Prediction of forming limits and microstructural evolution during warm stretch forming of DP590 steel

Pandre, Sandeep; Morchhale, Ayush; Kotkunde, Nitin; Singh, Swadesh Kumar; Sujith, R. I.

doi:10.1007/s43452-021-00262-y

Cited by 9 publications

(3 citation statements)

References 46 publications

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“…Thus, the volume consistency equation has been followed for evaluating the fracture strains of the specimens. 52 No significant stretching of the material in the lateral direction across the necked region has been observed after the appearance of necking in the specimens at both of the temperatures. Rather, the thinning of the specimens took place because of the excessive strain localization.…”

Section: Resultsmentioning

confidence: 87%

Prediction of fracture limits of IN625 alloy by coupling ductile damage models and anisotropic yielding functions with the classical Marciniak and Kuczyński model

Morchhale

Kotkunde

Singh³

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part B:

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The fracture forming limit diagram (FFLD) is gaining special attention in high strength materials where the necking tendency rarely occurs during sheet metal forming processes. In the present work, the classical Marciniak and Kuczyński (MK) model has been modified by coupling it with different ductile damage models (Cockcroft and Latham, Brozzo, Oyane, Ko, Oh, Rice and Tracey, McClintock and Clift) and anisotropic yielding functions (Hill 1948 and Barlat 1989) to predict the fracture limits of Inconel 625 (IN625) alloy at different temperatures. Firstly, uniaxial tensile testing has been conducted for the determination of important mechanical properties. Consequently, stretch forming experiments have been performed to analyze the forming limits of a material. It has been found that the safe and fracture forming limits of the material increased by approximately 17.26% and 22.22%, respectively, on increasing the temperature from 300 to 673 K. From the comparative analysis of different combinations of ductile damage models and yielding functions, the Cockcroft and Latham (C-L) damage model in combination with the Barlat 1989 yielding function helped in best predicting the theoretical FFLD as it displayed the least average root mean square error (RMSE) of 0.033. The other ductile damage models used for predicting the theoretical fracture limits displayed large error; hence, they should not be considered while designing a critical component in the manufacturing industry using IN625 alloy.

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Section: Resultsmentioning

confidence: 87%

Prediction of fracture limits of IN625 alloy by coupling ductile damage models and anisotropic yielding functions with the classical Marciniak and Kuczyński model

Morchhale

Kotkunde

Singh³

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…𝐶 2 𝜀̅ 𝑏0 = 𝐶 3 (10) Additionally, the proposed fracture criterion can be reduced to Eq. 11 in the case pure shear (…”

Section: ∫ ( 2𝜏mentioning

confidence: 99%

“…It has been used widely till today for evaluating the thickness reduction and localized strains on sheet metals. Nevertheless, the FLDs evaluated using the above mentioned conventional method given by Keeler and Backofen are not sufficient for the accurate prediction of fracture in case of various high strength metals, since the failure occurs with a very little or no hint of necking [10]. Bao and Wierzbicki [11] and Pandre et al [12] reported that the ductile damage models are an alternative tool for the accurate prediction of fracture in the regions of low stress triaxiality.…”

Section: Introductionmentioning

confidence: 99%

Fracture Prediction of Inconel Sheet Deformed under Different Stress States

Morchhale

Ural

Arvikar

et al. 2022

Preprint

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The present work focuses on the prediction of onset of fracture for thin-walled metallic sheets used for forming complex shape and lightweight components for aerospace applications. The Lou-Huh ductile damage model has been used along with Barlat 1989 anisotropic yielding function for the prediction of fracture limits of Inconel alloy in different stress states, namely, pure shear, uniaxial tension, pure strain and equi-biaxial tension. Nine different types of specimens have been deformed experimentally till the occurrence of fracture using simple tensile test and stretch forming setup. The principal stresses at the onset of fracture have been determined experimentally and numerically and plotted in the major-minor strain space and, further, have been transformed into the effective plastic strain to fracture vs. stress triaxiality space. The fracture sites in the numerical simulations have been found to be consistent with the experimental results. Cockcroft-Latham, Brozzo, Oh and Rice-Tracey model have also been used for determining the fracture locus but the Lou–Huh model has only been found to accurately predict the fracture limit in all the stress states for a wide range of stress triaxiality as it considers the effect of shear-linkage of voids.

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Stretch-Flanging Behavior of Dual-Phase Steel Using Single-Point Incremental Forming Process

Pandre

Morchhale

Kotkunde

et al. 2022

The Minerals, Metals &Amp; Materials Series

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Prediction of forming limits and microstructural evolution during warm stretch forming of DP590 steel

Cited by 9 publications

References 46 publications

Prediction of fracture limits of IN625 alloy by coupling ductile damage models and anisotropic yielding functions with the classical Marciniak and Kuczyński model

Prediction of fracture limits of IN625 alloy by coupling ductile damage models and anisotropic yielding functions with the classical Marciniak and Kuczyński model

Fracture Prediction of Inconel Sheet Deformed under Different Stress States

Stretch-Flanging Behavior of Dual-Phase Steel Using Single-Point Incremental Forming Process

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