Guilherme Vieira Braga Lemos
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View article: Local and global mechanical properties of orbital friction stir welding on API X65 PSL2 steel / Inconel 625 clad pipes
Local and global mechanical properties of orbital friction stir welding on API X65 PSL2 steel / Inconel 625 clad pipes Open
Orbital friction stir welding (FSW) is a promising approach to joining clad pipes. In this work, the influence of individual process parameters on the material flow even as, mechanical properties in orbital friction stir welded clad pipes …
View article: Investigating microstructure, mechanical properties, and pitting corrosion resistance of UNS S32760 super duplex stainless steel after linear friction welding
Investigating microstructure, mechanical properties, and pitting corrosion resistance of UNS S32760 super duplex stainless steel after linear friction welding Open
High-performance alloys such as super duplex stainless steels (SDSS) are of interest to the oil and gas industry, especially in deep and ultra-deep reservoirs where high pressures and highly corrosive environments are prevalent. SDSS have …
View article: Microstructure and mechanical properties of SiMo ductile cast irons alloys with varied Mo and Nb contents
Microstructure and mechanical properties of SiMo ductile cast irons alloys with varied Mo and Nb contents Open
Four silicon and molybdenum (SiMo) ductile cast irons (DCI) alloys were produced with the intention of evaluating the possibility of substituting molybdenum (Mo) by niobium (Nb) for cost reduction purposes. These alloys were evaluated in t…
View article: Corrosion behavior of multi-layer friction surfaced structure from dissimilar aluminum alloys
Corrosion behavior of multi-layer friction surfaced structure from dissimilar aluminum alloys Open
Friction surfacing (FS) is a solid-state coating technology for metallic materials, where the deposition of a consumable material on a substrate is enabled via friction and plastic deformation. The deposited layer material commonly present…
View article: Friction taper stitch welding of a duplex stainless steel
Friction taper stitch welding of a duplex stainless steel Open
Friction taper stitch welding (FTSW) is a novel technique that uses multiple inserts to conceal surface crack in a given substrate. The inserts are rotated and forced to fill the crack as plasticized material, and forge with the substrate …
View article: Author Correction: Feasibility of orbital friction stir welding on clad pipes of API X65 steel and Inconel 625
Author Correction: Feasibility of orbital friction stir welding on clad pipes of API X65 steel and Inconel 625 Open
Correction to: Scientific Reports, published online 1 July 2023 The Funding section in the original version of this Article was incomplete. It now reads: “Open Access funding enabled and organized by Projekt DEAL. This publication was fund…
View article: Effects of surface hardeners on the performance of concrete floors prepared with different mixture proportions
Effects of surface hardeners on the performance of concrete floors prepared with different mixture proportions Open
Constant growth in the concrete floor sector claims new techniques to improve concrete performance and avoid undesirable issues. In this way, materials used in concrete floors are essential, and it is critical to investigate them. Therefor…
View article: Feasibility of Orbital Friction Stir Welding on Clad Pipes of Api X65 Psl 2 Steel and Inconel 625
Feasibility of Orbital Friction Stir Welding on Clad Pipes of Api X65 Psl 2 Steel and Inconel 625 Open
In this work, orbital friction stir welding (Orbital FSW) has been now developed in clad pipes, which is certainly of interest to the oil and gas industry. In this context, a system capable of performing sound joints in one pass with full …
View article: Friction Stir Lap Welding of Inconel 625 and a High Strength Steel
Friction Stir Lap Welding of Inconel 625 and a High Strength Steel Open
The joining of dissimilar hard metals such as high-strength steel and nickel-based alloy is required for shipbuilding and offshore applications to enhance the strength, fracture toughness, and corrosion resistance of the exposed parts. How…
View article: Effects of surface hardeners on the performance of concrete floors prepared with different mixture proportions
Effects of surface hardeners on the performance of concrete floors prepared with different mixture proportions Open
Constant growth in the concrete floor sector claims new techniques to improve concrete performance and avoid undesirable issues. In this way, materials used in concrete floors are essential, and it is critical to investigate them. Therefor…
View article: Artificial Neural Networks for Producing a Low-Cost Austempered Ductile Iron
Artificial Neural Networks for Producing a Low-Cost Austempered Ductile Iron Open
Two artificial neural networks (ANNs) were developed for producing an austempered ductile iron (ADI) with low-cost chemical composition and mechanical properties as per ASTMA897/897M-16-grade-1050/750/07 standard. Thus, the first ANN predi…
View article: Friction Stir Welding: Mitigating the Susceptibility to Intergranular Corrosion of Alloy 625
Friction Stir Welding: Mitigating the Susceptibility to Intergranular Corrosion of Alloy 625 Open
In this work, friction stir welding (FSW) was employed to alloy 625 grade I (soft annealed) sheets. Therefore, solid-state based welding was undertaken with a tool rotational speed of 200 rpm and welding speed of 1 mm/s. Microstructural fe…
