Article
Engineering, Manufacturing
Niyati Raut, Vivek Yakkundi, Vivek Sunnapwar, Tanmoy Medhi, Vikram Kumar S. Jain
Summary: The light metal titanium alloys are widely used in industries where weight is a significant factor. Research in friction stir welding aims to produce strong joints without adding extra weight. This study investigates the welding of 10 mm thick titanium alloy plates using different rotational speeds and tool traverse speeds. The heat generated during welding affects the microstructure, resulting in a decrease in grain size and an increase in tensile strength in the stir zone.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Materials Science, Multidisciplinary
C. L. Jia, L. H. Wu, P. Xue, H. Zhang, D. R. Ni, B. L. Xiao, Z. Y. Ma
Summary: The study achieved static spheroidization of fine lamellar structures in the nugget of a friction stir welded Ti-6Al-4V joint. A new mechanism named termination coalescence was discovered, where adjacent lamellae gradually coalesce. The study also discusses the slower coarsening rate in lamellar structures compared to equiaxed structures due to a Burgers orientation relationship.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
C. L. Jia, L. H. Wu, P. Xue, D. R. Ni, B. L. Xiao, Z. Y. Ma
Summary: Structural integration is a critical developing direction in the aerospace field. A combination process of friction stir welding, static annealing, and superplastic deformation was proposed to eliminate strain localization during the fabrication of large-scale complex components. The study showed that a fully fine lamellar structure obtained through friction stir welding and the annealing process allowed for uniform superplastic deformation in the entire joint. The microstructures in the base material and the nugget zone tended to become similar equiaxed structures after deformation.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Gyeong-Woo Kim, Kuk-Hyun Song, Se-Min Jeong
Summary: The relationship between microstructure and mechanical properties of Ti-6Al-4V alloy subjected to friction welding was investigated. The results showed that the microstructures in the weld zone were developed by a combination of continuous dynamic recrystallization and phase transformation. Decreasing the upset length led to accelerated grain refinement and an increase in microhardness value. The yield and tensile strengths of the welded materials were maintained at the same levels as those of the base material. Friction welding can therefore produce Ti-6Al-4V alloy joints with superior performance based on the developed microstructure and mechanical properties.
MATERIALS TRANSACTIONS
(2022)
Article
Automation & Control Systems
Peter Madindwa Mashinini, Isaac Dinaharan, Danie Gerhardus Hattingh, Jebaraj David Raja Selvam
Summary: Ti-6Al-4V sheets were successfully joined using friction stir welding, resulting in defect-free joints. The stir zone experienced phase transformation and exhibited a unique microstructure. All specimens failed at the weld zone in fatigue tests, and increasing the welding speed decreased the fatigue strength.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Jae-Deuk Kim, Siva Prasad Murugan, Jae Won Kim, Chang-Keun Chun, Sung Wook Kim, Jae-Keun Hong, Seong-Woo Choi, Changwook Ji, Ji-Ung Kim, Yeong-Do Park
Summary: This study investigates the microstructure development in the stir zone of fine-grained Ti-6Al-4V alloy during friction stir welding, characterizing the microstructure, misorientation distribution, and crystallography of the base metal and stir zone using electron backscatter diffraction technique. The different layers of stir zone were found to consist of various microstructures, with a combination of heating/cooling induced alpha/beta phase transformations and plastic deformation induced continuous dynamic recrystallization responsible for the microstructural developments. The dominant mechanism of continuous dynamic recrystallization in the stir zone of fine-grained Ti-6Al-4V during FSW was homogeneous misorientation increase in low angle boundaries.
MATERIALS CHARACTERIZATION
(2021)
Article
Metallurgy & Metallurgical Engineering
Sergey Prikhodko, Dmytro G. Savvakin, Pavlo E. Markovsky, Olexander O. Stasuk, James Penney, Norbert Enzinger, Michael Gaskill, Frank Deley
Summary: Titanium alloys are considered supreme structural materials due to their high specific strength, but their wide use is limited by high cost. Layered structures and friction welding are effective ways to improve material utilization and achieve desirable results in complex structures.
WELDING IN THE WORLD
(2021)
Article
Materials Science, Multidisciplinary
Francisco Dias, Goncalo Cipriano, Armenio N. Correia, Daniel F. O. Braga, Pedro Moreira, Virginia Infante
Summary: Combining dissimilar materials is important in developing lightweight structures and reducing CO2 emissions in the transport sector. The use of advanced joining processes, like friction stir welding, can overcome the challenges of joining different materials in multi-purpose structures. This study investigates the mechanical performance and process parameters of dissimilar joints produced using a different approach to friction stir welding.
