Study on constitutive model and deformation mechanism in high speed cutting Inconel718

• Autorzy: Hao Zhao Peng , Li Ji Ning , Fan Yi Hang , Ji Fang Fang

Identyfikatory

DOI

10.1016/j.acme.2018.11.009

• Języki publikacji: EN

Abstrakty

EN

The nickel-based alloy Inconel718 is a multi-component complex alloy. There exists complex cutting deformation, higher cutting temperature, higher cutting force and formation of serrated chip in the machining process. However, the formation time of every saw tooth unit in serrated chip is very short. It is difficult to use traditional method to analyze the chip at any time. Simulation analysis, integrated with the experimental results, was used to study the whole process of cutting deformation. The Johnson–Cook (JC) constitutive model of Inconel718 under high speed and high strain rate is established through split Hopkinson pressure bar (SHPB) test. The finite element method was used to study the deformation process. Combining the analysis of metallographic pictures which were obtained in the cutting experiment, the plastic behavior evolution of material in the cutting zone is deeply studied to further reveal the forming mechanism of serrated chip. The results showed that the local temperature in the cutting zone increased rapidly. The appearance of thermal softening of materials led to the change of stress distribution in the cutting zone. The thermoplastic shear instability further appeared which resulted in the shear localization, subsequently leading to the uneven deformation of chip and then serrated chip formed.

Słowa kluczowe

EN

split Hopkinson pressure bar; SHPB; Johnson-Cook model; serrated chip; adiabatic shear

PL

dzielony pręt Hopkinsona; temperatura cięcia; metoda elementów skończonych

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2019
• Tom: Vol. 19, no. 2
• Strony: 439--452
• Opis fizyczny: Bibliogr. 24 poz., rys., wykr.

Twórcy

autor

Hao Zhao Peng

• School of Mechatronic Engineering, ChangChun University of Technology, ChangChun 130012, China

autor

Li Ji Ning

• School of Mechatronic Engineering, ChangChun University of Technology, ChangChun 130012, China

autor

Fan Yi Hang

• School of Mechatronic Engineering, ChangChun University of Technology, ChangChun 130012, China

autor

Ji Fang Fang

• School of Mechatronic Engineering, ChangChun University of Technology, ChangChun 130012, China

Bibliografia

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