Article
Materials Science, Multidisciplinary
Miguel Delgado-Pamanes, Jesus Alvarez-Montufar, Luis Reyes-Osorio, Carlos Garza, Miguel Surez-Rosales, Jose Chvez-Alcal
Summary: Zn-Al structures have various advantages, and selecting appropriate processing parameters is crucial for the quality of friction-stir welding. In this study, the optimal processing parameters of Zn-22Al-2Cu eutectoid alloy were determined through experiments and numerical simulations. The mechanical properties and microstructure of the welded joints were analyzed, showing that joints with a grooved surface at 1100 rpm exhibited superior mechanical properties and no tunneling defects.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Metallurgy & Metallurgical Engineering
Valeh Talebsafa, Mohammad Yousefieh, Ehsan Borhani, Ehsan Gharibshahiyan
Summary: In this paper, the impact of friction stir welding (FSW) on the microstructure, thermal and mechanical properties of ultrafine-grained Al-Sc alloy sheets obtained by accumulative roll bonding (ARB) method was simulated. The effectiveness of FSW parameters, including tool rotational speed, welding speed, and tool tilt angle, was investigated to find the optimal parameters. The numerical modelling using SYSWELD and Visual-Environment software was validated by experimental results. The findings showed that FSW is a beneficial process to maintain the ultrafine-grained microstructure and high mechanical properties, with tool rotational speed having the biggest impact. The highest hardness and yield strength of the Al-Sc sheets were achieved under the optimal parameters of 700 r/min, 80 mm/min, and 3 degrees for tool rotational speed, welding speed, and tool tilt angle, respectively.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2023)
Article
Optics
Kangmei Li, Xingzhe He, Le Li, Liuyong Yang, Jun Hu
Summary: This study investigates the effect of laser peening on the residual stress distribution in the welding zone of aluminium-lithium alloy. The optimal combination of laser peening parameters is determined through numerical simulation and experimental verification.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Thermodynamics
Darko Veljic, Marko Rakin, Aleksandar Sedmak, Nenad Radovic, Bojan Medjo, Mihailo Mrdak, Darko Bajic
Summary: This paper analyzes the influence of friction stir welding parameters on the thermo-mechanical behavior of the material. By using a finite element model and the Johnson-Cook material model, the effects of rotating speed and welding speed on heat generation are studied. It is found that improper selection of welding parameters can result in defects in the model.
Article
Mathematics, Applied
H. Venghaus, M. Chiumenti, J. Baiges, D. Juhre, I. Castanar
Summary: A novel Adaptive Formulation Refinement (AFR) strategy is introduced for Friction Stir Welding (FSW) problems. By switching between two mixed formulations based on a posteriori error estimation, AFR achieves high accuracy in the thermo-mechanically affected zone (TMAZ) and computational efficiency elsewhere. AFR preserves the use of linear elements, accurately captures the incompressible flow, and avoids remeshing.
FINITE ELEMENTS IN ANALYSIS AND DESIGN
(2023)
Article
Chemistry, Multidisciplinary
Syed Farhan Raza, Muhammad Amjad, Muhammad Salman Habib, Naveed Ahmed, Fahid Riaz
Summary: This research investigates the effects of friction stir welding (FSW) parameters on the weld temperature, strength, and hardness of yellow brass 405-20. The study includes both numerical simulations, such as transient thermal analysis and static structural analysis, and empirical validations. The results show a maximum temperature of 598 degrees C during FSW, a joint strength of 228 MPa, and underlying mechanisms for the lower weld strength compared to the parent material.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Multidisciplinary
Behzad Sadeghian, Aboozar Taherizadeh, Masoud Atapour, Navid Saeidi, Amir Alhaji
Summary: The study used the phase-field method to simulate the microstructure evolution during friction stir welding, finding that the rotating speed plays a significant role in the formation of the final microstructure. It was observed that the grain size distribution, nucleation and growth rate, as well as the grain boundary fraction are interdependent and affected by the rotating speed in the FSW process.
MECHANICS OF MATERIALS
(2021)
Article
Engineering, Mechanical
Abhishek Kumar Singh, Lalit Kaushik, Jaiveer Singh, Hrishikesh Das, Mounarik Mondal, Sung-Tae Hong, Shi-Hoon Choi
Summary: The microstructure, texture, and deformation history of friction-stir-processed commercially pure titanium were investigated. It was found that a equiaxed submicron grain microstructure developed in the stir zone, and the texture evolution was highly dependent on the thermo-mechanical history. Prismatic and pyramidal slip systems and compression twinning were found to be the dominant deformation modes in the stir zone.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Materials Science, Multidisciplinary
M. H. Dastmard, R. Ansari, S. Rouhi
Summary: This article investigates the impact of nanotubes made from group IV elements with different lengths and volume fractions on the axial elastic modulus of the epoxy matrix. Among the nanotubes considered, carbon nanotubes were found to have the most significant effect on strengthening the epoxy matrix.
MECHANICS OF MATERIALS
(2021)
Article
Chemistry, Physical
Jiamei Guo, Zheng Jia
Summary: It has been well established that lithiation of crystalline silicon occurs through a one-step two-phase mechanism, while other high-capacity anode materials go through a two-step charging process. Little attention has been given to the charging mechanics of anodes undergoing two-step charging, but a model developed in this study using the finite element method reveals that the unique charge-carrier concentration profile and elastic softening of anode materials lead to effective stress mitigation during the second step of charging, resulting in tough charging behavior.
JOURNAL OF POWER SOURCES
(2021)
Article
Materials Science, Multidisciplinary
Alexander Kalinenko, Vasiliy Mishin, Ivan Shishov, Sergey Malopheyev, Ivan Zuiko, Vseslav Novikov, Sergey Mironov, Rustam Kaibyshev, Sheldon Lee Semiatin
Summary: The relationship between the temperature conditions during friction-stir welding, the stir-zone microstructure, and the thermal stability of welded aluminum-alloy 6061 joints was investigated. It was found that the stir-zone microstructure was unstable against abnormal grain growth during post-weld solution annealing. The abnormal grain growth developed rapidly, nearly completing during the heating process. Annealing behavior followed Humphrey's cellular-growth model in all welded conditions. Low-heat-input led to a competition between normal grain growth and abnormal grain growth, resulting in relatively small final grain size. High-heat-input conditions provided microstructural stability but triggered catastrophic grain coarsening. Remarkably, abnormal grain growth led to a rotation of the crystallographic texture in the stir zone.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Physical
Debtanay Das, Swarup Bag, Sukhomay Pal, Abhay Sharma
Summary: Despite the limited research on numerical simulation of friction stir welding (FSW) of dissimilar materials, we conducted a numerical study to predict defects and tool wear. Our model successfully predicted various defects and revealed the importance of plate position in defect formation. By considering wear-induced changes in tool dimensions, the model captured the formation of defects like surface tunnels.
Article
Engineering, Marine
M. Hashemzadeh, Y. Garbatov, C. Guedes Soares, A. O'Connor
Summary: Friction stir welding has shown significant improvement in steel welding, with experimental and numerical analyses confirming the accuracy of the welding-induced residual stress model, and a sensitivity analysis being conducted on essential governing parameters.
SHIPS AND OFFSHORE STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Murat Turkan, Ozler Karakas
Summary: This study investigates the formation of welding defects during the joining of AZ61 magnesium alloy using friction stir welding. A 3D finite element model is created and analyzed, and is validated with experimental results. The study finds that insufficient heat input leads to weld defects in the form of void when the ratio of tool rotational speed to tool feed rate is 2, while sufficient heat input prevents welding defects when the ratio is 3. The numerical model allows for the determination of welding defects and accurate prediction of weld seam geometry in a short processing time.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Debtanay Das, Swarup Bag, Sukhomay Pal
Summary: Friction stir welding (FSW) often faces surface and subsurface defects. Numerically modeling these defects is costly. This study investigates the influence of the mass scaling factor (MSF) on defect formation in the FSW process. By tailoring the MSF, the computational time can be minimized. The developed numerical model demonstrates reliability and provides guidance for model parameter selection.
MATERIALS TODAY COMMUNICATIONS
(2023)
Review
Computer Science, Interdisciplinary Applications
Bahman Meyghani, M. Awang
ARCHIVES OF COMPUTATIONAL METHODS IN ENGINEERING
(2020)
Article
Materials Science, Multidisciplinary
B. Meyghani, M. Awang, S. Emamian, B. Plank, H. Christoph, K. S. Siow
MATERIALWISSENSCHAFT UND WERKSTOFFTECHNIK
(2019)
Article
Materials Science, Multidisciplinary
B. Meyghani, M. Awang, P. Bokam, B. Plank, C. Heinzl, K. S. Siow
MATERIALWISSENSCHAFT UND WERKSTOFFTECHNIK
(2019)
Review
Engineering, Mechanical
Bahman Meyghani, Chuansong Wu
CHINESE JOURNAL OF MECHANICAL ENGINEERING
(2020)
Article
Materials Science, Multidisciplinary
B. Meyghani, M. B. Awang, C. S. Wu
MATERIALWISSENSCHAFT UND WERKSTOFFTECHNIK
(2020)
Article
Engineering, Manufacturing
Bahman Meyghani
Summary: The study introduces the application of Eulerian based CSM models in numerical modeling of friction stir welding, implementing a modified friction model to achieve successful simulation of partial sliding/sticking conditions and accurate prediction of stress, material flow, heat flux, equivalent plastic strain, and temperature. The results demonstrate correlation with experiments and existing literature, showcasing the potential of the modified friction model in improving accuracy and reliability of CSM models.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Materials Science, Multidisciplinary
Bahman Meyghani, Mokhtar Awang
Summary: This study investigated the influence of tool tilt angle on the thermomechanical behavior in friction stir welding (FSW) by employing specific considerations for mechanical boundary conditions in the Eulerian domain. Results showed that considering the tool tilt angle led to a more accurate temperature profile prediction and improved material bonding, enhancing the quality of weld joints. The model computational time was acceptable, and using the Eulerian formulation resulted in achieving remarkable accuracy in the simulations.
Article
Engineering, Multidisciplinary
B. Meyghani, M. Awang, S. S. Emamian
Summary: In this paper, numerical simulation of inertia welding was conducted by modifying the Norton friction model and using a continuous remeshing technique. The results showed the temperature reaching a maximum value after 1.5 seconds before decreasing, with maximum deformation and stress also predicted accurately during the process. Successful prediction of temperature distribution, thermal history, equivalent plastic deformation, axial shortening and stress distribution was achieved through the proposed methodology, showing high accuracy results compared to literature.
INTERNATIONAL JOURNAL OF ENGINEERING
(2021)
Proceedings Paper
Energy & Fuels
B. Meyghani, M. Awang, C. S. Wu
SYMPOSIUM ON ENERGY SYSTEMS 2019 (SES 2019)
(2020)
Proceedings Paper
Engineering, Manufacturing
Bahman Meyghani, Mokhtar Awang
ADVANCES IN MATERIAL SCIENCES AND ENGINEERING
(2020)
Article
Engineering, Multidisciplinary
B. Meyghani, M. B. Awang, C. S. Wu
INTERNATIONAL JOURNAL OF ENGINEERING
(2019)
Proceedings Paper
Engineering, Mechanical
S. Emamian, M. Awang, F. Yusof, Patthi Hussain, Bahman Meyghani, Adeel Zafar
ADVANCES IN JOINING TECHNOLOGY
(2019)
Proceedings Paper
Engineering, Mechanical
Bahman Meyghani, M. Awang, S. Emamian, Mohd Khalid B. Mohd Nor
ADVANCES IN JOINING TECHNOLOGY
(2019)
Proceedings Paper
Engineering, Industrial
M. S. Momeni, S. Ridha, S. J. Hosseini, B. Meyghani, S. S. Emamian
3RD INTERNATIONAL CONFERENCE ON MECHANICAL, MANUFACTURING AND PROCESS PLANT ENGINEERING (ICMMPE 2017)
(2018)
Article
Materials Science, Multidisciplinary
Bahman Meyghani, Mokhtar Awang, C. S. Wu
JOURNAL OF ADVANCED JOINING PROCESSES
(2020)