Thermal-Mechanical Fatigue Behavior and Life Assessment of Single Crystal Nickel-Based Superalloy
Thermal-mechanical fatigue (TMF) tests and isothermal fatigue (IF) tests were conducted using thin-walled tubular specimens under strain-controlled conditions. The results of TMF tests showed a strong correlation between mechanical behavior and temperature cycling. Under different phases of temperat...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-05-01
|
| Series: | Crystals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4352/13/5/780 |
| _version_ | 1797600548222926848 |
|---|---|
| author | Juan Cao Fulei Jing Junjie Yang |
| author_facet | Juan Cao Fulei Jing Junjie Yang |
| author_sort | Juan Cao |
| collection | DOAJ |
| description | Thermal-mechanical fatigue (TMF) tests and isothermal fatigue (IF) tests were conducted using thin-walled tubular specimens under strain-controlled conditions. The results of TMF tests showed a strong correlation between mechanical behavior and temperature cycling. Under different phases of temperature and mechanical loading, the hysteresis loop and mean stress of the single crystal superalloy showed noticeable variations between the stress-controlled and strain-controlled conditions. In the strain-controlled TMF test, temperature cycling led to stress asymmetry and additional damage, resulting in a significantly lower TMF life compared to IF life at the maximum temperature. Moreover, the OP TMF life is generally lower than that of the IP TMF at the same strain amplitude. The Walker viscoplastic constitutive model based on slip systems was used to analyze the TMF mechanical behavior of the single crystal superalloy, and the change trends of the maximum Schmid stress, the maximum slip shear strain rate, and the slip shear strain range were analyzed, and their relationship with the TMF life was investigated. Finally, a TMF life prediction model independent of the loading mode and phase was constructed based on meso-mechanical damage parameters. The predicted TMF lives for different load control modes and phases fell within the twofold dispersion band. |
| first_indexed | 2024-03-11T03:49:40Z |
| format | Article |
| id | doaj.art-633a8ee3b9c94193a07deff1e5969c7b |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-11T03:49:40Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-633a8ee3b9c94193a07deff1e5969c7b2023-11-18T00:59:49ZengMDPI AGCrystals2073-43522023-05-0113578010.3390/cryst13050780Thermal-Mechanical Fatigue Behavior and Life Assessment of Single Crystal Nickel-Based SuperalloyJuan Cao0Fulei Jing1Junjie Yang2Aero Engine Corporation of China, Beijing 100097, ChinaAero Engine Academy of China, Aero Engine Corporation of China, Beijing 101304, ChinaInstitute for Aero Engine, Tsinghua University, Beijing 100084, ChinaThermal-mechanical fatigue (TMF) tests and isothermal fatigue (IF) tests were conducted using thin-walled tubular specimens under strain-controlled conditions. The results of TMF tests showed a strong correlation between mechanical behavior and temperature cycling. Under different phases of temperature and mechanical loading, the hysteresis loop and mean stress of the single crystal superalloy showed noticeable variations between the stress-controlled and strain-controlled conditions. In the strain-controlled TMF test, temperature cycling led to stress asymmetry and additional damage, resulting in a significantly lower TMF life compared to IF life at the maximum temperature. Moreover, the OP TMF life is generally lower than that of the IP TMF at the same strain amplitude. The Walker viscoplastic constitutive model based on slip systems was used to analyze the TMF mechanical behavior of the single crystal superalloy, and the change trends of the maximum Schmid stress, the maximum slip shear strain rate, and the slip shear strain range were analyzed, and their relationship with the TMF life was investigated. Finally, a TMF life prediction model independent of the loading mode and phase was constructed based on meso-mechanical damage parameters. The predicted TMF lives for different load control modes and phases fell within the twofold dispersion band.https://www.mdpi.com/2073-4352/13/5/780single crystal superalloythermal-mechanical fatiguestrain-controlledcyclic stress–strain relationshiplife assessmentmeso parameters |
| spellingShingle | Juan Cao Fulei Jing Junjie Yang Thermal-Mechanical Fatigue Behavior and Life Assessment of Single Crystal Nickel-Based Superalloy Crystals single crystal superalloy thermal-mechanical fatigue strain-controlled cyclic stress–strain relationship life assessment meso parameters |
| title | Thermal-Mechanical Fatigue Behavior and Life Assessment of Single Crystal Nickel-Based Superalloy |
| title_full | Thermal-Mechanical Fatigue Behavior and Life Assessment of Single Crystal Nickel-Based Superalloy |
| title_fullStr | Thermal-Mechanical Fatigue Behavior and Life Assessment of Single Crystal Nickel-Based Superalloy |
| title_full_unstemmed | Thermal-Mechanical Fatigue Behavior and Life Assessment of Single Crystal Nickel-Based Superalloy |
| title_short | Thermal-Mechanical Fatigue Behavior and Life Assessment of Single Crystal Nickel-Based Superalloy |
| title_sort | thermal mechanical fatigue behavior and life assessment of single crystal nickel based superalloy |
| topic | single crystal superalloy thermal-mechanical fatigue strain-controlled cyclic stress–strain relationship life assessment meso parameters |
| url | https://www.mdpi.com/2073-4352/13/5/780 |
| work_keys_str_mv | AT juancao thermalmechanicalfatiguebehaviorandlifeassessmentofsinglecrystalnickelbasedsuperalloy AT fuleijing thermalmechanicalfatiguebehaviorandlifeassessmentofsinglecrystalnickelbasedsuperalloy AT junjieyang thermalmechanicalfatiguebehaviorandlifeassessmentofsinglecrystalnickelbasedsuperalloy |