Single-step aging treatment for a precipitation-strengthened Ni-based alloy and its influence on high-temperature mechanical behavior
| Autor: | Peter F. Tortorelli, Ercan Cakmak, Xiahan Sang, Kinga A. Unocic, Dongwon Shin |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Precipitation (chemistry) Mechanical Engineering Alloy Metals and Alloys Single step 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Carbide Creep Mechanics of Materials 0103 physical sciences Ultimate tensile strength Thermal engineering General Materials Science Grain boundary Composite material 0210 nano-technology |
| Zdroj: | Scripta Materialia. 162:416-420 |
| ISSN: | 1359-6462 |
| Popis: | A simplified aging treatment yielded microstructural features in Ni-based alloy that produced strengthening behavior normally associated with more complex thermal processing. Specifically, a time series of 800 °C heat treatments was used to study the evolution of grain boundary carbides and γ' precipitates and the corresponding hardness, tensile strength, and creep resistance. These analyses and computational thermodynamic calculations revealed that a 4-hour aging treatment produced appropriately sized and uniformly distributed coherent γ' precipitates and the desired Cr-rich carbides like those formed during the conventional two-step heat treatment. Accordingly, the former heat treatment produced targeted typical strength levels for this alloy. |
| Databáze: | OpenAIRE |
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