Effects of Boron and Zirconium on Grain Boundary Morphology and Creep Resistance in Nickel-Based Superalloy
| Autor: | Cheon-Ha Han, Young-Jig Kim, Yong-Kwan Shin, Jeong-Il Youn, Byung-Il Kang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Zirconium Materials science Mechanical Engineering Metallurgy chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Carbide Superalloy Nickel chemistry Creep Mechanics of Materials 0103 physical sciences General Materials Science Grain boundary 0210 nano-technology Boron |
| Zdroj: | Journal of Materials Engineering and Performance. 28:7025-7035 |
| ISSN: | 1544-1024 1059-9495 |
| DOI: | 10.1007/s11665-019-04419-y |
| Popis: | Grain boundaries (GBs) in nickel-based superalloys have a significant influence on the creep resistance of these alloys. In this study, the trace elements of boron and zirconium were added to the newly designed LESS 1 (Ni-22Cr-20Co-2W-2Nb-1.5Al-1.5Ti-0.03C) alloy, and their effects on the GB precipitation behaviors of carbides were observed. The combined addition of boron and zirconium generates a continuous film structure containing MC carbides and M23(C, B)6-type boro-carbides, as well as a grain boundary γ′. Based on the change in microstructure, rupture time is significantly increased. According to the observed microstructures and simulation results, it was confirmed that boron forms M23(C, B)6-type boro-carbides and zirconium appears to stabilize MC carbides at GBs. |
| Databáze: | OpenAIRE |
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