scholarly journals Dissimilar Rotary Friction Welding of Inconel 718 to F22 Using Inconel 625 Interlayer

2021 ◽  
Vol 11 (22) ◽  
pp. 10684
Author(s):  
Ateekh Ur Rehman ◽  
Nagumothu Kishore Babu ◽  
Mahesh Kumar Talari ◽  
Saqib Anwar ◽  
Yusuf Usmani ◽  
...  
Keyword(s):  
Inconel 718 ◽  
Carbon Diffusion ◽  
Weld Interface ◽  
Inconel 625 ◽  
Base Metals ◽  
Melting Points ◽  
Rotary Friction Welding ◽  
Dissimilar Metal Joining ◽  
Welding Defect ◽  
Rotatory Motion

Dissimilar metal joining has always been a challenging task because of the metallurgical incompatibility and difference in melting points of alloys being joined. Diffusion and mixing of alloying elements from dissimilar base metals at the weld often cause unwanted metallurgical changes resulting in unsuccessful welds or underperformance of the weldment. Solid-state dissimilar friction welds of Inconel 718 and F22 were prepared in this study with an Inconel 625 interlayer to address the carbon enrichment of Inconel 718 during the welding. Defect-free rotary friction welds were produced in this study. Microstructural and mechanical properties investigation of the weldments and base metals was carried out, and results were analysed. Intermixing zone was observed at the weld interface due to the softening of the metal at the interface and rotatory motion during the welding. The high temperatures and the plastic deformation of the intermixing zone and thermo-mechanically affected zone (TMAZ) resulted in the grain refinement of the weld region. The highest hardness was observed at the Inconel 718/F22 weld interface due to the plastic strain and the carbon diffusion. The tensile specimens failed in the F22 base metal for the weld prepared with and without the Inconel 625 interlayer. Inconel 718/F22 welds exhibited lower toughness values compared to the Inconel 718/F22 welds prepared with Inconel 625 interlayer.

scholarly journals Rotary Friction Welding of Inconel 718 to Inconel 600

Metals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 244
Author(s):  
Ateekh Ur Rehman ◽  
Yusuf Usmani ◽  
Ali M. Al-Samhan ◽  
Saqib Anwar
Keyword(s):  
High Temperature ◽  
Friction Welding ◽  
Inconel 718 ◽  
Weld Interface ◽  
Significant Loss ◽  
Dissimilar Welding ◽  
High Temperature Strength ◽  
Electron Microscopic ◽  
Inconel 600 ◽  
Rotary Friction Welding

Nickel-based superalloys exhibit excellent high temperature strength, high temperature corrosion and oxidation resistance and creep resistance. They are widely used in high temperature applications in aerospace, power and petrochemical industries. The need for economical and efficient usage of materials often necessitates the joining of dissimilar metals. In this study, dissimilar welding between two different nickel-based superalloys, Inconel 718 and Inconel 600, was attempted using rotary friction welding. Sound metallurgical joints were produced without any unwanted Laves or delta phases at the weld region, which invariably appear in fusion welds. The weld thermal cycle was found to result in significant grain coarsening in the heat effected zone (HAZ) on either side of the dissimilar weld interface due to the prevailing thermal cycles during the welding. However, fine equiaxed grains were observed at the weld interface due to dynamic recrystallization caused by severe plastic deformation at high temperatures. In room temperature tensile tests, the joints were found to fail in the HAZ of Inconel 718 exhibiting good ultimate tensile strength (759 MPa) without a significant loss of tensile ductility (21%). A scanning electron microscopic examination of the fracture surfaces revealed fine dimpled rupture features, suggesting a fracture in a ductile mode.

scholarly journals Comparative research on selected machinability indicators of nickel alloy milling – INCONEL 625 and INCONEL 718

Mechanik ◽  
2015 ◽  
pp. 724/293-724/301
Author(s):  
Stanisław Bławucki ◽  
Jakub Matuszak ◽  
Kazimierz Zaleski
Keyword(s):  
Nickel Alloy ◽  
Inconel 718 ◽  
Comparative Research ◽  
Inconel 625

Cellular automata modeling for rotary friction welding of Inconel 718

2021 ◽  
pp. 1-9
Author(s):  
Luis A. Reyes ◽  
Carlos Garza ◽  
Miguel Delgado ◽  
Lizangela Guerra-Fuentes ◽  
Luis López ◽  
...  
Keyword(s):  
Cellular Automata ◽  
Friction Welding ◽  
Inconel 718 ◽  
Rotary Friction Welding

Optimization of machining characteristics for EDM of different nickel-based alloys by embodying of fuzzy, grey relational and Taguchi technique

2020 ◽  
Vol 18 (1) ◽  
pp. 23-36
Author(s):  
Sahil Sharma ◽  
Umesh Kumar Vates ◽  
Amit Bansal
Keyword(s):  
Inconel 718 ◽  
Machining Process ◽  
Simultaneous Optimization ◽  
Inconel 625 ◽  
Electrode Wear ◽  
Peak Current ◽  
Content Type ◽  
Grey Relational ◽  
Pulse On Time ◽  
Machining Characteristics

Purpose In the current exploration, the machinability of three different nickel-based super-alloy materials (Inconel 625, Inconel 718 and Nimonic 90) was experimentally investigated by using a die-sinking electrical discharge machining (EDM). The effect of changing important input process parameters such as pulse on time (Ton), off time (Toff), peak current (Ip) and tool rotation (TR) was investigated to get optimum machining characteristics such as material removal rate, roughness, electrode wear rate and overcut. Design/methodology/approach Experimentation has been performed by using Taguchi L9 orthogonal design. An integrated route of fuzzy and grey relational analysis approach with Taguchi’s philosophy has been intended for the simultaneous optimization of machining output parameters. Findings The most approbatory factors for machining setting have been attained as: (Ton = 100 µs, Toff = 25 µs, Ip = 14 A, TR = 725 rpm) for machining of Inconel 625 and Inconel 718; and (Ton = 100 µs, Toff = 75 µs, Ip = 14 A, TR = 925 rpm) for machining of the Nimonic 90 material. Peak current has been observed as an overall influencing factor to achieve better machining process. Microstructural study through SEM has also been carried out to figure out the surface morphology for the EDMed Ni-based super alloys. Originality/value The proposed machining variables and methodology has never been presented for Nimonic 90 alloy on die-sinking EDM.

Finite Element Analysis of Hybrid Rotary Friction Welding and Investigating the Effects of Pressure on Variations of Temperature and Strain Values

2008 ◽  
Vol 580-582 ◽  
pp. 287-290
Author(s):  
Mohammad Habibi-Parsa ◽  
H. Davari ◽  
A.M. Hadian ◽  
Mahmoud Nili-Ahmadabadi
Keyword(s):  
Finite Element ◽  
Friction Welding ◽  
Weld Interface ◽  
Optimum Process ◽  
Element Analysis ◽  
Optimum Process Parameter ◽  
Finite Element Program ◽  
Rotary Friction Welding ◽  
Welding Processes

Hybrid Rotary Friction Welding is a modified type of common rotary friction welding processes. In this welding method, parameters such as pressure, angular velocity and time of welding control temperature, stress, strain and their variations which play an important rule in defining optimum process parameter combinations in order to improve the design and manufacturing of welding machines and quality of welded parts. Thermo-mechanical simulation of friction welding has been carried out. It has been shown that simulation is an important tool for prediction of generated heat and strain at the weld interface and can be used for prediction of microstructure and evaluation of quality of welds. For simulation of Hybrid Rotary Friction Welding a commercial finite element program has been used and the effects of pressure on temperature and strain variations have been investigated.

Research on Mechanical Properties of Thin Sheets Blanks Made of Creep-Resisting Nickel Superalloys

2013 ◽  
Vol 212 ◽  
pp. 259-262
Author(s):  
Monika Hyrcza-Michalska
Keyword(s):  
Mechanical Properties ◽  
Inconel 718 ◽  
Nickel Alloys ◽  
Thin Sheet ◽  
High Strength ◽  
Inconel 625 ◽  
Thin Sheets ◽  
Inconel 718 Alloy ◽  
Mechanical Working ◽  
Inconel Alloys

Mechanical working manufacturing methods of nickel alloys used conventionally strips and blanks need to solve many problems concerning high strength material forming which is characteristic limited plasticity. The production pressed elements of vehicle constructions and aircraft engine elements requires the high quality drawpieces since these are essential for safety. They are also the main structural components. Conventional methods of mechanical working such as pressing can be used in quantity production of the above mentioned elements and their production can also be cost-effective. Forming nickel alloys generates a lot of technological wastes resulting from back-springing effects determining the most appropriate pressure in the process of pressing. Failure holes in the process of bulging as well as cracking of drawpieces in the process of deep drawing. The heterogeneous mechanical properties distribution on thin sheet blanks made of Inconel alloy, which is different than material quality certificate shows, produces also a lot of manufacturing problems. These problems are usually solved by production engineers in the following way: dividing the production of ready drawpieces into a bigger number of simple blank profiling operations, shallow pressing, using a rubber punch for pressing or hydroforming. Complex drawpieces shapes are quite often made of several parts which are next welded. In the case of presented tube a tubular diffuser made of Inconel 718 alloy blank and cone made of Inconel 625. However the process of forming high strength materials like nickel alloys requires the application bigger forming forces than in the same kind of conventional formable steel processes. Tools get jammed quite often in the process and high force presses of 10 MN or more need to be used so is very expensive. The aspect of cold mechanical forming discussed materials has been a particular interest. The researches based on precise evaluation mechanical properties and technological plasticity of the selected materials in basic mechanical and technological tests as well as in FEM numerical simulation (finite elements method). The material models applied to simulation contain the pointed out experimentally the mechanical characteristics of Inconel alloys. The thin sheets blanks made of 0,9 mm thick Inconel 718 alloy and 0,45 mm thick Inconel 625 alloy blanks have been examined. The possibilities of using numerical simulations for solving the problems of selecting or modifying the pressing technology and hydroforming that type materials as well as forecasting the results of forming processes have been also presented. The evaluation of drawability of thin sheets blanks made of Inconel 718 and 625 alloys has also been discussed in the paper.

scholarly journals Microstructure Analysis of Hybrid Laser Powder Bed Fusion and TIG Welding of Ni-based Superalloys

2020 ◽  
Author(s):  
Omar Fergani ◽  
Katharina Eissing ◽  
Teresa Perez Prado ◽  
Ole Geisen
Keyword(s):  
Inconel 718 ◽  
Welding Process ◽  
Positive Outcome ◽  
Tig Welding ◽  
Inconel 625 ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Heat Treated ◽  
Weld Parameters

The industrial use of laser powder-bed fusion (L-PBF) in turbomachinery is gaining momentum renderingthe inspection and quali?cation of certain post-processing steps necessary. This includes fusiontechniques that allow to print multiple parts separately to take advantage of e.g. various print orientationsand join them subsequently. The main motivation of this study is to validate the tungsten inertgas (TIG) welding process of L-PBF manufactured parts using industrial speci?cations relevant for gasturbines to pave the way for the industrial production of modular build setups. For this, two commonlyused nickel-based super alloys for high-temperature applications, Inconel 718 and Inconel 625 are chosen.Since their defect-free printability has been established widely, we focus on the suitability to be joined usingTIG welding. The process is evaluated performing microstructural examination and mechanical testsin as-built as well as heat-treated samples. The welds are assessed by applying a general weld quali?cationapproach used at Siemens Gas and Power. It was found that both materials can be joined via TIGwelding using standard weld parameters causing minimal defects. A solution annealing heat treatmentbefore welding is not necessary for a positive outcome, but still recommended for Inconel 718.

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