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.

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

The Research and Application Status of Inconel 600 Alloy under Extremely Situation

2017 ◽  
Vol 730 ◽  
pp. 21-27 ◽  
Author(s):  
Heng Zhao ◽  
Qing Bin Liu ◽  
Da Wei Yao
Keyword(s):  
High Temperature ◽  
Surface Treatment ◽  
High Energy ◽  
Chemical Oxidation ◽  
High Temperature Strength ◽  
Hydrogen Effect ◽  
Temperature Oxidation ◽  
Energy Beam ◽  
Inconel 600 ◽  
Inconel 600 Alloy

The Inconel 600 alloy relies on high temperature strength and aggressive environment resistance for main pipes and heat exchangers for power plant. Through high energy laser beam surface treatment, upgrade oxidation performance and design based accident prevention, the durable Inconel 600 alloy is realized. At the same time, the chemical diffusion and high energy beam welding are used for wearness enhancement and chemical oxidation. It is suggested that, the laser surface treatment and hydrogen effect are accurately selected for abrasive wear resistance and high temperature oxidation, repectively. As a result, the lifespan of Inconel 600 alloy increases, the pitting concentration and cracks formation are prevented effectively.

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.

scholarly journals Effect of faying surfaces and characterization of aluminium AA6063-steel AISI304L Dissimilar joints fabricated by friction welding with Hemispherical Bowl, and Threaded Faying Surfaces

2021 ◽  
Author(s):  
Senthil Murugan Subramanian ◽  
Sathiya Paulraj ◽  
Noorul Haq Abdul Haq
Keyword(s):  
Impact Toughness ◽  
Friction Welding ◽  
Weld Zone ◽  
Welding Process ◽  
Weld Interface ◽  
Dissimilar Joints ◽  
Dissimilar Weld ◽  
Weld Joints ◽  
Faying Surface ◽  
Rotary Friction Welding

Abstract This work describes the effect of newly introduced faying surfaces on the microstructure and the mechanical properties of dissimilar weld joints of AA6063 and AISI304L alloys that fabricated through the rotary friction welding process (RFW). The experiments were done as six different experimental methods (‘A’ to ‘F’) at 1300 rpm rotation, 18 MPa friction pressure (FP), 24 MPa upset pressure (UP) and 5 sec friction time (FT) with the faying surfaces of hemispherical bowl and thread of 1 mm pitch on the weld specimens. The fabricated joints and the weld zones were characterized by macro and micro-study, Energy Dispersive X-ray Spectroscopy (EDS) spectrums, tensile properties, Vickers microhardness, impact toughness and fractography. The results showed that these faying surface modifications strengthen the bonding between the weld specimens and influences the performance of the joints. The hemispherical bowl showed better results than the threaded surfaces. Axial shortenings were within the acceptable limit in the range of 20–27 mm. Macro and microstructural studies showed the defect-free weld joints and the strong bonding between AA6063 and AISI304L alloys. The hemispherical faying surface on AISI304L alloy formed a U-shaped weld interface (WI) in the dissimilar joints. EDS proved the formation of the Fe-Al intermetallic and the element ‘O’ at weld zone. The joint efficiency for all the methods was around ≥ 100%. Maximum tensile strength was recorded as 238 MPa for method ‘F’. The threaded surface showed good hardness property nearby WI and method ‘A’ yielded maximum impact toughness for the joint.

Microstructure Characterization of Superalloy 718 during Dissimilar Rotary Friction Welding

2019 ◽  
Vol 969 ◽  
pp. 211-217 ◽  
Author(s):  
Muralimohan Cheepu ◽  
D. Venkateswarlu ◽  
P. Nageswara Rao ◽  
V. Muthupandi ◽  
K. Sivaprasad ◽  
...  
Keyword(s):  
Friction Welding ◽  
Weld Interface ◽  
Temperature Deformation ◽  
Interface Temperature ◽  
Alloy 718 ◽  
Electron Backscattered Diffraction ◽  
Microstructural Observation ◽  
Rotary Friction Welding ◽  
Super Alloy

In the present study, dissimilar friction welding between super alloy 718 and carbon steel friction welded to evaluate the formation of microstructure in the weld interface and in superalloy 718. The temperature during friction welding at weld interface was recorded to determine the temperature effect on the microstructural changes on alloy 718 side. The finite element modeling of weld interface temperature, deformation and stresses were evaluated and validated with the experimental results. The microstructural observation along with the weld interface and adjacent regions are studied. The effect of friction welding on superalloy weld interface and microstructural formation were investigated under electron backscattered diffraction analysis to evaluate the grain size measurements. The effect of thermomechanical action on the microstructure was evaluated by texture analysis.

