Microstructural Evolution and Tensile Properties of a Corrosion-Resistant Ni-Based Superalloys Used for Industrial Gas Turbines
| Autor: | Zhenhuan Gao, Shikun Li, Gang Liu, Zhao Shang, Dazhuo Song, Gongxian Yang, Juntao Zou, Shuhua Liang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Crystals, Vol 13, Iss 4, p 669 (2023) |
| Druh dokumentu: | article |
| ISSN: | 13040669 2073-4352 |
| DOI: | 10.3390/cryst13040669 |
| Popis: | As an important mechanical property, tensile behavior has been regarded as an indicator for the creep and thermal mechanical fatigue properties of Ni-based superalloys. The tensile property of Ni-based superalloys is closely related to the amount, size, and distribution of γ′-phase and carbides. To further clarify the tensile deformation mechanism of the CM247LC alloy, this study investigated its solidification characteristics and directionally-solidified and heat-treated microstructure. The dependence of tensile properties on the varied temperature ranging between 650 and 950 °C is discussed in detail. It was found that the deformation mechanism at 650 °C is dominated by the shearing of dislocations into the γ′-precipitates to form the superlattice stacking faults. At 800 °C, the K-W lock leads to the anomalous yield effects. At 950 °C, the deformation mechanism is dominated by the dislocations bypassing the γ′-precipiates. The results provide a comprehensive understanding of the CM247LC alloy and are beneficial for the development of corrosion-resistant Ni-based superalloys. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|