Study on the thermal deformation behavior and microstructure of FGH96 heat extrusion alloy during two-pass hot deformation
| Autor: | Gaofeng Tian, Chengchang Jia, Shanwu Yang, Bin Fang, Meng-ya Wang, Zhen Ji |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Mechanical Engineering Alloy technology industry and agriculture 0211 other engineering and technologies Metals and Alloys Recrystallization (metallurgy) 02 engineering and technology engineering.material Strain rate 021001 nanoscience & nanotechnology Geochemistry and Petrology Mechanics of Materials Materials Chemistry engineering Dynamic recrystallization Extrusion Grain boundary Deformation (engineering) Composite material 0210 nano-technology Softening 021102 mining & metallurgy |
| Zdroj: | International Journal of Minerals, Metallurgy, and Materials. 26:657-663 |
| ISSN: | 1869-103X 1674-4799 |
| DOI: | 10.1007/s12613-019-1774-0 |
| Popis: | The change rules associated with hot deformation of FGH96 alloy were investigated by isothermal two-pass hot deformation tests in the temperature range 1050–1125°C and at strain rates ranging from 0.001 to 0.1 s−1 on a Gleeble 3500 thermo-simulation machine. The results showed that the softening degree of the alloy between passes decreases with increasing temperature and decreasing strain rates. The critical strain of the first-pass is greater than that of the second-pass. The true stress-true strain curves showed that single-peak dynamic recrystallization, multi- peak dynamic recrystallization, and dynamic response occur when the strain rate is 0.1, 0.01, and 0.001 s−1, respectively. The alloy contains three different grain structures after hot deformation: partially recrystallized tissue, completely fine recrystallized tissue, coarse-grained grains. The small-angle grain boundaries increase with increasing temperature. Increasing strain rates cause the small-angle grain boundaries to first increase and then decrease. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink