Laser Processing and Surface Modification of Materials

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: closed (31 January 2023) | Viewed by 1826

Special Issue Editors

School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China
Interests: additive manufacture; titanium alloys; fatigue performance characterization
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Associate Professor, School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Interests: additive manufacturing
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Using laser sources for material processing, which nowadays includes laser cutting, laser welding, laser metal deposition and selective laser melting, can be dated back to approximately the 1960s. It is now becoming a popular approach for manufacturing and processing components with complexities such as drilling holes, engraving marks and fabricating complex parts, with the market growing rapidly.

Advanced laser-based processing techniques such as selective laser melting (which is actually no longer considered a ‘new’ laser-based additive manufacturing technique) were developed and commercialized with great success. However, the underlying fundamental mechanisms still need further exploration to suit the ongoing demands from the industries for better and stable products.

This Special Issue, titled ‘Laser Processing and Surface Modification of Materials’, will emphasize the ongoing needs for the 1. innovation; 2. development; and 3. fundamental research of laser processing technology. We hope to attract articles in this field with topics including (but not limited to): 1. Recent works addressing the correlation between processing, microstructure and performance of laser processed materials; 2. research into the technical aspects of laser processing (for instance, laser surface re-melting); 3. post treatments (such as heat treatments) for laser-processed materials; and 4. reviews covering different aspects of laser processing. Technical papers regarding other heat sources (for instance, electron-beam-based additive manufacturing techniques) are also welcome, since the underlying mechanism that determine the microstructure evolution could be indicative of laser-processed materials.

Dr. Kai Zhang
Dr. Juan Hou
Guest Editors

Manuscript Submission Information

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Keywords

  • laser processing
  • additive manufacturing
  • selective laser melting
  • laser metal deposition
  • laser welding
  • laser cutting
  • heat treatment
  • laser process monitoring for quality control and assurance

Published Papers (1 paper)

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Research

17 pages, 12295 KiB  
Article
Effect of Filler Wire on Mechanical Properties, Microstructure and Natural Aging Behavior of 2A55 Al-Li Alloy TIG Welded Joint
by Zhihao Liu, Pingli Liu, Hui Xiang, Yang Huang, Pengcheng Ma, Yonglai Chen, Jinfeng Li and Ruifeng Zhang
Metals 2023, 13(2), 347; https://doi.org/10.3390/met13020347 - 9 Feb 2023
Cited by 3 | Viewed by 1345
Abstract
2A55 Al-Li alloy is considered to have potential applications in the manufacture of fuel tanks for aerospace vehicles. However, the composition design of filler wires for 2A55 Al-Li alloy TIG welding has not been fully studied. This work focuses on the mechanical properties [...] Read more.
2A55 Al-Li alloy is considered to have potential applications in the manufacture of fuel tanks for aerospace vehicles. However, the composition design of filler wires for 2A55 Al-Li alloy TIG welding has not been fully studied. This work focuses on the mechanical properties and microstructure of 2A55 Al-Li alloy TIG welded joints obtained using 2A55 alloy and Al-8Cu filler wire that was designed for this work, as well as the effects brought about by natural aging on them. When filler wire with higher Zr and Ti content was used, the weld grain was significantly refined. Due to the difference in the Cu content of filler wire, the formed Cu-rich phases in welds are significantly different, showing a grid-like distribution in the Al-8Cu weld compared to the dispersed distribution in the 2A55 weld. After welding, the lack of dominant strengthening precipitates caused a sharp softening of the welds. However, Li and Cu atoms dissolved in the Al matrix can precipitate fine and dispersed Al3Li particles and GPZs by natural aging to strengthen the welds. After natural aging, the yield strength (YS) of the 2A55 joint increased by 24.1% compared with the 14.7% improvement of the Al-8Cu joint. Full article
(This article belongs to the Special Issue Laser Processing and Surface Modification of Materials)
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