A Modified Johnson-Cook Model for Ferritic-Pearlitic Steel in Dynamic Strain Aging Regime
In this study, the flow stress behavior of ferritic-pearlitic steel (C45E steel) is investigated through isothermal compression testing at different strain rates (1 s<sup>−1</sup>, 5 s<sup>−1</sup>, and 60 s<sup>−1</sup>) and temperat...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-05-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/9/5/528 |
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| author | Ashwin Moris Devotta P. V. Sivaprasad Tomas Beno Mahdi Eynian Kjell Hjertig Martin Magnevall Mikael Lundblad |
| author_facet | Ashwin Moris Devotta P. V. Sivaprasad Tomas Beno Mahdi Eynian Kjell Hjertig Martin Magnevall Mikael Lundblad |
| author_sort | Ashwin Moris Devotta |
| collection | DOAJ |
| description | In this study, the flow stress behavior of ferritic-pearlitic steel (C45E steel) is investigated through isothermal compression testing at different strain rates (1 s<sup>−1</sup>, 5 s<sup>−1</sup>, and 60 s<sup>−1</sup>) and temperatures ranging from 200 to 700 °C. The stress-strain curves obtained from experimental testing were post-processed to obtain true stress-true plastic strain curves. To fit the experimental data to well-known material models, Johnson-Cook (J-C) model was investigated and found to have a poor fit. Analysis of the flow stress as a function of temperature and strain rate showed that among other deformation mechanisms dynamic strain aging mechanism was active between the temperature range 200 and 400 °C for varying strain rates and J-C model is unable to capture this phenomenon. This lead to the need to modify the J-C model for the material under investigation. Therefore, the original J-C model parameters <i>A</i>, <i>B</i> and <i>n</i> are modified using the polynomial equation to capture its dependence on temperature and strain rate. The results show the ability of the modified J-C model to describe the flow behavior satisfactorily while dynamic strain aging was operative. |
| first_indexed | 2024-12-23T02:10:17Z |
| format | Article |
| id | doaj.art-9fb5d5db7b314b4d81ffe3d7595970ca |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-12-23T02:10:17Z |
| publishDate | 2019-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-9fb5d5db7b314b4d81ffe3d7595970ca2022-12-21T18:03:48ZengMDPI AGMetals2075-47012019-05-019552810.3390/met9050528met9050528A Modified Johnson-Cook Model for Ferritic-Pearlitic Steel in Dynamic Strain Aging RegimeAshwin Moris Devotta0P. V. Sivaprasad1Tomas Beno2Mahdi Eynian3Kjell Hjertig4Martin Magnevall5Mikael Lundblad6R&D Turning, Sandvik Coromant AB, 811 81 Sandviken, SwedenR&D, Sandvik Materials Technology AB, 811 81 Sandviken, SwedenDepartment of Engineering Science, University West, SE-461 32 Trollhättan, SwedenDepartment of Engineering Science, University West, SE-461 32 Trollhättan, SwedenDepartment of Engineering Science, University West, SE-461 32 Trollhättan, SwedenR&D, Sandvik Coromant AB, 811 81 Sandviken, SwedenR&D, Sandvik Coromant AB, 811 81 Sandviken, SwedenIn this study, the flow stress behavior of ferritic-pearlitic steel (C45E steel) is investigated through isothermal compression testing at different strain rates (1 s<sup>−1</sup>, 5 s<sup>−1</sup>, and 60 s<sup>−1</sup>) and temperatures ranging from 200 to 700 °C. The stress-strain curves obtained from experimental testing were post-processed to obtain true stress-true plastic strain curves. To fit the experimental data to well-known material models, Johnson-Cook (J-C) model was investigated and found to have a poor fit. Analysis of the flow stress as a function of temperature and strain rate showed that among other deformation mechanisms dynamic strain aging mechanism was active between the temperature range 200 and 400 °C for varying strain rates and J-C model is unable to capture this phenomenon. This lead to the need to modify the J-C model for the material under investigation. Therefore, the original J-C model parameters <i>A</i>, <i>B</i> and <i>n</i> are modified using the polynomial equation to capture its dependence on temperature and strain rate. The results show the ability of the modified J-C model to describe the flow behavior satisfactorily while dynamic strain aging was operative.https://www.mdpi.com/2075-4701/9/5/528flow stressmodified Johnson-Cook modeldynamic strain aging |
| spellingShingle | Ashwin Moris Devotta P. V. Sivaprasad Tomas Beno Mahdi Eynian Kjell Hjertig Martin Magnevall Mikael Lundblad A Modified Johnson-Cook Model for Ferritic-Pearlitic Steel in Dynamic Strain Aging Regime Metals flow stress modified Johnson-Cook model dynamic strain aging |
| title | A Modified Johnson-Cook Model for Ferritic-Pearlitic Steel in Dynamic Strain Aging Regime |
| title_full | A Modified Johnson-Cook Model for Ferritic-Pearlitic Steel in Dynamic Strain Aging Regime |
| title_fullStr | A Modified Johnson-Cook Model for Ferritic-Pearlitic Steel in Dynamic Strain Aging Regime |
| title_full_unstemmed | A Modified Johnson-Cook Model for Ferritic-Pearlitic Steel in Dynamic Strain Aging Regime |
| title_short | A Modified Johnson-Cook Model for Ferritic-Pearlitic Steel in Dynamic Strain Aging Regime |
| title_sort | modified johnson cook model for ferritic pearlitic steel in dynamic strain aging regime |
| topic | flow stress modified Johnson-Cook model dynamic strain aging |
| url | https://www.mdpi.com/2075-4701/9/5/528 |
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