Article
Engineering, Civil
Mohammed Asmael, Tauqir Nasir, Qasim Zeeshan, Babak Safaei, Omer Kalaf, Amir Motallebzadeh, Ghulam Hussain
Summary: This study reviewed experimental works on friction stir spot welding of dissimilar alloys and applied machine learning algorithms to forecast tensile shear strength. The results showed that welding parameters had significant influences on the mechanical and microstructural characteristics of weld joints, with dwell period having a significant impact on the tensile shear strength.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2022)
Article
Nanoscience & Nanotechnology
Jeong-Won Choi, Yasuhiro Aoki, Kohsaku Ushioda, Hidetoshi Fujii
Summary: The interfacial temperature, microstructure, and hardness distribution of linear friction welded Ti-6Al-4V joints at different applied pressures were studied. Increasing pressure considerably decreased welding temperature and formed dynamically recrystallized ultra-fined alpha equiaxed grains in the weld center, leading to higher hardness and improved mechanical properties of the joints.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Alexander Kalinenko, Pavel Dolzhenko, Sergey Malopheyev, Diana Yuzbekova, Yuliya Borisova, Ivan Shishov, Vasiliy Mishin, Sergey Mironov, Rustam Kaibyshev
Summary: The interfacial microstructure produced during dissimilar friction stir lap welding of 6013 aluminum alloy and Ti-6Al-4V was investigated in this study. Finite element modeling was used to evaluate the temperature field within the weld zone, revealing a sharp temperature gradient across the dissimilar interface. The limitation on diffusion penetration of aluminum on the titanium side resulted in a relatively thin and discontinuous intermetallic compound.
Article
Engineering, Manufacturing
Priyanshi Agrawal, Ravi Sankar Haridas, Surekha Yadav, Saket Thapliyal, Supreeth Gaddam, Ravi Verma, Rajiv S. Mishra
Summary: Additive friction stir deposition (AFSD) is a novel thermo-mechanical solid state additive manufacturing process that enables the production of high-performance components from recycled metals, reducing energy consumption and environmental waste.
ADDITIVE MANUFACTURING
(2021)
Article
Chemistry, Multidisciplinary
Tauqir Nasir, Omer Kalaf, Mohammed Asmael, Qasim Zeeshan, Babak Safaei, Ghulam Hussain, Amir Motallebzadeh
Summary: This study investigated the welding of AA7075-T651 and Ti-6Al-4V alloys with additional carbon fiber-reinforced polymer using friction stir spot welding. The results showed the significant effects of welding parameters and the presence of Ti3Al and Ti-Al-C intermetallic compounds on the mechanical and microstructural properties of the weld joint. The study also found that dwell time plays an important role in determining the tensile shear load of the weld joint.
NANOTECHNOLOGY REVIEWS
(2021)
Article
Materials Science, Multidisciplinary
R. Ramesh Kumar, J. M. Babu, Bahaa Saleh, A. Chandrashekar, Kuldeep K. Saxena, A. Deepak, Abdul Razak, Abdulrajak Buradi, Abiot Ketema
Summary: This paper focuses on evaluating the bonding strength interfaces between contact materials using friction welding. Experimental tests and response surface methodology are used to determine the optimal friction parameters. The results show a close agreement between experimental values and the outcomes predicted by the response surface methodology.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Materials Science, Multidisciplinary
Feng Jin, Haodong Rao, Qian Wang, Guodong Wen, Pu Liu, Jiatao Liu, Junjun Shen, Jinglong Li, Jiangtao Xiong, Ninshu Ma
Summary: This study focused on the non-uniform radial microstructure and properties induced by heat-pattern in rotary friction welded Ti-6Al-4V joint, and clarified the formation mechanism by beta-reconstruction. The heat-pattern of Ti-6Al-4V friction welded at different rotational speeds can be generally separated into 'glass-like' and 'scissor-like'. The results showed that the radial microstructure of 'glass-like' and 'scissor-like' heat-patterns exhibited deformations of alpha grains and lamellar alpha' laths, corresponding to different regions. The strength and elongation of the joint decreased gradually from center to periphery due to the differences in microstructure.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Gnofam Jacques Tchein, Dimitri Jacquin, Egoitz Aldanondo, Dominique Coupard, Esther Gutierrez-Orrantia, Franck Girot Mata, Eric Lacoste
MATERIALS & DESIGN
(2019)
Article
Engineering, Manufacturing
Unai Alonso, Madalina Calamaz, Franck Girot, Edurne Iriondo
JOURNAL OF MANUFACTURING PROCESSES
(2019)
Article
Engineering, Mechanical
Ana P. Valerga Puerta, S. R. Fernandez-Vidal, Moises Batista, F. Girot
RAPID PROTOTYPING JOURNAL
(2020)
Article
Polymer Science
A. P. Valerga, S. R. Fernandez-Vidal, F. Girot, A. J. Gamez
Review
Materials Science, Multidisciplinary
Trunal Bhujangrao, Catherine Froustey, Edurne Iriondo, Fernando Veiga, Philippe Darnis, Franck Girot Mata
Article
Crystallography
Trunal Bhujangrao, Fernando Veiga, Alfredo Suarez, Edurne Iriondo, Franck Girot Mata
Article
Thermodynamics
Raffaele Russo, Samuel Forest, Franck Andres Girot Mata
Summary: In this manuscript, the application of the Cosserat medium in the simulation of metal manufacturing processes is studied. By providing a thermodynamically-consistent description of the Cosserat medium and calibrating the additional characteristic lengths using the TANH stress flow rule, the issues of mesh sensitivity and size-effects in manufacturing process simulation are successfully addressed.
