Creep-fatigue life prediction in nickel-based superalloy GH4169 based on microstructural damage quantification with the help of electron backscatter diffraction
A series of strain-controlled creep-fatigue tests under different loading waveforms are carried out on GH4169 superalloy at 650 °C. In the macroscopic view, a unified viscoplastic constitutive framework is used to describe cyclic deformation process. Particularly, a modified kinematic hardening rule...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-10-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127520304731 |
| _version_ | 1818152800832454656 |
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| author | Run-Zi Wang Hao Chen Yang Zhang Xian-Cheng Zhang Shan-Tung Tu |
| author_facet | Run-Zi Wang Hao Chen Yang Zhang Xian-Cheng Zhang Shan-Tung Tu |
| author_sort | Run-Zi Wang |
| collection | DOAJ |
| description | A series of strain-controlled creep-fatigue tests under different loading waveforms are carried out on GH4169 superalloy at 650 °C. In the macroscopic view, a unified viscoplastic constitutive framework is used to describe cyclic deformation process. Particularly, a modified kinematic hardening rule considering loading-dependent effect is developed to simulate the stress relaxation behavior during hold periods. Then, creep-fatigue assessment based on interaction diagram is quantitatively determined by the strain energy density exhaustion (SEDE) approach. In order to elucidate damage mechanisms under various loading conditions, the characterization of damage mechanism is observed from the post-test examination. Main-crack-failure modes from fracture appearance observations and cracking modes from longitudinal sections are studied via scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD), respectively. Furthermore, image-based creep-fatigue diagram is proposed based on metallographic interpretation of mechanisms. |
| first_indexed | 2024-12-11T14:00:29Z |
| format | Article |
| id | doaj.art-6853b2d4c25044bfb048108e7a7b250b |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-12-11T14:00:29Z |
| publishDate | 2020-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-6853b2d4c25044bfb048108e7a7b250b2022-12-22T01:03:53ZengElsevierMaterials & Design0264-12752020-10-01195108939Creep-fatigue life prediction in nickel-based superalloy GH4169 based on microstructural damage quantification with the help of electron backscatter diffractionRun-Zi Wang0Hao Chen1Yang Zhang2Xian-Cheng Zhang3Shan-Tung Tu4Key Laboratory of Pressure Systems and Safety, Ministry of Education, East China University of Science and Technology, Shanghai 200237, PR ChinaKey Laboratory of Pressure Systems and Safety, Ministry of Education, East China University of Science and Technology, Shanghai 200237, PR ChinaEnergy and Environment Engineering Institute, Nanchang Institute of Technology, Nanchang 330013, PR ChinaKey Laboratory of Pressure Systems and Safety, Ministry of Education, East China University of Science and Technology, Shanghai 200237, PR China; Corresponding authors at: Key Laboratory of Pressure Systems and Safety, Ministry of Education, School of Mechanical and Power Engineering, East China University of Science and Technology, Meilong Road 130, Xuhui District, Shanghai 200237, PR China.Key Laboratory of Pressure Systems and Safety, Ministry of Education, East China University of Science and Technology, Shanghai 200237, PR China; Corresponding authors at: Key Laboratory of Pressure Systems and Safety, Ministry of Education, School of Mechanical and Power Engineering, East China University of Science and Technology, Meilong Road 130, Xuhui District, Shanghai 200237, PR China.A series of strain-controlled creep-fatigue tests under different loading waveforms are carried out on GH4169 superalloy at 650 °C. In the macroscopic view, a unified viscoplastic constitutive framework is used to describe cyclic deformation process. Particularly, a modified kinematic hardening rule considering loading-dependent effect is developed to simulate the stress relaxation behavior during hold periods. Then, creep-fatigue assessment based on interaction diagram is quantitatively determined by the strain energy density exhaustion (SEDE) approach. In order to elucidate damage mechanisms under various loading conditions, the characterization of damage mechanism is observed from the post-test examination. Main-crack-failure modes from fracture appearance observations and cracking modes from longitudinal sections are studied via scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD), respectively. Furthermore, image-based creep-fatigue diagram is proposed based on metallographic interpretation of mechanisms.http://www.sciencedirect.com/science/article/pii/S0264127520304731Creep-fatigueDamage mechanismUnified viscoplastic modelInteraction diagramLife assessment |
| spellingShingle | Run-Zi Wang Hao Chen Yang Zhang Xian-Cheng Zhang Shan-Tung Tu Creep-fatigue life prediction in nickel-based superalloy GH4169 based on microstructural damage quantification with the help of electron backscatter diffraction Materials & Design Creep-fatigue Damage mechanism Unified viscoplastic model Interaction diagram Life assessment |
| title | Creep-fatigue life prediction in nickel-based superalloy GH4169 based on microstructural damage quantification with the help of electron backscatter diffraction |
| title_full | Creep-fatigue life prediction in nickel-based superalloy GH4169 based on microstructural damage quantification with the help of electron backscatter diffraction |
| title_fullStr | Creep-fatigue life prediction in nickel-based superalloy GH4169 based on microstructural damage quantification with the help of electron backscatter diffraction |
| title_full_unstemmed | Creep-fatigue life prediction in nickel-based superalloy GH4169 based on microstructural damage quantification with the help of electron backscatter diffraction |
| title_short | Creep-fatigue life prediction in nickel-based superalloy GH4169 based on microstructural damage quantification with the help of electron backscatter diffraction |
| title_sort | creep fatigue life prediction in nickel based superalloy gh4169 based on microstructural damage quantification with the help of electron backscatter diffraction |
| topic | Creep-fatigue Damage mechanism Unified viscoplastic model Interaction diagram Life assessment |
| url | http://www.sciencedirect.com/science/article/pii/S0264127520304731 |
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