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 DISCONTINUOUS DRILLING OF INCONEL 718

2021 ◽  
Vol 2021 (3) ◽  
pp. 4569-4575
Author(s):  
T. Wolf ◽  
◽  
I. Iovkov ◽  
D. Biermann ◽  
◽  
...  
Keyword(s):  
High Temperature ◽  
Process Design ◽  
Inconel 718 ◽  
Thermal Load ◽  
Machining Process ◽  
Experimental Investigations ◽  
High Temperature Strength ◽  
Drilling Process ◽  
Nickel Base ◽  
Process Strategy

Inconel 718 as one of the most common nickel-base alloys is mainly characterized by its high-temperature strength. Thus, in particular drilling is subject to high tool wear due to high thermomechanical loads on the cutting edges. To reduce those effects an alternative process design of discontinuous drilling was developed which contains a periodical interruption of the machining process with the aim of a targeted wetting and cooling of the tool at regular intervals. Thus, a significant reduction of the thermal load on the tool should provide a benefit to the drilling process and extend the tool life. Numerical and experimental investigations were used to analyze the introduced process strategy modification.

Influence of Thermo-Mechanical Processing on the Microstructure of Beryllia Dispersed Nickel Alloys

1973 ◽  
Vol 31 ◽  
pp. 184-185
Author(s):  
M.S. Grewal ◽  
S.A. Sastri ◽  
N.J. Grant
Keyword(s):  
High Temperature ◽  
Nickel Alloys ◽  
Thermomechanical Processing ◽  
Cold Work ◽  
High Temperature Strength ◽  
Strengthening Effect ◽  
Mechanical Processing ◽  
Uniform Dispersion ◽  
Oxide Particles ◽  
Nickel Base

Currently there is a great interest in developing nickel base alloys with fine and uniform dispersion of stable oxide particles, for high temperature applications. It is well known that the high temperature strength and stability of an oxide dispersed alloy can be greatly improved by appropriate thermomechanical processing, but the mechanism of this strengthening effect is not well understood. This investigation was undertaken to study the dislocation substructures formed in beryllia dispersed nickel alloys as a function of cold work both with and without intermediate anneals. Two alloys, one Ni-lv/oBeo and other Ni-4.5Mo-30Co-2v/oBeo were investigated. The influence of the substructures produced by Thermo-Mechanical Processing (TMP) on the high temperature creep properties of these alloys was also evaluated.

Application of TEM to Deformation, Wear, and Fracture of Ceramics

1974 ◽  
Vol 32 ◽  
pp. 472-473
Author(s):  
B. J. Hockey
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Mechanical Behavior ◽  
Brittle Materials ◽  
High Temperature Strength ◽  
Wide Range ◽  
Corrosive Environments ◽  
Further Development

Ceramics, such as Al2O3 and SiC have numerous current and potential uses in applications where high temperature strength, hardness, and wear resistance are required often in corrosive environments. These materials are, however, highly anisotropic and brittle, so that their mechanical behavior is often unpredictable. The further development of these materials will require a better understanding of the basic mechanisms controlling deformation, wear, and fracture.The purpose of this talk is to describe applications of TEM to the study of the deformation, wear, and fracture of Al2O3. Similar studies are currently being conducted on SiC and the techniques involved should be applicable to a wide range of hard, brittle materials.

Lattice Imaging of Grain Boundaries in Ceramics

1977 ◽  
Vol 35 ◽  
pp. 114-115
Author(s):  
D. R. Clarke ◽  
G. Thomas
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Silicon Nitride ◽  
Grain Boundaries ◽  
High Temperature Strength ◽  
Current Interest ◽  
Lattice Imaging ◽  
Special Significance ◽  
Structural Applications ◽  
Refractory Ceramics

Grain boundaries have long held a special significance to ceramicists. In part, this has been because it has been impossible until now to actually observe the boundaries themselves. Just as important, however, is the fact that the grain boundaries and their environs have a determing influence on both the mechanisms by which powder compaction occurs during fabrication, and on the overall mechanical properties of the material. One area where the grain boundary plays a particularly important role is in the high temperature strength of hot-pressed ceramics. This is a subject of current interest as extensive efforts are being made to develop ceramics, such as silicon nitride alloys, for high temperature structural applications. In this presentation we describe how the techniques of lattice fringe imaging have made it possible to study the grain boundaries in a number of refractory ceramics, and illustrate some of the findings.

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