Mechanical properties of hot deformed Inconel 718 and X750

• Autorzy: Nowotnik A. , Pędrak P. , Sieniawski J. , Góral M.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Variations of a flow stress vs. true strain illustrate behavior of material during plastic deformation. Stress-strain relationship is generally evaluated by a torsion, compression and tensile tests. Design/methodology/approach: Compression tests were carried out on precipitations hardenable nickel based superalloys of Inconel 718 and X750 at constant true strain rates of 10^-4, 4x10^-4, s^-1, within temperature through which precipitation hardening phases process occurred (720-1150°C) using thermomechanical simulator Gleeble and dilatometer Baehr 850D/L equipped with compression unit. True stress-true strain curves analysis of hot deformed alloys were described. Findings: On the basis of received flow stress values activation energy of a high-temperature deformation process was estimated. Mathematical dependences (σ_pl -T i σ_pl - ε) and compression data were used to determine material’s constants. These constants allow to derive a formula that describes the relationship between strain rate (e), deformation temperature (T) and flow stress σ_pl. Research limitations/implications Study the flow stress will be continued on the samples after the aging process. Practical implications: The results of high-temperature deformation of the examined Inconel alloys may possibly find some practical use in the workshop practice to predict a flow stress values, but only within particular temperature and strain rate ranges. The results of the study can be used in the aerospace industry to produce blades for jet engines. Originality/value: The results of the study can be used in the aerospace industry to produce blades for jet engines.

Słowa kluczowe

EN

flow stress; plastic deformation; Inconel; superalloys; activation energy

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2012
• Tom: Vol. 50, nr 2
• Strony: 74--80
• Opis fizyczny: Bibliogr. 19 poz., rys., tab.

Twórcy

autor

Nowotnik A.

• Department of Materials Science, The Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology, Al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland

autor

Pędrak P.

• Department of Materials Science, The Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology, Al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland

autor

Sieniawski J.

• Department of Materials Science, The Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology, Al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland

autor

Góral M.

• Department of Materials Science, The Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology, Al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland

Bibliografia

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