Weldability of Nickel-Base Alloys

Caron, Jeremy L.; Sowards, Jeffrey W.

doi:10.1016/b978-0-08-096532-1.00615-4

Cited by 33 publications

(28 citation statements)

References 33 publications

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“…Special metals corporation and Haynes international Inc have developed many alloys which can be used for high temperature E3S Web of Conferences 184, 01040 (2020) https://doi.org/10.1051/e3sconf/202018401040 ICMED 2020 applications and also corrosion resisting environment. Table 1 provides an overview of important nickel based super alloys and its commercial examples and also the weldability concerns of these alloys [6].…”

Section: Figmentioning

confidence: 99%

Weldability, Mechanical Properties and Microstructure of Nickel Based Super Alloys: a review

Sashank¹,

Rajakumar

Karthikeyan³

et al. 2020

E3S Web Conf.

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Welding of Nickel Based Super Alloys has been challenging due to the cracking and microstructure segregation of alloying elements. These super alloys are often used in extreme environments like in Turbine Blades, Boilers of Waste incinerators, Seals, Turbocharger rotors, high temperature fasteners, pressure vessels etc. The major application include Aerospace and Automobile Industry. The current paper will cover the relevant published work on welding processes and the challenges that were faced to weld nickel based super alloys. The review will go on to describe the weldability, microstructure and mechanical properties that are produced during and after the welding process. This paper will mainly focus on nickel based super alloys and poses many challenges which need to be focused and solved to produce an operational system in an acceptable time frame.

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Section: Figmentioning

confidence: 99%

Weldability, Mechanical Properties and Microstructure of Nickel Based Super Alloys: a review

Sashank¹,

Rajakumar

Karthikeyan³

et al. 2020

E3S Web Conf.

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“…The range identified in relation to weld deposit NiCr30Fe9 is presented in Figure 1b, whereas that in relation to the welds made of steel 7CrMoVTiB10-10 is presented in Figure 1c. The cracking mechanism and factors affecting susceptibility to cracking have not been entirely identified yet [11,[14][15][16].…”

Section: Ductility-dip Brittlenessmentioning

confidence: 99%

“…Dependence of plasticity on temperature in relation to alloys susceptible and non-susceptible to ductility-dip brittleness: a) schematic diagram according to[14], b) range in relation to weld deposit NiCr30Fe9[15], c) range in relation to the welds made of steel 7CrMoVTiB10-10[16] …”

mentioning

confidence: 99%

A New Look at the Classification of Cracks in Welded and Braze Welded Joints

Pańcikiewicz

Tuz

Żurek

2018

eBIS

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“…Weldability of this material has shown drawbacks like lack of penetration, loss of strength in heat-affected zone (HAZ), microfissuring in fusion zone (FZ), etc. [1][2][3]. To overcome these difficulties, welding methods like gas metal arc welding (GMAW) and gas tungsten arc welding (GTAW) are employed to weld these materials.…”

Section: Introductionmentioning

confidence: 99%

“…Cut layout of welded specimen for tensile test microstructure of the base metal. These precipitates are in the form of titanium carbide (TiC) or titanium nitride (TiN) that tends to reduce the formation of porosity and increase the high-temperature strength and hardness of base metal[1,2,26].Figure 5depicts macrostructure of weld specimen (test sample 7) which shows no evidence of any sort microfissuring or any form of cracking in the macrographical study. The formation of spatter, porosity, etc.…”

mentioning

confidence: 99%

Development of ANN modelling for estimation of weld strength and integrated optimization for GTAW of Inconel 825 sheets used in aero engine components

Choudhury

Chandrasekaran

Devarasiddappa

2020

J Braz. Soc. Mech. Sci. Eng.

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Nickel-based superalloys are widely used in fabrication of components in aero space and nuclear sectors due to excellent strength, corrosion resistance, good ductility and high-temperature resistance. Inconel 825 superalloy is predominantly used for making aircraft engine components. This work investigates single pass welding of Inconel 825 strips employing gas tungsten arc welding. Four weld parameters, viz. welding speed (V), welding current (I), arc length (N) and gas flow rate (GFR), were used to investigate ultimate tensile strength (UTS) of weld employing Box-Behnken design having 27 experiments. The welding current is found the most dominating factor followed by welding speed (V). Higher heat input with low welding speed increases deposition rate that ensures more strength in weldment. Microstructural analysis shows two different grain boundaries, i.e., solidification sub-grain boundaries and solidification grain boundaries, in fusion zone. Artificial neural network (ANN) modelling for UTS is developed, and its predictive capability is compared with multiple regression analysis. A new integrated ANN-TLBO-based soft computing modelling and optimization approach is proposed for obtaining optimum weld parameters to maximize weld strength. The proposed optimization methodology obtained maximum UTS of 701.73 MPa at optimal weld parameters I = 120 A, V = 180 mm/min, GFR= 12 l/min and N = 2.24 mm. Validation result was found highly encouraging with 0.60% error with confirmation experiment. The proposed method has better convergent capability with minimum number of iterations.

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Weldability of Nickel-Base Alloys

Cited by 33 publications

References 33 publications

Weldability, Mechanical Properties and Microstructure of Nickel Based Super Alloys: a review

Weldability, Mechanical Properties and Microstructure of Nickel Based Super Alloys: a review

A New Look at the Classification of Cracks in Welded and Braze Welded Joints

Development of ANN modelling for estimation of weld strength and integrated optimization for GTAW of Inconel 825 sheets used in aero engine components

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