Journal
NPJ COMPUTATIONAL MATERIALS
Volume 6, Issue 1, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41524-020-0334-5
Keywords
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Funding
- National Key Research and Development Program of China [2016YFB0700505, 2017YFB0702902]
- Guangdong Province Key Area RD Program [2019B010940001]
- Scientific and Technological Innovation Foundation of Shunde Graduate School, USTB [BK19BE030]
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Designing a material with multiple desired properties is a great challenge, especially in a complex material system. Here, we propose a material design strategy to simultaneously optimize multiple targeted properties of multi-component Co-base superalloys via machine learning. The microstructural stability, gamma ' solvus temperature, gamma ' volume fraction, density, processing window, freezing range, and oxidation resistance were simultaneously optimized. A series of novel Co-base superalloys were successfully selected and experimentally synthesized from >210,000 candidates. The best performer, Co-36Ni-12Al-2Ti-4Ta-1W-2Cr, possesses the highest gamma ' solvus temperature of 1266.5 degrees C without the precipitation of any deleterious phases, a gamma ' volume fraction of 74.5% after aging for 1000 h at 1000 degrees C, a density of 8.68 g cm(-3) and good high-temperature oxidation resistance at 1000 degrees C due to the formation of a protective alumina layer. Our approach paves a new way to rapidly design multi-component materials with desired multi-performance functionality.
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