Advances in Welding and Joining of Alloys and Steel

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Welding and Joining".

Deadline for manuscript submissions: 31 August 2025 | Viewed by 403

Special Issue Editor


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Guest Editor
Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China
Interests: low-alloy steel; stainless steel; welding; physical metallurgical behavior
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Special Issue Information

Dear Colleagues,

Advanced alloy materials and steel materials are widely used in aerospace, marine engineering, the construction industry, and other fields. A considerable portion of engineering construction is carried out through welding or riveting methods. The most critical aspect ensuring the mechanical and service performance of the connection area to meet the technical requirements of high safety and a long lifespan. During welding or other joining processes, materials such as alloys and steels are subject to external heating or processing effects, causing changes in the matrix microstructure and properties of the materials. Therefore, it is necessary to conduct comprehensive research on the welding and joining behavior of materials under different working conditions, including but not limited to the microstructural evolution, changes in mechanical properties, impact toughness, fracture toughness, fatigue life, corrosion resistance, and other indicators.

Dr. Xuelin Wang
Guest Editor

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Keywords

  • welding metals
  • joining
  • mechanical properties
  • HSLA steel
  • fatigue performance
  • low-alloy steel
  • stainless steel
  • welding
  • physical metallurgical behavior

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Published Papers (1 paper)

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Research

22 pages, 7759 KiB  
Article
Numerical Analysis of Thermal and Flow Behaviors with Weld Microstructures During Laser Welding with Filler Wire for 2195 Al-Li Alloys
by Dejun Liu, Qihang Xv, Gan Tian, Ling Zhao, Xinzhi Yang and Maochuan Li
Metals 2025, 15(4), 348; https://doi.org/10.3390/met15040348 - 23 Mar 2025
Viewed by 189
Abstract
This study investigates the effects of heat transfer and molten pool flow behavior on the final structure of laser filler wire welds, aiming to improve weld quality. Laser filler wire welding experiments and numerical simulations were performed on 2195 Al-Li alloy workpieces with [...] Read more.
This study investigates the effects of heat transfer and molten pool flow behavior on the final structure of laser filler wire welds, aiming to improve weld quality. Laser filler wire welding experiments and numerical simulations were performed on 2195 Al-Li alloy workpieces with varying welding parameters. Numerical simulation of the heat transfer and flow in the molten pool was carried out using the CFD method, and the moving filler wire was introduced from the computational boundary by secondary development. Simulation results indicated that reducing welding speed and increasing wire feeding rate enhanced the cooling rate of the weld. Additionally, energy absorbed by the filler wire contributed between 6% and 16% of the total energy input during the liquid bridge transition. Comparing experimental and simulation data revealed that the cooling rate significantly affected the weld’s micro-structure and hardness. Notably, the formation of the equiaxed grain zone (EQZ) was crucial for weld performance. Excessive cooling rates hindered EQZ formation, reducing flow in this critical region. These findings offer valuable insights for optimizing welding parameters to enhance weld quality and performance. Full article
(This article belongs to the Special Issue Advances in Welding and Joining of Alloys and Steel)
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