The high-temperature strength and plastic properties of Incoloy 800HT and Invar 36 alloys

Kawulok, Petr; Kawulok, Rostislav; JUREK, David; Puzoň, David; Schindler, Ivo; Opěla, Petr; Rusz, Stanislav; Kawuloková, Monika

doi:10.37904/metal.2021.4099

Cited by 2 publications

(1 citation statement)

References 12 publications

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“…The most common types of sheet metal that are formed through processes using elastomeric materials are aluminium [ 7 , 8 ] and aluminium alloys [ 9 ]. However, difficult-to-deform materials, such as high-strength steels [ 10 ], titanium alloys [ 11 ] or Ni-based superalloys [ 12 , 13 ], can be successfully formed. The use of this type of alloy to form processes with elastomeric materials causes many problems.…”

Section: Introductionmentioning

confidence: 99%

Experimental Research and Numerical Modelling of the Cold Forming Process of the Inconel 625 Alloy Sheets Using Flexible Punch

Balcerzak,

Żaba,

Hojny

et al. 2023

Materials

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The paper presents the numerical and experimental results of research aimed at determining the influence of hardness in the range of 50–90 Shore A of layered tools composed of elastomeric materials on the possibility of forming Inconel 625 nickel-based alloy sheets. A stamping die composed of 90MnCrV8 steel (hardness 60HRC) was designed for forming embosses in drawpieces, ensuring various stress states on the cross-section of the formed element. The principle of operating the stamping die was based on the Guerin method. The finite-element-based numerical modelling of the forming process for various configurations of polyurethane inserts was also carried out. The drawpieces obtained through sheet forming were subjected to geometry tests using optical 3D scanning. The results confirmed that, in the case of forming difficult-to-deform Inconel 625 Ni-based alloy sheets, the hardness of the polyurethane inserts significantly affected the geometric quality of the obtained drawpieces. The assumptions determined in numerical simulations were verified in experimental studies. Based on the test results, it was concluded that the selection of polyurethane hardness should be determined by the shape of the formed element. Significant nonuniform sheet metal deformations were also found, which may pose a problem in the process of designing forming tools and the technology of the plastic forming of Inconel 625 Ni-based alloy sheets.

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Section: Introductionmentioning

confidence: 99%

Experimental Research and Numerical Modelling of the Cold Forming Process of the Inconel 625 Alloy Sheets Using Flexible Punch

Balcerzak,

Żaba,

Hojny

et al. 2023

Materials

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An Investigation into Sheet-Inconel 718 Forming with Flexible and Metal Tools—Simulation and Experiment

Balcerzak,

Rusz,

Čada

et al. 2024

Materials

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The article presents the results of numerical simulations and experimental tests of plastic forming sheets made from the difficult-to-deform nickel alloy Inconel 718 with a thickness of 1 mm, using punches made from elastomeric materials with hardness 50–90 Shore A and steel dies. Elastomeric stamps were created in the form of five layers with a diameter of 160 mm. The influence of the hardness of the elastomeric punches on the geometry of the elements obtained was determined. The dies were made from 90MnCrV8 steel with a hardness of over 60 HRC. Their task was to obtain the expected shape of the element while generating various stress states in specific areas of the semi-finished product. The research was carried out using an original device whose operating principle was based on the Guerin method. The shape and dimensions of the elements made from Inconel 718 nickel alloy were determined by optical 3D scanning. The geometry of the drawpiece showed a significant impact of the hardness of the layered elastomer matrices on the degree of shape reproduction. The results obtained from numerical modeling were confirmed by the results of experimental tests. It has been shown that the hardness of the elastomeric material used for punches for plastic forming Inconel 718 nickel alloy sheets should be adapted to the shape of the drawpiece. It was also found that one of the important aspects of plastic forming sheets using the Guerin method is the tendency to obtain a diversified shape of the final elements.

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The high-temperature strength and plastic properties of Incoloy 800HT and Invar 36 alloys

Cited by 2 publications

References 12 publications

Experimental Research and Numerical Modelling of the Cold Forming Process of the Inconel 625 Alloy Sheets Using Flexible Punch

Experimental Research and Numerical Modelling of the Cold Forming Process of the Inconel 625 Alloy Sheets Using Flexible Punch

An Investigation into Sheet-Inconel 718 Forming with Flexible and Metal Tools—Simulation and Experiment

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