Material characterization of Inconel 718 from free bulging test at high temperature

Yoo, Joon-Tae; Yoon, Jong Hoon; Lee, Ho-Sung; Youn, Sung‐Kie

doi:10.1007/s12206-012-0523-3

Cited by 19 publications

(6 citation statements)

References 15 publications

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“…This procedure is based on many years of experience in the assessment of drawability evaluation methods and modeling of manufacturing processes [1][2][3][4][5]. The basis of numerical modelling are experience and good FEM simulation practice acoording to [15,16] and especially for Inconel superalloys [17][18][19][20][21].…”

Section: Nickel Superalloysmentioning

confidence: 99%

Research on Liquid Forming Process of Nickel Superalloys Thin Sheet Metals

Hyrcza-Michalska¹

2017

Archives of Metallurgy and Materials

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The paper presents the study of drawability of thin sheet metals made of a nickel superalloy Inconel type. The manufacturing process of axisymmetric cup -cone and a closed section profile in the form of a circular tube were designed and analyzed. In both cases, working fluid-oil was used in place of the rigid tools. The process of forming liquid is currently the only alternative method for obtaining complex shapes, coatings, and especially if we do it with high-strength materials. In the case of nickel superalloys the search for efficient methods to manufacture of the shaped shell is one of the most considerable problems in aircraft industry [1][2][3][4][5]. However, the automotive industries have the same problem with so-called advanced high-strength steels (AHSS). Due to this, both industrial problems have been examined and the emphasis have been put on the process of liquid forming (hydroforming). The study includes physical tests and the corresponding numerical simulations performed, using the software Eta/Dynaform 5.9. Numerical analysis of the qualitative and quantitative forecasting enables the formability of materials with complex and unusual characteristics of the mechanical properties and forming technology. It has been found that only the computer aided design based on physical and numerical modeling, makes efficient plastic processing possible using a method of hydroforming. Drawability evaluation based on the determination of the mechanical properties of complex characteristics is an indispensable element of this design in the best practice of industrial manufacturing products made of thin sheet metals.

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Section: Nickel Superalloysmentioning

confidence: 99%

Research on Liquid Forming Process of Nickel Superalloys Thin Sheet Metals

Hyrcza-Michalska¹

2017

Archives of Metallurgy and Materials

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“…The material properties (thermal conductivity and specific heat) changed according to the temperature. 19 Tables 1 and 2 represent the thermal conductivity and specific heat of Inconel 718 and Nickel 201. The thermal analyses were performed with a material size of 60× 15×15 mm, convection heat of 5 W/m 2 · o C, and a feed rate of 100 mm/ min.…”

Section: Analysis Conditionsmentioning

confidence: 99%

Determination of the machining parameters of nickel-based alloys by High-Power diode laser

Kim

Lee

2015

Int. J. Precis. Eng. Manuf.

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Nickel-based alloys have good mechanical properties and excellent resistance to many corrosive environments, alongside a high degree of toughness and strength at high temperatures. However, nickel-based superalloys are extremely difficult-to-cut materials. The advantages of a laser-assisted machining (LAM) process are a decrease in cutting force and tool wear, an increase in the surface roughness and an increase in the material removal rate (MRR). Thermal analysis by the finite element method (FEM) and machining experiments on nickel-based alloys by LAM are carried out in this paper. The experiments focus on the measurement of the cutting force and surface roughness under a variety of processing conditions to improve the surface quality. The results of this study can be applied for the similar difficult-to-cut materials.

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“…By applying relatively low gas pressure, the cooling channel can be blow formed to near net shape. IN718 sheet with grain size of about 5 micron was tested for forming parameters and the optimum forming condition was a strain rate of 5 x 10 -4 /sec at 980℃ [5]. After careful investigation to choose the efficient welding method, electron beam welding (EBW) was executed with focusing current of 14.6mA and welding current of 6mA.…”

Section: Forming Of Cone Shape Chamber Extensionmentioning

confidence: 99%

Superplastic Blow Forming of Aerospace Components

Lee

Yoo

2014

KEM

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Many metals, such as titanium and superalloys, are used for a wide range of aerospace applications, which include aircraft gas turbine engine and space launcher propulsion engine. In order to manufacture a stiffened extension with superplastic blow forming at elevated temperature, the structural integrity of the joint part was investigated since the welded or bonded joint of internal channels should maintain its strength during superplastic blow forming process. Various types of joint methods were performed in order to investigate microstructural and mechanical properties of the bonded specimen at elevated temperature. In this paper, the possibility of manufacturing combustion chamber and other aerospace components with superplastic blow forming of titanium and superalloy was demonstrated. An innovative manufacturing method to produce complex configuration from titanium multi-sheets by superplastic forming with low hydrostatic pressure was presented. The result also shows that the manufacturing method with superplastic blow forming of multi-sheets of IN718 alloy has been successfully demonstrated for near net shape forming of subscale nozzle extension cone with internal channels.

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Material characterization of Inconel 718 from free bulging test at high temperature

Cited by 19 publications

References 15 publications

Research on Liquid Forming Process of Nickel Superalloys Thin Sheet Metals

Research on Liquid Forming Process of Nickel Superalloys Thin Sheet Metals

Determination of the machining parameters of nickel-based alloys by High-Power diode laser

Superplastic Blow Forming of Aerospace Components

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