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Metals
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Numerical Analysis of Welding and Processing
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Numerical Analysis of Welding and Processing

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Computation and Simulation on Metals".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 8569

Special Issue Editor

Prof. Dr. Jerzy Winczek

E-Mail Website
Guest Editor
Faculty of Mechanical Engineering and Computer Science, Department of Technology and Automation, Czestochowa University of Technology, 19 Armii Krajowej St., 42-200 Czestochowa, Poland
Interests: thermal and metallurgical fundamentals of welding; theory, modelling and experimental investigation of welding processes; technological aspects of welding, surfacing by welding (hardfacing, rebuilding); thermomechanical states of welding, laser and heat treatment processes (temperature field, phase changes, strains and stresses, analytical and numerical methods, modelling); mechanics of materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Numerical modeling of phenomena occurring in the technological processes of metals and their alloys is increasingly attracting the interest of scientists, but also being applied in engineering practice. Without market expectations, such advanced engineering packages as ANSYS, ABAQUS, SYSWELD, ADINA, WELDSIM, SIMUFACT WELDING, SOLID WORKS and many more would not have been created.

The progress in the welding methods, material engineering, and computer methods over the last few years demands the numerical analysis of phenomena occurring in welding, as well as in related processes.

With regard to welding processes, the main directions of research are the fields of temperature, phase transformations, strains and stresses, and distortions, which have a direct impact on the strength and utility of welded constructions. Simulations are carried out taking into account the impact of welding defects on the quality of the welded joint.

Many publications also refer to the analysis of the transfer of molten electrode material to the weld pool and liquid metal movements in that weld pool.

Another important area of research is the optimization of welding processes and the the relevant parameters of the welding procedure, such as heat input, welding parameters, bead geometry or weld sequence.

Particularly interesting for researchers are modern technologies such as friction welding and additive manufacturing (e.g., laser sintering).

The purpose of this Special Issue is to present the latest developments in the field of research on welding techniques of metals and alloys, as well as other technological processes involving heat in the manufacturing process.

The main topics of interest include but are not limited to the following processes:

  • Welding (GMA, GTA, P-GMAW,SAW, ESW, PAW, etc.);
  • Laser welding;
  • Hybrid welding;
  • Rapid welding prototyping;
  • Friction welding;
  • Friction stir welding and processing;
  • Laser and heat treatment;
  • Spraying;
  • Plasma cutting;
  • Machining;
  • Coating;
  • Additive manufacturing.

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. Metals is an international peer-reviewed open access monthly 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

  • numerical modeling
  • simulation
  • welding
  • temperature field
  • phase transformation
  • structure
  • strains
  • stresses
  • distortions
  • cracks
  • fatigue

Published Papers (3 papers)