CONTINUUM MECHANICS AND THERMODYNAMICS
(2023)
Article
Engineering, Civil
Trunal Bhujangrao, Fernando Veiga, Catherine Froustey, Sandra Guerard, Edurne Iriondo, Philippe Darnis, Franck Girot Mata
Summary: This study investigates the shear deformation characteristics of the AA7075 aluminum alloy under high strain conditions. Finite Element simulation is used to choose the appropriate specimen geometry, and experimental tests are conducted to observe the softening mechanism and uniformity of shear deformation.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2021)
Article
Engineering, Manufacturing
Raffaele Russo, Vikram Phalke, Didier Croizet, Mustapha Ziane, Samuel Forest, Frank Andres Girot Mata, Hyung-Jun Chang, Arjen Roos
Summary: Good quality manufacturing operation simulations are crucial for reliable numerical predictions. The localization of deformation may cause spurious mesh dependency, which can be regularized by using non-local continuum mechanics theories. This paper presents an original model formulation and implementation procedure for micromorphic continuum in an explicit finite element code, and verifies its correctness through validation and prediction.
INTERNATIONAL JOURNAL OF MATERIAL FORMING
(2022)
Article
Materials Science, Multidisciplinary
Ane Jimenez, Jon Mikel Sanchez, Franck Girot, Mario Renderos, Pedro Egizabal
Summary: This article investigates the influence of nanometric ceramic particles on the heterogeneous solidification regime of AlSi10MnMg alloy and proposes a mathematical model to predict the solidification behavior of nano-reinforced alloys. The experimental results suggest that cubic and pyramidal particles work better as nucleating particles in the studied alloy.
Article
Chemistry, Physical
Xabier Cearsolo, Mario Arrue, Maitane Gabilondo, Jon Mikel Sanchez, Haize Galarraga, Maider Garcia de Cortazar, Franck Girot Mata
Summary: Metal additive manufacturing technologies have attracted significant interest. To adapt to additive manufacturing processes, the chemical composition of existing metallic alloys needs to be adjusted or new alloys need to be developed. This paper presents a methodology using thermodynamic heat transfer equations, simulation, and powderless tests to determine optimal conditions for laser melting deposition processes. By reducing the number of experimental tests with powder, this methodology simplifies the development of new alloys and enables the production of crack-free single tracks.
Article
Multidisciplinary Sciences
Jon Mikel Sanchez, Maribel Arribas, Haize Galarraga, Maider Garcia de Cortazar, Marco Ellero, Franck Girot
Summary: The use of secondary aluminum alloys is limited by the high Fe contents in recycled alloys. The detrimental effects of iron on the performance of secondary Al-Si alloys were studied, and it was found that at least 1.2 wt% of Mn can avoid the formation of the detrimental 0-Fe phase. Furthermore, gravitational sedimentation experiments showed a high Fe removal efficiency of up to 64% and 61% after a holding time of 30 min at 600 degrees C and 670 degrees C, respectively.
Article
Polymer Science
Ana P. Valerga, Severo R. Fernandez-Vidal, Franck Girot
Summary: Material extrusion (MEX), also known as fused deposition modelling (FDM/FFF), is widely used in polymeric Additive Manufacturing (AM). This study investigates the effects of ageing on the tensile properties of PLA samples, showing that ultimate strength decreases with ageing and chemical pre-treatment can improve surface quality.
Article
Mechanics
Imanol Garcia-Beristain, Michelle Figueroa-Landeta, J. Esteban Lopez-Aguilar, Maider Garcia de Cortazar, Franck Girot, Marco Ellero
Summary: This research uses the BMP model to examine flow patterns of semi-solid aluminium alloys in open-rotor and stator-rotor mixers. The study reveals the distinct thixo-viscoelastic behavior of the alloys and how it affects the flow characteristics. The findings provide valuable insights for the industrial design and optimization of molten Al-alloy processing.
JOURNAL OF NON-NEWTONIAN FLUID MECHANICS
(2023)
Review
Engineering, Manufacturing
Raffaele Russo, Franck Andres Girot Mata, Samuel Forest, Dimitri Jacquin
JOURNAL OF MANUFACTURING AND MATERIALS PROCESSING
(2020)