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Applied Sciences
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Trends and Innovations in Laser Welding Techniques
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Trends and Innovations in Laser Welding Techniques

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Mechanical Engineering".

Deadline for manuscript submissions: closed (15 November 2021) | Viewed by 3637

Special Issue Editor

Prof. Dr. Ping Jiang

E-Mail Website
Guest Editor
School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Interests: laser welding; multi-energy field hybrid welding; intelligent monitoring for welding process; metamodel assisted engineering optimization

Special Issue Information

Dear Colleagues,

Laser welding has been extensively used in various industrial fields such as automobile, aerospace, electronics, and shipbuilding due to its advantages of large welding depth, small heat-affected zone, high productivity, good flexibility, low deformation, etc. Because the energy density of laser beams is very high, typically ranging from 100 to 1000 kW mm−2, the interaction between the laser beam and the welding material is rather strong, especially in the deep penetration welding of a thick plate. The strong interaction may result in process instability, and, thus, the formation of various defects such as porosity, spatter, cracking, and collapse. To increase process stability and suppress defects, understanding the underlying mechanisms and optimizing the welding process are essential. On the other hand, online monitoring and quality inspection of laser welding are essential for high-quality production.

This Special Issue “Trends and Innovations in Laser Welding Techniques” focuses on gathering the latest advances in laser welding techniques. The topics include, but are not limited to high-power laser welding, micro-laser welding, laser hybrid welding, and laser welding intelligent monitoring. Both experimental and theoretical papers are welcome.

We encourage you to take part in this Special Issue and look forward to your valuable contributions.

Prof. Dr. Ping Jiang
Guest Editor

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. Applied Sciences 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 2400 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

  • Laser welding
  • Welding process
  • High-power laser welding
  • Micro-laser welding
  • Laser hybrid welding
  • Online monitoring
  • Intelligent monitoring

Published Papers (1 paper)

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Research

22 pages, 6704 KiB  
Article
Prediction of Transient Temperature Distributions for Laser Welding of Dissimilar Metals
by Partha Sarathi Ghosh, Abhishek Sen, Somnath Chattopadhyaya, Shubham Sharma, Jujhar Singh, Shashi Parkash Dwivedi, Ambuj Saxena, Aqib Mashood Khan, Danil Yurievich Pimenov and Khaled Giasin
Appl. Sci. 2021, 11(13), 5829; https://0-doi-org.brum.beds.ac.uk/10.3390/app11135829 - 23 Jun 2021
Cited by 11 | Viewed by 3138
Abstract
Distribution of temperature during the welding process is essential for predicting and realizing some important welding features such as microstructure of the welds, heat-affected zone (HAZ), residual stresses, and their effects. In this paper, a numerical model was developed using COMSOL Multiphysics of [...] Read more.
Distribution of temperature during the welding process is essential for predicting and realizing some important welding features such as microstructure of the welds, heat-affected zone (HAZ), residual stresses, and their effects. In this paper, a numerical model was developed using COMSOL Multiphysics of dissimilar laser welding (butt joint) of AISI 316L and Ti6Al4V thin sheet of 2.5 mm thickness. A continuous mode (CW) fiber laser heat source of 300 W laser power was used for the present study. A time-dependent prediction of temperature distributions was attempted. The heat source was assumed as a Hermit–Gaussian analytical function with a moving velocity of 120 mm/min. Both convective and radiant heat loss and phase change of the materials were considered for the analysis. In addition, variation of temperature-dependent material properties was also considered. The maximum and minimum temperature for the two materials at different times and the temperature in the different penetration depths were also predicted. It was found that the average temperature that can be achieved in the bottom-most surface near the weld line was more than 2400 K, which justifies the penetration. Averages of maximum temperatures on the weld line at different times at the laser spot irradiation were identified near 3000 K.The temperature fluctuation near the weld line was minimal and decreased more in the traverse direction. Scanning with a displaced laser relative to the interface toward the Ti6Al4V side reduces the maximum temperature at the interface and the HAZ of the 316L side. All of these predictions agree well with the experimental results reported in current literature studies. Full article
(This article belongs to the Special Issue Trends and Innovations in Laser Welding Techniques)
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