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Research

21 pages, 6506 KiB  
Article
Formability Prediction of Laser-Welded Stainless Steel AISI 304 and AISI 430
by Emil Evin and Miroslav Tomáš
Metals 2022, 12(1), 54; https://doi.org/10.3390/met12010054 - 27 Dec 2021
Cited by 7 | Viewed by 3448
Abstract
The effect of laser welding on the mechanical properties and the prediction of formability for austenitic stainless steel AISI 304 and ferritic steel AISI 430 when welded by a YLS-5000 fiber laser, were studied in the paper. The microstructure of the welded joint [...] Read more.
The effect of laser welding on the mechanical properties and the prediction of formability for austenitic stainless steel AISI 304 and ferritic steel AISI 430 when welded by a YLS-5000 fiber laser, were studied in the paper. The microstructure of the welded joint was analyzed using light microscopy. The mechanical properties were determined by static tensile testing. The forming limit diagrams were produced from notched samples at R5, R17, and R25 mm. The hardness values of the welded joint and the base material were determined using the Vickers method. Samples made of AISI 430 showed that the formability suffered due to laser welding. Longitudinal coarse ferrite grains were observed in the microstructure of the AISI 430 weld metal. The coarse-grained structure of the welded joint and the continuous interface along the centerline caused the failure of the AISI 430 laser-welded samples at significantly lower actual stress and strain values than were required to break the base material. No significant changes in the formability were observed in the AISI 304 samples after laser welding. The growth of dendrites was observed in the microstructure of the AISI 304 welded joint in a direction towards the centerline of the welded joint. A comparison of the experimentally determined FLD0 values and the values calculated from predictive equations showed that a better agreement was achieved for uniform elongation than for the strain hardening exponent. The manufacturability and economic efficiency of selected parts of an exhaust system by hydromechanical drawing were evaluated on the basis of the process capability index Cpk. Full article
(This article belongs to the Special Issue Numerical Analysis of Welding and Processing)
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15 pages, 11510 KiB  
Article
Numerical Simulation of a High-Speed Impact of Metal Plates Using a Three-Fluid Model
by Petr Chuprov, Pavel Utkin and Svetlana Fortova
Metals 2021, 11(8), 1233; https://doi.org/10.3390/met11081233 - 3 Aug 2021
Cited by 4 | Viewed by 1991
Abstract
The process of wave formation at the contact boundary of colliding metal plates is a fundamental basis of explosive welding technology. In this case, the metals are in a pseudo-liquid state at the initial stages of the process, and from a mathematical point [...] Read more.
The process of wave formation at the contact boundary of colliding metal plates is a fundamental basis of explosive welding technology. In this case, the metals are in a pseudo-liquid state at the initial stages of the process, and from a mathematical point of view, a wave formation process can be described by compressible multiphase models. The work is devoted to the development of a three-fluid mathematical model based on the Baer–Nunziato system of equations and a corresponding numerical algorithm based on the HLL and HLLC methods, stiff pressure, and velocity relaxation procedures for simulation of the high-speed impact of metal plates in a one-dimensional statement. The problem of collision of a lead plate at a speed of 500 m/s with a resting steel plate was simulated using the developed model and algorithm. The problem statement corresponded to full-scale experiments, with lead, steel, and ambient air as three phases. The arrival times of shock waves at the free boundaries of the plates and rarefaction waves at the contact boundary of the plates, as well as the acceleration of the contact boundary after the passage of rarefaction waves through it, were estimated. For the case of a 3-mm-thick steel plate and a 2-mm-thick lead plate, the simulated time of the rarefaction wave arrival at the contact boundary constituted 1.05 μs, and it was in good agreement with the experimental value 1.1 μs. The developed numerical approach can be extended to the multidimensional case for modeling the instability of the contact boundary and wave formation in the oblique collision of plates in the Eulerian formalism. Full article
(This article belongs to the Special Issue Numerical Analysis of Welding and Processing)
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22 pages, 31304 KiB  
Article
Numerical Analysis of Experiments on Damage and Fracture Behavior of Differently Preloaded Aluminum Alloy Specimens
by Michael Brünig, Moritz Zistl and Steffen Gerke
Metals 2021, 11(3), 381; https://doi.org/10.3390/met11030381 - 25 Feb 2021
Cited by 17 | Viewed by 2383
Abstract
A large amount of experimental studies have shown significant dependence of strength of ductile metals on stress state and stress history. These effects have to be taken into account in constitutive models and corresponding numerical analysis to be able to predict safety and [...] Read more.
A large amount of experimental studies have shown significant dependence of strength of ductile metals on stress state and stress history. These effects have to be taken into account in constitutive models and corresponding numerical analysis to be able to predict safety and lifetime of engineering structures in a realistic manner. In this context, the present paper deals with numerical analysis of the influence of the load path on damage and fracture behavior of aluminum alloys. A continuum damage model is discussed taking into account the effect of stress state and loading history on damage criteria and on evolution equations of damage strains. Experiments with the biaxially loaded H-specimen have been performed and different preloading histories have been taken into account. Evolution of strain fields is monitored by digital image correlation, and fracture modes are visualized by scanning electron microscopy (SEM). In addition, numerically predicted stress states are used to explain occurrence of different stress-state- and preloading-path-dependent localization behavior in critical specimens areas, as well as damage and fracture modes, revealed by SEM. The experiments with newly developed biaxially loaded specimens and corresponding numerical simulations show that the preloading history remarkably affects the occurrence of width and orientation of localized strain fields, as well as evolution of damage mechanisms and fracture modes. Therefore, characterization of materials must be based on an enhanced experimental program including biaxial tests with different loading histories. The observed damage and failure behavior can be predicted by the proposed continuum model taking into account stress-state-dependent damage criteria and damage strains. Full article
(This article belongs to the Special Issue Numerical Analysis of Welding and Processing)
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