A Yield Stress Model for a Solution-Treated Ni-Based Superalloy during Plastic Deformation
| Autor: | Yan-Xing Liu, Yong-Cheng Lin |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Technology
Materials science Alloy Chemicals: Manufacture use etc TP1-1185 02 engineering and technology engineering.material yield behavior 01 natural sciences alloy strengthening effect 0103 physical sciences General Materials Science Physical and Theoretical Chemistry Composite material 010302 applied physics dislocation Chemical technology TP200-248 alloying elements 021001 nanoscience & nanotechnology Condensed Matter Physics Superalloy Mechanics of Materials engineering Dislocation 0210 nano-technology |
| Zdroj: | High Temperature Materials and Processes, Vol 37, Iss 9-10, Pp 849-856 (2018) |
| ISSN: | 2191-0324 0334-6455 |
| Popis: | Up to now, there are few reports on the yield behavior of Ni-based superalloy during plastic deformation. However, an accurate yield stress model is significant for simulating the plastic forming process by cellular automaton or finite element methods. Therefore, the yield behavior of a solution-treated Ni-based superalloy is studied by hot compression tests. In order to evaluate yield stresses from the measured flow stress curves, the yield process is analyzed in terms of dislocation theory. Then, yield stresses at different deformation temperatures and strain rates are clearly determined. The experimental results show that the yield stresses are highly sensitive to deformation temperature and strain rate. The determined yield stress almost linearly increases with the increase of the logarithm of strain rate or the reciprocal of deformation temperature. A yield stress model is developed to correlate the yield behavior of the studied solution-treated Ni-based superalloy with deformation temperature, strain rate, and strengthening effect of alloying elements. The developed model can well describe the yield behavior of the studied solution-treated Ni-based superalloy. |
| Databáze: | OpenAIRE |
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