Low heat input welding of nickel superalloy GTD-111 with Inconel 625 filler metal

2018 ◽  
Vol 60 (1) ◽  
pp. 22-30 ◽  
Author(s):  
Athittaya Athiroj ◽  
Panyawat Wangyao ◽  
Fritz Hartung ◽  
Gobboon Lothongkum
Keyword(s):  
Heat Input ◽  
Filler Metal ◽  
Nickel Superalloy ◽  
Inconel 625

Analysis of the oxide occurrence on WEDM surfaces in relation to subsequent surface treatments

2019 ◽  
Vol 234 (3) ◽  
pp. 721-733 ◽  
Author(s):  
K Mouralova ◽  
T Prokes ◽  
L Benes
Keyword(s):  
Electrical Discharge Machining ◽  
Surface Oxidation ◽  
Nickel Superalloy ◽  
Surface Treatments ◽  
Hadfield Steel ◽  
Inconel 625 ◽  
High Tendency ◽  
Surface Protection ◽  
Visual Appearance ◽  
Metallic Aluminium

Surface treatments are typical surface protection against corrosion or serve to create an attractive appearance for the end customer. However, the surface to which they are applied must be completely oxide-free, otherwise, defects occur which can cause subsequent corrosion or deterioration of the visual appearance of the product. The parts manufactured by wire electrical discharge machining, however, have a high tendency to oxidize. For this reason, this study was aimed at demonstrating the effect of machine setup parameters (gap voltage, pulse on and off time, wire feed and discharge current) on oxygen occurrence on the surface of two non-metallic (aluminium alloy 7475-T7351, chromium nickel superalloy Inconel 625) and four metallic materials (tool alloy steel X210Cr12, Hadfield steel, Creusabro 4800 and Hardox 400). Within this study, 18 samples were produced, where the chemical composition of energy-dispersive X-ray was analysed, on the basis of which the effect of these parameters on the surface oxidation was proved.

Process Design for Superalloys Sheet Rotary Forming

2020 ◽  
Vol 985 ◽  
pp. 91-96
Author(s):  
Krzysztof Zaba ◽  
Sandra Puchlerska ◽  
Tomasz Pieja ◽  
Jaroslaw Pyzik
Keyword(s):  
Process Design ◽  
Elevated Temperatures ◽  
Nickel Superalloy ◽  
Inconel 625 ◽  
Quality Factors ◽  
Forming Process ◽  
Plastic Properties ◽  
Temperature Oxidation ◽  
Wide Range ◽  
The Impact

Inconel 625 is a nickel superalloy, characterized by high fatigue strength. The alloy is resistant to a wide range of corrosive environments, including high-temperature oxidation. For this reason, it is an attractive material for the chemical, shipbuilding and aviation industries. Inconel 625 alloy is designed for plastic working. However, the significant difficulty is the appropriate process design, due to the high deformation resistance. In order to improve the plastic properties of the alloy, processing at elevated temperatures is practiced. In this work, attempts were made to implement rotary forming process of Inconel 625 superalloy. For this purpose, an experiment was designed, investigating the impact of three variables on the process – feed rate, spinning rate and heating. For the tests were used Inconel 625 metal plates in the shape of discs. Axial-symmetrical products were formed, using a spinning machine. The geometry of the products according to selected quality factors was investigated. Optimal process parameters were chosen using multivariate statistical optimization. These parameters will be used to set up processes to obtain product that meets quality requirements.

