Article
Materials Science, Multidisciplinary
Arjun Sood, Jim Schimmel, Vitoria M. Ferreira, Marko Bosman, Constantinos Goulas, Vera Popovich, Marcel J. M. Hermans
Summary: This study investigates the microstructure and mechanical properties of Invar 36 alloy deposited using cold wire GTAW process at different heat inputs. The results show that reducing the heat input can improve the ductility and mechanical properties of the alloy, while having a negligible effect on the coefficient of thermal expansion.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Fuyang Gao, Yongjie Cui, Yifan Lv, Wei Yu, Peng Jiang
Summary: In this paper, 12mm Ti6Al4V titanium was welded using keyhole gas tungsten arc welding technology, with microstructure and properties of the welded joint studied. The tensile strength of the joint reaches 925MPa, with good toughness demonstrated in the weld metal.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Adarsh Kumar, Nilesh Kumar, Mithlesh Kumar Mahto, Surya D. Yadav, Meghanshu Vashista, Mohd Zaheer Khan Yusufzai
Summary: The welding process of Ti-6Al-4V alloy was studied, and a shielding set-up was used to produce coarse β-phase grains and Widmanstaetten morphology in the heat affected zone and weld zone, which improved the resistance to grain boundary sliding and dislocation glide, resulting in enhanced creep resistance in these regions.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Yipeng Wang, Hong Li, Zhuoxin Li, Yu Zhang, Jian Qin, Guangyu Chen, Bojin Qi, Caiyou Zeng, Baoqiang Cong
Summary: This study proposed a novel double-pulsed variable polarity tungsten inert gas (DP-VPTIG) arc for achieving full penetration welds of 6 mm thick AA2219 aluminum alloy. Compared to the conventional VPTIG arc, the DP-VPTIG arc effectively refined the grain structure, improved the distribution of Cu solute element, and enhanced the microhardness and mechanical properties of the weld zone.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Multidisciplinary Sciences
Rosario Casanueva, Christian Branas, F. Javier Diaz, Francisco J. Azcondo, Diego Ferreno, Jesus Setien
Summary: This paper presents the characterization of a TIG welding process using an arc welding power supply based on resonant power converters and an FPGA-based control circuit. The performance of the proposed power supply was compared to a commercial welding machine, and the mechanical properties of the welded joints were examined. The results showed improved efficiency, power factor, and lower energy consumption with the proposed power supply, and the ductility of the welded plates using pulsed modes outperformed those using dc operation.
Article
Materials Science, Multidisciplinary
Chao Chen, Guorui Sun, Wenbo Du, Yue Li, Chenglei Fan, Huijing Zhang
Summary: This study achieved the same heat input by designing different combinations of welding parameters and analyzed the formation, microstructure, and mechanical properties of the weld bead. The results showed that under the same heat input, the welding current and voltage had a significant impact on the weld bead, affecting its penetration, width, spreadability, and hardness.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Dong Min Cho, Jin Sung Park, Seung Gab Hong, Sung Jin Kim
Summary: The corrosion behaviors of superduplex stainless steel welded tubes in an acidic brine environment were compared between tungsten inert gas (TIG) welding and laser beam (LB) welding. The as-welded LB-weld sample showed poor corrosion resistance due to larger bead size, higher oxide inclusion, and lower content compared to TIG-welds. However, post-weld heat treatment (PWHT) improved the corrosion resistance by restoring the phase balance and dissolving the deleterious inhomogeneities around the fusion line. The key metallurgical factor controlling the corrosion behavior of LB-welded steel tubes and the underlying corrosion mechanism were also identified.
Article
Materials Science, Multidisciplinary
Taraneh Reza Tabrizi, M. Sabzi, S. H. Mousavi Anijdan, A. R. Eivani, N. Park, H. R. Jafarian
Summary: This study investigated the effect of continuous and pulsed current in gas tungsten arc welding on the properties of AISI 316L stainless steel joints. The change in welding current mode was found to affect the grain morphology and size in the weld metal, thereby impacting the hardness and fracture toughness of the joints. The results showed that both joints experienced a completely ductile fracture and the welding current mode influenced the microstructure and mechanical properties of the joints.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
Zhuoxin Li, Yulin Zhang, Hong Li, Yipeng Wang, Lijuan Wang, Yu Zhang
Summary: This work investigated the liquation cracking susceptibility of aluminum alloy 7075-T651 joints welded using customized Al-Cu-Si and Al-Cu-Mg-Zn filler wire during gas tungsten arc welding. The results showed that the use of different filler metals resulted in varying liquation cracking susceptibility. Mechanical testing demonstrated that eliminating liquation cracks can reduce the data dispersion of the 7075 gas tungsten arc welding joint.
