TY - GEN
T1 - PREDICTION OF HOT DEFORMATION BEHAVIORS UNDER MULTIAXIAL LOADING USING GURSON-TVERGAARD-NEEDLEMAN DAMAGE MODEL FOR INCONEL 718 ALLOY THIN SHEET
AU - Mahalle, Gauri
AU - Kotkunde, Nitin
AU - Gupta, Amit Kumar
AU - Singh, Swadesh Kumar
AU - Nikhare, Chetan P.
N1 - Funding Information:
Authors would like to thank Human Resource Development Group, Council of Scientific and Industrial Research, Government of India (File no: 09/1026(0038)/2020.EMR-I), for financial support.
Publisher Copyright:
Copyright © 2021 by ASME
PY - 2021
Y1 - 2021
N2 - Inconel 718 is a high strength, precipitation-hardenable Ni-Fe-Cr-based superalloys, mostly used in nuclear and aerospace applications in extreme working conditions. In this work, hot deformation behavior of the Inconel 718 alloy sheet has been investigated at 700°C under multiaxial loading conditions. The forming behavior has been analyzed along three distinct deformation modes (biaxial stretch, plane strain, and uniaxial stress regions) and results were quantified using a Gurson-Tvergaard-Needleman (GTN) damage model. Firstly, uniaxial tensile tests have been performed at 700ºC and quasi-static strain rates (0.0001- 0.01 s -1) to identify the material constants of the damage model. Further, the standard Nakazima test has been conducted to describe the forming and fracture behavior along three deformation modes. Further, Marciniak-Kuczynski model using a GTN damage model with Barlat'89 anisotropic yield criteria have been used for theoretical prediction of failure strains for Inconel 718 alloy. This model shown a good prediction capability in terms of fracture strains. Subsequently, Finite element (FE) analysis of Nakazima test coupled with plastic and damage modeling has been carried out to predict failure behavior of the Inconel alloy. The FE predicted results showed good agreement with the experimental test in predicting the fracture behavior of the alloy. The presented results give a basis of optimal hot forming process of Inconel 718 alloy.
AB - Inconel 718 is a high strength, precipitation-hardenable Ni-Fe-Cr-based superalloys, mostly used in nuclear and aerospace applications in extreme working conditions. In this work, hot deformation behavior of the Inconel 718 alloy sheet has been investigated at 700°C under multiaxial loading conditions. The forming behavior has been analyzed along three distinct deformation modes (biaxial stretch, plane strain, and uniaxial stress regions) and results were quantified using a Gurson-Tvergaard-Needleman (GTN) damage model. Firstly, uniaxial tensile tests have been performed at 700ºC and quasi-static strain rates (0.0001- 0.01 s -1) to identify the material constants of the damage model. Further, the standard Nakazima test has been conducted to describe the forming and fracture behavior along three deformation modes. Further, Marciniak-Kuczynski model using a GTN damage model with Barlat'89 anisotropic yield criteria have been used for theoretical prediction of failure strains for Inconel 718 alloy. This model shown a good prediction capability in terms of fracture strains. Subsequently, Finite element (FE) analysis of Nakazima test coupled with plastic and damage modeling has been carried out to predict failure behavior of the Inconel alloy. The FE predicted results showed good agreement with the experimental test in predicting the fracture behavior of the alloy. The presented results give a basis of optimal hot forming process of Inconel 718 alloy.
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U2 - 10.1115/IMECE2021-70845
DO - 10.1115/IMECE2021-70845
M3 - Conference contribution
AN - SCOPUS:85124412860
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
BT - Advanced Manufacturing
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 2021 International Mechanical Engineering Congress and Exposition, IMECE 2021
Y2 - 1 November 2021 through 5 November 2021
ER -