Microstructure and Mechanical Properties of Aluminum/Stainless Steel Joints Welded by Different Weld Heat Input

2011 ◽  
Vol 189-193 ◽  
pp. 3253-3256
Author(s):  
Hong Tao Zhang ◽  
Jia Kun Liu ◽  
Hong Yun Zhao
Keyword(s):  
Mechanical Properties ◽  
Heat Input ◽  
Filler Metal ◽  
Dissimilar Metals ◽  
Coated Steel ◽  
Microstructure And Mechanical Properties ◽  
Zinc Coated Steel ◽  
Interfacial Intermetallic Compound ◽  
Steel Joints ◽  
Aluminum Base

Dissimilar metals joints between aluminum and zinc-coated steel were joined by CMT machine with ER4043 filler metal. The microstructure and mechanical properties of the joints obtained with different heat input were analyzed. The results showed that the thickness of interfacial intermetallic compound was determined by the welding heat input. Tensile specimens were broken in HAZ of aluminum base metal and the tensile strength of the joint can reach 122.3MPa.

scholarly journals Construction of productivity windows for fillet welds using the FCAW process for thin ship panel manufacturing

2019 ◽  
Vol 12 (24) ◽  
pp. 17
Author(s):  
Styvens Hernandez Palacio ◽  
Mateo Cardona Castaño ◽  
Jorge E. Giraldo Barred
Keyword(s):  
Heat Input ◽  
Filler Metal ◽  
Fillet Welds ◽  
Welding Parameters ◽  
Horizontal Position ◽  
Trial And Error ◽  
T Joints ◽  
Acceptable Quality ◽  
A36 Steel ◽  
Wire Feed

The FCAW process used filler metal E71T-11 of Ø0.035” to apply fillet welds with a size of ~4mm on T-joints made of ASTM A36 steel, in a horizontal position, using 42 appropriate combinations of wire feed speeds -WFS- (between 50 and 540 ipm), voltages (13-33V) and welding speeds (4.2-24.5 ipm). The test welds applied with each combination were inspected visually and by macro-attack to establish their compliance with the acceptance criteria for naval panels provided by the American Bureau of Shipping - ABS. With these results, Voltage vs. WFS, Voltage vs. Amperage and Heat Input vs. WFS graphs were constructed, and productivity windows were drawn over them including the combinations of welding parameters capable of producing welds of acceptable quality. The productivity windows obtained with this method, called ARCWISE, allow proper welding parameters to be selected during the design of WPSs avoiding iterative processes of trial and error.

Characteristics of Inconel 625 Filler Metal Affecting to Weld and Deposited Metal Zones in the Case of Welded to Forged Steel for Piston Crown Material

2014 ◽  
Vol 1004-1005 ◽  
pp. 1114-1119
Author(s):  
Sung Yul Lee ◽  
Kyung Man Moon ◽  
Jong Pil Won ◽  
Jae Hyun Jeong ◽  
Tae Sil Baek
Keyword(s):  
Corrosion Resistance ◽  
Weld Metal ◽  
Base Metal ◽  
Anodic Polarization ◽  
Corrosion Potential ◽  
Filler Metal ◽  
Polarization Curves ◽  
Inconel 625 ◽  
Piston Crown ◽  
Deposited Metal

Recently, wear and corrosion of the engine parts surrounded with combustion chamber is more serious compared to the other parts of the engine due to using of heavy oil of low quality. Therefore, an optimum repair welding for these parts is very important to prolong their lifetime in a economical point of view. In this study, Inconel 625 filler metal was welded with GTAW method in the forged steel which would be generally used with piston crown material. In this case, the mechanical and corrosion properties between weld metal zone (WM) welded to the groove which were artificially made in the base metal and deposited metal zone (DM) only welded by Inconel 625 filler metal on the surface of the base metal were investigated using electrochemical methods, such as measurement of corrosion potential, anodic polarization curves, cyclic voltammogram and impedance etc. in 35% H2SO4 solution. The deposited metal zone exhibited a better corrosion resistance compared to the weld metal zone, furthermore, its corrosion potential was a nobler value rather than that of the weld metal zone. However, the hardness indicated more or less higher value in the weld metal zone. The corrosive products after measurement of anodic polarization curves was hardly observed both in the weld and deposited zones, while, the morphologies of the corroded surfaces exhibited general and pitting corrosion in the weld and deposited metal zones respectively. The fine pearlite microstructure was a little observed in the weld metal zone, moreover, the microstructure of ferrite with elliptical pattern was significantly increased in the deposited metal zone. As a result, it is considered that the amount of Cr, Mo and Ni having a high corrosion resistance diffuse and migrate from the weld metal zone to the base metal zone, thus, the deposited metal zone indicated a better corrosion resistance than the weld metal zone because the amount of Cr, Mo and Ni were much involved in deposited metal zone compared to the weld metal zone.