Article
Materials Science, Multidisciplinary
N. Sivakumar, B. Sanjay Gandhi, K. Senthil Kumar, B. Arulmurugan
Summary: This research investigates the microstructure, microsegregation, and mechanical behavior of Ni-based superalloy 59. It was found that welding with pulsed current gas tungsten arc welding (PCGTAW) resulted in refined grain structure, reduced heat-affected zone, and narrow weld bead compared to continuous current gas tungsten arc welding (CCGTAW). PCGTAW weldments also exhibited minimal microsegregation. Furthermore, PCGTAW weld joints demonstrated higher tensile strength, toughness, and hardness than CCGTAW weld joints.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Thermodynamics
Weifeng Xie, Chenglei Fan, Chunli Yang, Yu Liu
Summary: This study compares the weld deformation and residual stress distribution of dual phase steel thin plate joints welded using Gas Tungsten Arc (GTA) and Ultrasonic-wave-assisted Gas Tungsten Pulsed Arc (U-GTPA) welding. The results show that using U-GTPA welding can reduce weld deformation and achieve narrower longitudinal tensile stress range.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Kiyoaki T. Suzuki, Shun Omura, Shun Tokita, Yutaka S. Sato, Yujiro Tatsumi
Summary: In this study, an aluminum alloy sheet was successfully welded to a nickel-plated iron sheet using a silicon-containing aluminum filler by gas tungsten arc welding. The joint strength of the aluminum/iron interface was improved by the simultaneous addition of silicon and nickel, which resulted in a reduction in the intermetallic compound layer thickness and the refinement of its grains. The addition of silicon alone reduced the thickness of the intermetallic compound layer, while the addition of nickel further refined its grains. The combination of silicon and nickel showed the most effective improvement in joint strength.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Geon-Woo Park, Minha Park, Byung Jun Kim, Sunmi Shin, Hyoung Chan Kim, In-Wook Park, Sung Soo Park, Jong Bae Jeon
Summary: In this study, Fe-24.34Mn-3.53Cr-0.42C high manganese steel sheets were joined using gas-tungsten arc welding and plasma arc welding. The weld zone exhibited a Mn-depleted zone and the presence of epsilon-martensite. The mechanical properties of the weld zone were lower than the base metal, but heat treatment reduced the differences in mechanical properties.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
R. Soundararajan, K. R. Ramkumar, S. Sivasankaran, Hyoung Seop Kim
Summary: This study focuses on enhancing the tensile strength of AA 6061-T6 plates by using a HEA filler metal in gas tungsten arc welding. The results show the presence of HEA with Al peaks and the formation of FCC phases after welding. The retention of the HEA phase indicates thermal stability and sluggish diffusion behavior. The welded plates exhibit higher strength and plasticity due to the presence of nanocrystalline HEA and superior interfacial bonding between AA 6061-T6 and HEA elements.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
J. G. Lopes, Priyanka Agrawal, Jiajia Shen, N. Schell, Rajiv S. Mishra, J. P. Oliveira
Summary: In recent years, high entropy alloys (HEAs) have been explored as potential alternatives to traditional engineering alloys. Efforts have been made to improve their mechanical properties and discover new HEAs due to the multitude of compositions allowed by these materials. The processability of HEAs, particularly in welding, is an important topic that needs to be studied. This research examines the microstructure and mechanical behavior of defect-free joints in a Fe50Mn30Co10Cr10 HEA achieved through Gas Tungsten Arc Welding (GTAW). The resulting joints exhibit excellent mechanical performance, making them viable for real-life applications.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Review
Engineering, Mechanical
G. Ranjith Kumar, M. Sathishkumar, M. Vignesh, M. Manikandan, G. Rajyalakshmi, R. Ramanujam, N. Arivazhagan
Summary: Metal additive manufacturing (AM) has matured and gained wide applications in the aerospace industry. With the introduction of new processes, materials, and cost-efficiency, AM has become a more versatile, common, and safer manufacturing technology. This article focuses on the use of AM in the aerospace industry, discussing its advantages and challenges.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
(2023)
Article
Engineering, Manufacturing
Bibin Jose, M. Manikandan, N. Arivazhagan, Nageswara Rao Muktinutalapati, G. Madhusudhan Reddy
Summary: Eighteen percent Ni maraging steels are high performance alloys with ultra-high strength and good toughness. Welding of maraging steel faces the challenge of formation of reverted austenite (RA) phase in the fusion zone (FZ), which deteriorates the mechanical performance of welded joints. This study demonstrates that double-pulsed gas metal arc welding (DP-GMAW) combined with homogenizing + solutionizing + aging (HSA) treatment has the best mechanical properties, as it effectively prevents the formation of RA.
JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME
(2023)
Article
Engineering, Mechanical
V Sreenivasulu, P. Subramani, V Jayakumar, K. Mageshkumar, N. Arivazhagan, M. Manikandan, Szymon Tofil, M. Sathishkumar
Summary: The high-velocity oxy-fuel coating technique is widely used in various industries due to its superior quality, cost-effectiveness, flexibility, and convenience for use. This research focuses on the high-temperature corrosion characteristics of high-velocity oxy-fuel coated NiCrMoNb and Cr3C2-25NiCr powder on X8CrNiMoVNb16-13 alloy. The study evaluates the oxidation and hot corrosion characteristics of the alloy in air and molten salt conditions and analyzes the coating's Vickers hardness, thickness, porosity, and microstructure. The research also assesses the metallurgical integrity of the corrosion product using scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD) analysis. The findings suggest that the Cr3C2-25NiCr coating is suitable for the molten salt condition, while the NiCrMoNb coating is recommended for air oxidation application.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
(2023)
Article
Chemistry, Physical
M. Natesh, Senthil Kumaran Selvaraj, N. Arivazhagan, M. Manikandan, Szymon Tofil, Norbert Radek, Yash Mistry, Muthu Sm
Summary: This study investigates the micro-segregation of elements in Incoloy 20 and explores the possibility of reducing it through argon arc welding with Ni and Mo-rich filler wire. Crack-free welds with different structures are achieved using continuous current argon arc welding (CCAAW) and pulsed current argon arc welding (PCAAW). Results show that PCAAW effectively suppresses elemental segregation, enhances toughness and hardness, and leads to higher tensile strength and smaller grain sizes compared to CCAAW.
Article
Materials Science, Multidisciplinary
M. Prem Kumar, M. Manikandan
Summary: This research focuses on selecting phase change materials (PCM) and container materials for future concentrated solar power plants (CSP). The study examines the hot corrosion behavior of Inconel 617 and 625 in a Na2SO4 + 45 wt-% diatomite PCM environment at 800 degrees C for different durations. The results show that dense Cr2O3 oxide scales are formed on both alloys, providing better oxidation resistance. In addition, Inconel 625 exhibits lower weight gain compared to Inconel 617 due to the higher wt-% of Cr in the alloy and the formation of Nb oxides, which reduce the diffusion rate of corrosion species.
CORROSION ENGINEERING SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Renangi Sandeep, N. Arivazhagan
Summary: In this study, AA7475 and PPS polymer were welded using the FLW process. An empirical model was developed to predict the tensile lap shear strength based on FLW parameters. The bonding mechanisms of different pin profiles were evaluated, and the optimum welding parameters for maximum shear strength were determined.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Composites
S. J. Adarsh, Arivazhagan Natarajan
Summary: Lightweight hybrid structures are developing due to increased demand for fuel economy and lower emissions in the automotive and aerospace industries. This study aims to analyze and optimize the influence of friction stir welding (FSW) process parameters on the tensile shear strength of the aluminum-polyamide hybrid joint. The study findings help define the bonding mechanism and optimize the FSW parameters for maximum joint tensile shear strength.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2023)
Article
Engineering, Mechanical
M. Venkateshkannan, N. Arivazhagan, M. Nageswara Rao, G. Madhusudhan Reddy
Summary: This research investigates the weld joints generated in naval grade high-strength low-alloy steel using continuous wave GMAW and double pulse GMAW. The study found that the double pulse GMAW joint exhibited higher impact toughness and a better microstructure in the fusion zone.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
(2023)
Article
Engineering, Mechanical
M. Prem Kumar, M. Manikandan
Summary: The global focus on climate change has shifted towards the use of renewable energy. Concentrated solar power (CSP) plants are receiving more attention in research. The major issue with CSP plants is the hot corrosion of container materials exposed to phase change material (PCM). This study investigates the corrosion resistance of Inconel 617 and Inconel 625 in a PCM environment, and the results show that Inconel 625 performs better at 900 degrees C.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2023)
Article
Engineering, Chemical
Bala Murali Nagarajan, Manikandan Manoharan
Summary: This research attempted to fabricate hybrid joints between aluminum alloy 5052-H32 and polycarbonate using friction stir spot welding. Response surface methodology was used to optimize process parameters, and the influence of laser-based presurface treatment on joint performance was compared. Mechanical and metallurgical findings showed effective bonding between these dissimilar materials, with chemical adhesion identified as the bonding mechanism. The maximum tensile shear value obtained was 19.02 MPa with optimized friction stir spot welding parameters, while the maximum joint strength of 23.37 MPa was achieved with laser-based presurface treatment.
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Renangi Sandeep, Bala Murali Nagarajan, M. Prem Kumar, Bibin Jose, Manikandan Manoharan, Arivazhagan Natarajan
Summary: This study investigated the effects of air and underwater welding environments on the friction stir lap welding (FSLW) of AA7475 and Polyphenylene-sulfide (PPS) polymer dissimilar materials. The optimum FSLW process parameters were determined using response surface methodology-based desirability function approach in an underwater environment. The joint characteristics, including microstructure, mechanical properties, and physicochemical changes in the polymer, were compared between air and underwater FSLW. The findings revealed that the welding environment significantly influenced the formation of air voids, tensile characteristics, and loss of crystallinity in polymers.
Article
Engineering, Mechanical
Szymon Tofil, Piotr Kurp, Manoharan Manikandan
Summary: This article presents a method of increasing the shear strength of adhesive joints of plastics through laser texturing. By applying different geometric patterns of laser texturing on the surface, the method improves the strength of the bonded joint after microscopic examination and destructive tests.
