A Strain-Compensated Constitutive Model for Describing the Hot Compressive Deformation Behaviors of an Aged Inconel 718 Superalloy
The hot deformation behaviors of an aged Inconel 718 superalloy are investigated by isothermal compression experiments at four strain rates and five deformation temperatures on a Gleeble-3500 thermo-mechanical simulator. The experimental results show that the true stresses are obviously affected by...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2019-02-01
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| Series: | High Temperature Materials and Processes |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/htmp-2018-0108 |
| _version_ | 1818358406023479296 |
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| author | Zhou Ying Chen Xiao-Min Qin Shengfeng |
| author_facet | Zhou Ying Chen Xiao-Min Qin Shengfeng |
| author_sort | Zhou Ying |
| collection | DOAJ |
| description | The hot deformation behaviors of an aged Inconel 718 superalloy are investigated by isothermal compression experiments at four strain rates and five deformation temperatures on a Gleeble-3500 thermo-mechanical simulator. The experimental results show that the true stresses are obviously affected by strain rate and deformation temperature. The true stress increases rapidly at the beginning of hot compressive deformation, which ascribes to the intense work hardening. The true stresses at high deformation temperatures are lower than those at lower deformation temperatures. The dynamic softening induced by DRX is weak at a relatively low deformation temperature. A strain-compensated Arrhenius-type constitutive equation linked with true stress, strain rate and deformation temperature is developed for the studied superalloy. The material constants (α\alpha , n, Q and A) in the developed model are expressed as the functions of true strain. The flow stresses calculated by the developed constitutive equation are nicely consistent with the experimental ones, which confirms that the developed constitutive equation can accurately describe the hot deformation behaviors of the studied superalloy. |
| first_indexed | 2024-12-13T20:28:29Z |
| format | Article |
| id | doaj.art-51a1e8be2006438cb1cb1bd5d5ab185e |
| institution | Directory Open Access Journal |
| issn | 0334-6455 2191-0324 |
| language | English |
| last_indexed | 2024-12-13T20:28:29Z |
| publishDate | 2019-02-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | High Temperature Materials and Processes |
| spelling | doaj.art-51a1e8be2006438cb1cb1bd5d5ab185e2022-12-21T23:32:29ZengDe GruyterHigh Temperature Materials and Processes0334-64552191-03242019-02-0138201943644310.1515/htmp-2018-0108A Strain-Compensated Constitutive Model for Describing the Hot Compressive Deformation Behaviors of an Aged Inconel 718 SuperalloyZhou Ying0Chen Xiao-Min1Qin Shengfeng2School of Mechanical and Electrical Engineering, Central South University, Changsha410083, ChinaSchool of Mechanical and Electrical Engineering, Central South University, Changsha410083, ChinaSchool of Design, Northumbria University, Newcastle upon TyneNE1 2SW, UKThe hot deformation behaviors of an aged Inconel 718 superalloy are investigated by isothermal compression experiments at four strain rates and five deformation temperatures on a Gleeble-3500 thermo-mechanical simulator. The experimental results show that the true stresses are obviously affected by strain rate and deformation temperature. The true stress increases rapidly at the beginning of hot compressive deformation, which ascribes to the intense work hardening. The true stresses at high deformation temperatures are lower than those at lower deformation temperatures. The dynamic softening induced by DRX is weak at a relatively low deformation temperature. A strain-compensated Arrhenius-type constitutive equation linked with true stress, strain rate and deformation temperature is developed for the studied superalloy. The material constants (α\alpha , n, Q and A) in the developed model are expressed as the functions of true strain. The flow stresses calculated by the developed constitutive equation are nicely consistent with the experimental ones, which confirms that the developed constitutive equation can accurately describe the hot deformation behaviors of the studied superalloy.https://doi.org/10.1515/htmp-2018-0108alloyconstitutive equationhot deformationflow stress |
| spellingShingle | Zhou Ying Chen Xiao-Min Qin Shengfeng A Strain-Compensated Constitutive Model for Describing the Hot Compressive Deformation Behaviors of an Aged Inconel 718 Superalloy High Temperature Materials and Processes alloy constitutive equation hot deformation flow stress |
| title | A Strain-Compensated Constitutive Model for Describing the Hot Compressive Deformation Behaviors of an Aged Inconel 718 Superalloy |
| title_full | A Strain-Compensated Constitutive Model for Describing the Hot Compressive Deformation Behaviors of an Aged Inconel 718 Superalloy |
| title_fullStr | A Strain-Compensated Constitutive Model for Describing the Hot Compressive Deformation Behaviors of an Aged Inconel 718 Superalloy |
| title_full_unstemmed | A Strain-Compensated Constitutive Model for Describing the Hot Compressive Deformation Behaviors of an Aged Inconel 718 Superalloy |
| title_short | A Strain-Compensated Constitutive Model for Describing the Hot Compressive Deformation Behaviors of an Aged Inconel 718 Superalloy |
| title_sort | strain compensated constitutive model for describing the hot compressive deformation behaviors of an aged inconel 718 superalloy |
| topic | alloy constitutive equation hot deformation flow stress |
| url | https://doi.org/10.1515/htmp-2018-0108 |
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