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Advanced Materials Joining and Manufacturing Techniques

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Manufacturing Processes and Systems".

Deadline for manuscript submissions: 20 November 2024 | Viewed by 1151

Special Issue Editors


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Guest Editor
Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON, Canada
Interests: materials processing (processing, structure, properties relationships); welding and joining; additive manufacturing; alloy development (solidification cracking)

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Guest Editor
Centre for Advanced Materials Joining, Department of Mechanical & Mechatronics Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
Interests: welding and joining; laser welding; laser brazing; laser surface engineering; additive manufacturing

Special Issue Information

Dear Colleagues,

Materials joining and welding is an essential component of manufacturing technology and is one of the main ways to manufacture parts for a wide range of products from giant structures to micro and nano devices such as pipelines, aircrafts, automobiles, medical devices and microelectronics. With the continuous emergence of engineering materials and applications, various advanced technologies have been developed on a macro and micro scale. For example, weight reduction without compromising any safety and performance criteria with reasonable cost is one priority for automotive industry which enables the development of dissimilar materials joining. Brazing technologies have attracted interest in recent years due to their ability to reduce some defects that occur during fusion welding of zinc coated steel. Joining related to shape memory alloy or high-entropy alloy have been developed and evaluated. Advances in welding and joining help to achieve unique joint properties, join complex structures or materials, reduce costs, improve productivity and quality, and select suitable material for new products.

This Special Issue “Advanced Materials Joining and Manufacturing Techniques” aims to summarize recent advances in all aspects of welding and joining, including microstructure, mechanical properties, corrosion performance, and other properties. Studies on the material characterization of the joint and technique development are of interest. The main content of this Special Issue includes, but is not limited to, arc welding, laser welding, friction stir welding, micro joining, additive manufacturing (deposition with wire or powder), and other relevant advanced techniques.

Dr. Michael Benoit
Dr. Xiaoye Zhao
Guest Editors

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • fusion welding
  • brazing
  • solid-state welding
  • additive manufacturing
  • dissimilar materials joining
  • micro joining

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Published Papers (1 paper)

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Research

23 pages, 28801 KiB  
Article
Effects of Heat Input and Intertrack Overlap on the Microstructure and Properties of Inconel 686 Weld Overlays
by Seyedmohammad Tabaie, Zahra Khodamoradi, Trevor Greene and Michael J. Benoit
Materials 2024, 17(13), 3315; https://doi.org/10.3390/ma17133315 - 4 Jul 2024
Viewed by 793
Abstract
The objective of this study was to investigate how weld overlays with nickel superalloys are important for the integrity, due the high temperatures and corrosive environments that can be experienced in mineral processing environments, of mining and processing equipment. The Ni-Cr-Mo superalloy Inconel [...] Read more.
The objective of this study was to investigate how weld overlays with nickel superalloys are important for the integrity, due the high temperatures and corrosive environments that can be experienced in mineral processing environments, of mining and processing equipment. The Ni-Cr-Mo superalloy Inconel 686 overlays are fabricated through automatic gas metal arc welding with variations in arc voltage and travel speed (i.e., heat input), and they have overlap between adjacent weld tracks for applications in the mining and minerals sector. The impact of variations in the process parameters and the size of the weld overlapping on the dilution, solidification morphology, microsegregation, and microhardness were investigated. Both geometric and chemical composition definitions were used to quantify the extent of the weld dilution. Subsequently, the weld geometry and dilution were correlated with the solidification microstructure and phase transformations. The maximum dilutions were measured to be 13.63% (1/2 overlap, 5.96 kJ·cm−1) and 15.39% (1/3 overlap, 4.77 kJ·cm−1), which shows that less of an overlap increases the dilution level. Scanning electron microscopy and chemical composition analysis revealed that an increase in weld heat input and dilution level led to higher levels of microsegregation for Mo and Cr, as well as the volume fraction of Mo- and Cr-rich phases in the interdendritic/intercellular regions in the overlay layer. Analysis of the weld overlays in the current study revealed strong and unprecedented connections between the weld overlay process conditions, the resultant metallurgy (i.e., dendrite arm spacing, microsegregation, and phase formation), and the hardness of the overlay. It was concluded that the optimal weld overlays in the processing window studied in this investigation were fabricated at mid-level heat inputs (i.e., 4–5 kJ·cm−1) and a 1/2 track overlap. Full article
(This article belongs to the Special Issue Advanced Materials Joining and Manufacturing Techniques)
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