Experimental study and numerical simulation of dynamic recrystallization for a FGH96 superalloy during isothermal compression
Hot compression tests of a FGH96 superalloy under the conditions of temperatures from 1020 to 1110 °C and strain rates from 10−3 to 1 s−1 were carried out on a Gleeble-3180D thermo simulator. The microstructure evolution and nucleation mechanisms of dynamic recrystallization (DRX) for the superalloy...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S223878542030096X |
| _version_ | 1818459211955175424 |
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| author | Hong Wu Minxue Liu Yan Wang Zhengqin Huang Gang Tan Lei Yang |
| author_facet | Hong Wu Minxue Liu Yan Wang Zhengqin Huang Gang Tan Lei Yang |
| author_sort | Hong Wu |
| collection | DOAJ |
| description | Hot compression tests of a FGH96 superalloy under the conditions of temperatures from 1020 to 1110 °C and strain rates from 10−3 to 1 s−1 were carried out on a Gleeble-3180D thermo simulator. The microstructure evolution and nucleation mechanisms of dynamic recrystallization (DRX) for the superalloy were analyzed by electron backscatter diffraction (EBSD) technique and transmission electron microscope (TEM). A DEFORM-3D Finite Element (FE) software was used to simulate the distributions of deformation and microstructures of the compressed specimens. The results show that the flow stress curves of FGH96 superalloy exhibit typical features of dynamic recrystallization (DRX). The constitutive equation is established based on the friction-corrected flow stress data. Increasing temperature or decreasing strain rate is found to result in the increases of both the DRX fraction and the grain size. The nucleation mechanisms of DRX for the superalloy mainly include dominant discontinuous dynamic recrystallization (DDRX) and assisting nucleation by twins. The prediction models of DRX, which are expressed as a function of Z parameter, are obtained on the basis of the compression data and quantitatively microstructural characterization. By comparing the simulated results with that of the experiment, the accuracy of the developed DRX models is validated. |
| first_indexed | 2024-12-14T23:10:45Z |
| format | Article |
| id | doaj.art-c41287fce30f4898811817393e6dfb8b |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-14T23:10:45Z |
| publishDate | 2020-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-c41287fce30f4898811817393e6dfb8b2022-12-21T22:44:12ZengElsevierJournal of Materials Research and Technology2238-78542020-05-019350905104Experimental study and numerical simulation of dynamic recrystallization for a FGH96 superalloy during isothermal compressionHong Wu0Minxue Liu1Yan Wang2Zhengqin Huang3Gang Tan4Lei Yang5State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaSchool of Aeronautics and Astronautics, Central South University, Changsha 410083, China; Corresponding author.School of Aeronautics and Astronautics, Central South University, Changsha 410083, ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, ChinaHot compression tests of a FGH96 superalloy under the conditions of temperatures from 1020 to 1110 °C and strain rates from 10−3 to 1 s−1 were carried out on a Gleeble-3180D thermo simulator. The microstructure evolution and nucleation mechanisms of dynamic recrystallization (DRX) for the superalloy were analyzed by electron backscatter diffraction (EBSD) technique and transmission electron microscope (TEM). A DEFORM-3D Finite Element (FE) software was used to simulate the distributions of deformation and microstructures of the compressed specimens. The results show that the flow stress curves of FGH96 superalloy exhibit typical features of dynamic recrystallization (DRX). The constitutive equation is established based on the friction-corrected flow stress data. Increasing temperature or decreasing strain rate is found to result in the increases of both the DRX fraction and the grain size. The nucleation mechanisms of DRX for the superalloy mainly include dominant discontinuous dynamic recrystallization (DDRX) and assisting nucleation by twins. The prediction models of DRX, which are expressed as a function of Z parameter, are obtained on the basis of the compression data and quantitatively microstructural characterization. By comparing the simulated results with that of the experiment, the accuracy of the developed DRX models is validated.http://www.sciencedirect.com/science/article/pii/S223878542030096XNickel-base superalloyDynamic recrystallizationHot compressionNucleationFinite element (FE) simulation |
| spellingShingle | Hong Wu Minxue Liu Yan Wang Zhengqin Huang Gang Tan Lei Yang Experimental study and numerical simulation of dynamic recrystallization for a FGH96 superalloy during isothermal compression Journal of Materials Research and Technology Nickel-base superalloy Dynamic recrystallization Hot compression Nucleation Finite element (FE) simulation |
| title | Experimental study and numerical simulation of dynamic recrystallization for a FGH96 superalloy during isothermal compression |
| title_full | Experimental study and numerical simulation of dynamic recrystallization for a FGH96 superalloy during isothermal compression |
| title_fullStr | Experimental study and numerical simulation of dynamic recrystallization for a FGH96 superalloy during isothermal compression |
| title_full_unstemmed | Experimental study and numerical simulation of dynamic recrystallization for a FGH96 superalloy during isothermal compression |
| title_short | Experimental study and numerical simulation of dynamic recrystallization for a FGH96 superalloy during isothermal compression |
| title_sort | experimental study and numerical simulation of dynamic recrystallization for a fgh96 superalloy during isothermal compression |
| topic | Nickel-base superalloy Dynamic recrystallization Hot compression Nucleation Finite element (FE) simulation |
| url | http://www.sciencedirect.com/science/article/pii/S223878542030096X |
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