Effects of heat input on the pitting resistance of Inconel 625 welds by overlay welding

2015 ◽  
Vol 21 (2) ◽  
pp. 350-355 ◽  
Author(s):  
Jun Seok Kim ◽  
Young IL Park ◽  
Hae Woo Lee
Keyword(s):  
Heat Input ◽  
Inconel 625 ◽  
Overlay Welding

Effect of heat input on mechanical and microstructural properties of Inconel 625 depositions processed in wire arc additive manufacturing

2021 ◽  
pp. 095440892110047
Author(s):  
DT Sarathchandra ◽  
MJ Davidson
Keyword(s):  
Heat Input ◽  
Elevated Temperatures ◽  
Microstructural Characterization ◽  
Deposition Process ◽  
Columnar Structure ◽  
Inconel 625 ◽  
Cold Metal Transfer ◽  
Electron Microscopes ◽  
Cold Metal ◽  
Wire Arc Additive Manufacturing

Inconel 625 alloy resists corrosion, fatigue and wear at elevated temperatures and hence they are used in aerospace, chemical, petrochemical, marine, and other high-temperature applications. In the present study, single beads of Inconel 625 were deposited using the cold metal transfer (CMT) based wire arc deposition process. Seven heat input conditions were used to study the microstructure and mechanical characteristics. Microstructural characterization was done with optical and scanning electron microscopes while microhardness was measured using the Vickers microhardness testing method. It has been observed that the microstructure of the deposited beads consists of a columnar structure with primary dendrites. Also, intermetallic elements like Niobium (Nb), Molybdenum (Mo), and Laves were formed. It was also observed that the percentage of Nb and Mo increases with heat input. The microhardness increases with an increase in heat input and the maximum hardness was found to be 234.7 HV.

Characteristics Evaluation on Welding Metal Zones Welded with Inconel 625 Filler Metal to Cast Steel for Piston Crown Material

2015 ◽  
Vol 39 (5) ◽  
pp. 542-547
Author(s):  
Jae-Hyun Jeong ◽  
Kyung-Man Moon ◽  
Sung-Yul Lee ◽  
Myeong-Hoon Lee ◽  
Tae-Sil Baek
Keyword(s):  
Filler Metal ◽  
Cast Steel ◽  
Inconel 625 ◽  
Piston Crown ◽  
Welding Metal

Solidification Cracking Susceptibility of Alloy 52 Weld Overlay on 316L Stainless Steel

2011 ◽  
Vol 704-705 ◽  
pp. 529-534
Author(s):  
Wei Chih Chung ◽  
Lv Wen Tsay ◽  
Chun Chen
Keyword(s):  
Stainless Steel ◽  
Heat Input ◽  
Nuclear Power ◽  
Filler Metal ◽  
Solidification Cracking ◽  
Weld Overlay ◽  
Overlay Welding ◽  
Solidification Cracks ◽  
Filler Metals ◽  
Weld Overlays

Nickel-based filler metals are widely used in the nuclear power industry for overlay welding of austenitic stainless steel components. However, solidification cracking in the weld metal has been observed in a number of cases after the initial deposit of Alloy 52 filler metal on the 316L substrate. In this study, Alloy 52 and its 52M modification were employed to perform overlay welding on 316L specimens. With proper welding heat input, no solidification cracks were observed in the transition zone of both weld overlays. As the heat input increased, solidification cracks could be found in the welds but was found to a lesser extent in Alloy 52M overlays. Nevertheless, such cracks could be eliminated by applying 309L filler metal as a buffer. This could be related to lower S and P contents in the buffer layer to reduce solidification cracking susceptibility of the subsequent weld passes. Additionally, the results of spot Varestraint tests also indicated that Alloy 52M had better solidification and ductility-dip cracking resistances than Alloy 52.

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