Predicting creep rupture life of Ni-based single crystal superalloys using divide-and-conquer approach based machine learning
| Autor: | Siqi Shi, Xiao-Gang Lu, Maxim Avdeev, Chong-Yu Wang, Junming Wu, Zhichao Wang, Tao Yu, Yue Liu |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Polymers and Plastics business.industry Metals and Alloys 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure Machine learning computer.software_genre 01 natural sciences Electronic Optical and Magnetic Materials Stress (mechanics) Shear modulus Superalloy Creep Stacking-fault energy 0103 physical sciences Service life Ceramics and Composites Artificial intelligence 0210 nano-technology business computer CALPHAD |
| Zdroj: | Acta Materialia. 195:454-467 |
| ISSN: | 1359-6454 |
| DOI: | 10.1016/j.actamat.2020.05.001 |
| Popis: | Creep rupture life is a key material parameter for service life and mechanical properties of Ni-based single crystal superalloy materials. Therefore, it is of much practical significance to accurately and efficiently predict creep life. Here, we develop a divide-and-conquer self-adaptive (DCSA) learning method incorporating multiple material descriptors for rational and accelerated prediction of the creep rupture life. We characterize a high-quality creep dataset of 266 alloy samples with such features as alloy composition, test temperature, test stress, and heat treatment process. In addition, five microstructural parameters related to creep process, including stacking fault energy, lattice parameter, mole fraction of the γ' phase, diffusion coefficient and shear modulus, are calculated and introduced by the CALPHAD (CALculation of PHAse Diagrams) method and basic materials structure-property relationships, that enables us to reveal the effect of microstructure on creep properties. The machine learning explorations conducted on the creep dataset demonstrate the potential of the approach to achieve higher prediction accuracy with RMSE, MAPE and R2 of 0.3839, 0.0003 and 0.9176 than five alternative state-of-the-art machine learning models. On the newly collected 8 alloy samples, the error between the predicted creep life value and the experimental measured value is within the acceptable range (6.4486 h–40.7159 h), further confirming the validity of our DCSA model. Essentially, our method can establish accurate structure-property relationship mapping for the creep rupture life in a faster and cheaper manner than experiments and is expected to serve for inverse design of alloys. |
| Databáze: | OpenAIRE |
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