View article: Probing underlying mechanisms for PCBN tool decay during friction stir welding of nickel-based alloys
Probing underlying mechanisms for PCBN tool decay during friction stir welding of nickel-based alloys Open
Friction stir welding (FSW) of nickel-based alloys can provide joints with improved corrosion resistance and mechanical properties that are deteriorated significantly during fusion welding of these alloys. However, rapid wear and poor long…
View article: High-temperature mechanical properties of cast Al–Si–Cu–Mg alloy by combined additions of cerium and zirconium
High-temperature mechanical properties of cast Al–Si–Cu–Mg alloy by combined additions of cerium and zirconium Open
The main aim of this work is to investigate the effects of combinative Ce and Zr additions (0.3 wt% Ce + 0.16 wt% Zr; 0.3 wt% Ce + 0.27 wt% Zr and 0.3 wt% Ce + 0.36 wt% Zr) on the microstructure and mechanical properties in cast Al–Si–Cu–M…
View article: Towards Qualification of Friction Stir Welding to AA5083-O and AA5052-O Aluminum Alloys
Towards Qualification of Friction Stir Welding to AA5083-O and AA5052-O Aluminum Alloys Open
Friction Stir Welding (FSW) is an excellent alternative for joining dissimilar and similar materials in comparison to conventional welding processes. In this sense, this work aims at qualifying FSW to similar AA5083-O and AA5052-O aluminum…
View article: Toughness properties of a friction hydro pillar processed offshore mooring chain steel
Toughness properties of a friction hydro pillar processed offshore mooring chain steel Open
In the past few years, solid-state welding has been a great alternative in comparison to the conventional fusion welding technologies. Solid-state welds are usually processed in lower temperatures than the other common fusion joints, tendi…
View article: PRELIMINARY STUDY ON EFFECT OF ROD GEOMETRY IN FHPP BETWEEN FE55006 NODULAR CAST IRON AND SAE 8620 STELL
PRELIMINARY STUDY ON EFFECT OF ROD GEOMETRY IN FHPP BETWEEN FE55006 NODULAR CAST IRON AND SAE 8620 STELL Open
Nodular cast irons are an excellent alternative in manufacturing process of axels due to their characteristics and good mechanical properties. However, the necessity of joining the axels to the gears and other components, made in carbon st…
View article: Towards Qualification of Friction Stir Welding to AA5083-O and AA5052-O Aluminum Alloys
Towards Qualification of Friction Stir Welding to AA5083-O and AA5052-O Aluminum Alloys Open
Friction Stir Welding (FSW) is an excellent alternative for joining dissimilar and similar materials in comparison to conventional welding processes. In this sense, this work aims at qualifying FSW to similar AA5083-O and AA5052-O aluminum…
View article: METHODOLOGY FOR DETERMINATION OF DEGREE OF NODULARITY IN A DUCTILE CAST IRON GGG 40 BY ULTRASONIC VELOCITY TEST
METHODOLOGY FOR DETERMINATION OF DEGREE OF NODULARITY IN A DUCTILE CAST IRON GGG 40 BY ULTRASONIC VELOCITY TEST Open
Cast iron alloys combine many elements such as carbon, iron, silicon, magnesium and can be usually classified according to their microstructure in ductile, gray, compacted, white, and malleable. Each one has particularities in terms of pro…
View article: Effect of welding speed on friction stir welds of GL E36 shipbuilding steel
Effect of welding speed on friction stir welds of GL E36 shipbuilding steel Open
The aim of this study was to characterize mechanical and microstructural characteristics of friction-stir-welded GL E36 shipbuilding steel. The tool rotational speed was kept constant at 500 rpm and different welding speeds were used (1, 2…
View article: Residual stress evaluation in API 5L X65 girth welded pipes joined by friction welding and gas tungsten arc welding
Residual stress evaluation in API 5L X65 girth welded pipes joined by friction welding and gas tungsten arc welding Open
The present study compared the residual stress states in friction welded pipes of API 5L X65 to those achieved by gas tungsten arc welding (GTAW). X-ray diffraction (XRD) was used to assess residual stresses. In addition, microstructural a…
View article: Methodology for Determination of Degree of Nodularity in a Ductile Cast Iron GGG 40 by Ultrasonic Velocity Test
Methodology for Determination of Degree of Nodularity in a Ductile Cast Iron GGG 40 by Ultrasonic Velocity Test Open
Cast iron alloys combine many elements such as carbon, iron, silicon, magnesium and can be usually classified according to their microstructure in ductile, gray, compacted, white, and malleable. Each one has particularities in terms of pro…
View article: Replacement of Gas Metal Arc Welding by Friction Welding for Joining Tubes in the Hydraulic Cylinders Industry
Replacement of Gas Metal Arc Welding by Friction Welding for Joining Tubes in the Hydraulic Cylinders Industry Open
Friction welding is a solid state technology which has been used worldwide. Potential advantages may be recognized as reducing welding project costs, weld weight, environmental impact and to promote enhanced mechanical properties. However,…
View article: SENSITIZATION STUDY IN FRICTION STIR WELDS OF INCONEL® 625
SENSITIZATION STUDY IN FRICTION STIR WELDS OF INCONEL® 625 Open
The new challenges of the oil and gas industry require noble materials with chemical stability and greater mechanical properties. Alloy 625, popularly known as Inconel® 625, is used as a cladding material for pipelines and other components…