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Advances in Novel Welding Process of Metal Matrix Composites

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

Deadline for manuscript submissions: closed (31 March 2024) | Viewed by 879

Special Issue Editors


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Guest Editor
School of Materials Science and Engineering, Shandong University, Jinan, China
Interests: welding; additive manufacturing; metallurgy; micromechanical modelling; crystal plasticity

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Shandong University, Jinan, China
Interests: additive manufacturing; WAAM; arc welding

Special Issue Information

Dear Colleagues,

With the improvement of the new generation of equipment technology, the requirements for the performance of materials are becoming more and more stringent. Metal matrix composites (MMCs) not only have the characteristics of being lightweight and strong, but also have a series of advantages such as good fatigue resistance, creep resistance, heat resistance, wear resistance, high thermal conductivity, low thermal expansion, vibration reduction, and dimensional stability, which have become important areas of research and development of new materials. MMCs have been used in aerospace, automotive, and other manufacturing industries due to their excellent comprehensive properties. The huge difference in the properties of the reinforcements and the matrix alloys produces great difficulties in the welding of MMCs. Metal inert gas welding, gas tungsten arc welding, laser welding, electron beam welding, vacuum brazing, ultrasound-assisted brazing, transient liquid phase bonding, or resistance spot welding are the most popular joining procedures for MMCs. MMCs have recently been joined using a variety of solid-state joining processes, such as friction stir welding.

The goal of this Special Issue is to cover a wide range of subjects related to MMC welding techniques. It will also cover the current state of the art in a wide range of MMC-related fields. The following are some of the themes of interest; however, it is not an exhaustive list:

  • Developments of welding and joining processes of MMCs;
  • Mechanism of microstructural evolution;
  • Modelling and simulation of welding and joining processes;
  • Heat source–material interaction mechanism.

We would like to invite you to submit original research articles and reviews related to any of the topics mentioned above.

Dr. Shengli Li
Dr. Chunyang Xia
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

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

  • metal matrix composites
  • welding and joining processes
  • solid state techniques
  • heat source
  • microstructural evolution
  • modelling and simulation

Published Papers (1 paper)

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Research

16 pages, 6525 KiB  
Article
Effect of Heat Input on Microstructure and Properties of Laser-Welded 316L/In601 Dissimilar Overlap Joints in High-Temperature Thermocouple
by Hao Wang, Shengbin Zhao, Guifeng Luo, Zilin Tang, Xiang Li, Wenyuan Lu and Mingdi Wang
Materials 2023, 16(22), 7114; https://doi.org/10.3390/ma16227114 - 10 Nov 2023
Viewed by 646
Abstract
Heat input, a crucial factor in the optimization of high-temperature thermocouple laser welding, has a significant impact on the appearance and mechanical properties of dissimilar welded joints involving stainless-steel- and nickel-based alloys. This study focuses on laser overlay welding of austenitic stainless steels [...] Read more.
Heat input, a crucial factor in the optimization of high-temperature thermocouple laser welding, has a significant impact on the appearance and mechanical properties of dissimilar welded joints involving stainless-steel- and nickel-based alloys. This study focuses on laser overlay welding of austenitic stainless steels and nickel-based alloys. The findings indicate that an increase in heat input has a more pronounced effect on the penetration depth and dilution rate. Under high heat input, the weld has cracks, spatter, and other defects. Additionally, considerable amounts of chromium (Cr) and nickel (Ni) elements are observed outside the grain near the crack, and their presence increases with higher heat input levels. Phase analysis reveals the presence of numerous Cr2Fe14C and Fe3Ni2 phases within the weld. The heat input increases to the range of 30–35 J/mm, and the weld changes from shear fracture to tensile fracture. In the center of the molten pool, the Vickers hardness is greater than that of the base metal, while in the fusion zone, the Vickers hardness is lower than that of the base metal. The overall hardness is in a downward trend with the increase of heat input, and the minimum hardness is only 159 HV0.3 at 40 J/mm. The heat input falls within the range of 28–30 J/mm, and the temperature shock resistance is at its peak. Full article
(This article belongs to the Special Issue Advances in Novel Welding Process of Metal Matrix Composites)
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