci. 2024, 8(12), 498; https://doi.org/10.3390/jcs8120498 - 1 Dec 2024
Viewed by 800
Abstract
The welding behavior of prototype vitrimer composites with respect to adjustable parameters and protocols is investigated, and a method for resistance welding of vitrimer composites directly adapted from the welding of thermoplastic composites is described. Adherend laminates are positioned on either side of [...] Read more.
The welding behavior of prototype vitrimer composites with respect to adjustable parameters and protocols is investigated, and a method for resistance welding of vitrimer composites directly adapted from the welding of thermoplastic composites is described. Adherend laminates are positioned on either side of a matrix-saturated carbon fiber heating element, through which current is driven, and resistance heating welds the adherends and heating element together, forming a single lap joint. Weld strengths matched or exceeded the strength of composite parts produced using the manufacturer-recommended consolidation method (12.0 ± 2.6 MPa vs. 8.4 ± 0.6 MPa). Furthermore, repeating the welding process yielded greater shear strength, withstanding up to five weld–break–reweld cycles with an average increase of 4.6 ± 1.5 MPa or 65% compared to the first weld. The findings from resistance weld experiments highlight the suitability of vitrimer matrix composites for repair. Finally, a process for reversing a welded joint was shown, demonstrating the potential for vitrimers for temporary joining and rejoining. Full article
(This article belongs to the Special Issue Welding and Friction Stir Processes for Composite Materials)
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20 pages, 27328 KiB  
Article
Enhancing Wear Resistance of AA7075/SiC/Fly Ash Composites Through Friction Stir Processing
by Namdev Ashok Patil, Santoshi Pedapati and Srinivasa Rao Pedapati
J. Compos. Sci. 2024, 8(11), 461; https://doi.org/10.3390/jcs8110461 - 7 Nov 2024
Viewed by 856
Abstract
In this study, the wear behavior of AA7075/silicon carbide/fly ash hybrid surface composites processed with a clean and green friction stir processing technique was investigated. The microstructure of the composites was investigated to determine the particle dispersion. Wear tests using a pin-on-disc tribometer [...] Read more.
In this study, the wear behavior of AA7075/silicon carbide/fly ash hybrid surface composites processed with a clean and green friction stir processing technique was investigated. The microstructure of the composites was investigated to determine the particle dispersion. Wear tests using a pin-on-disc tribometer were conducted, and wear tracks and debris analyses were conducted using scanning electron microscopic imaging, EDX, and mapping. The wear rate of the composites was higher in the case of the composites with agglomerated zones, which led to the loose SiC/fly ash particles pulling out during the action of dry sliding. However, on the other hand, the wear resistance was improved in the composites with uniformly distributed SiC/fly ash particles. The hard SiC/fly ash particles acted as optimized load-bearing asperities and induced more wear resistance during the action of dry sliding against the mating plate, which was made of mild steel. In the case of the well-dispersed composites, the wear mechanisms shifted from fretting fatigue and adhesion to abrasion. The presence of a high Fe content in the wear debris was confirmed in the most wear-resistant composite sample, S-20, which was produced with the following parameters: tool rotation (w) of 1000 rpm, tool traverse (v) of 40 mm/min, hybrid ratio (HR) of 75:25, and a volume percentage of reinforcements (vol.%) of 8. Full article
(This article belongs to the Special Issue Welding and Friction Stir Processes for Composite Materials)
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