Prediction of critical conditions for dynamic recrystallization in 316LN austenitic steel
| Autor: | Xingang Liu, Miao Jin, Lei Chen, Bao-feng Guo, Rong-sheng Qi, Li-ge Zhang |
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| Rok vydání: | 2016 |
| Předmět: |
Austenite
Materials science Strain (chemistry) Metallurgy Metals and Alloys 02 engineering and technology Strain hardening exponent engineering.material Flow stress 021001 nanoscience & nanotechnology Microstructure 020501 mining & metallurgy 0205 materials engineering Mechanics of Materials Materials Chemistry engineering Dynamic recrystallization Austenitic stainless steel Deformation (engineering) Composite material 0210 nano-technology |
| Zdroj: | Journal of Iron and Steel Research International. 23:238-243 |
| ISSN: | 2210-3988 1006-706X |
| DOI: | 10.1016/s1006-706x(16)30040-1 |
| Popis: | Hot compression experiments conducted on a Gleeble-3500 thermo-mechanical simulator and metallographic observation tests were employed to study the critical conditions of dynamic recrystallization (DRX) of 316LN austenitic stainless steel. The true stress-true strain curves of 316LN were obtained at deformation temperatures ranging from 900 °C to 1200 °C and strain rates ranging from 0.001 s–1 to 10 s–1. Based on the above tests, the critical conditions of DRX were determined and compared with those obtained from work-hardening theory and the Cingara-McQueen flow stress model. Furthermore, the microstructure was observed to validate the calculated results. The ratio of critical strain to peak strain (ec/ep) for 316LN was determined, and the quantitative relationship between the critical strain and the deformation parameters of 316LN was elucidated. The results demonstrated that the onset of DRX corresponds to the constant normalized strain hardening rate (Γ), namely, the critical strain hardening rate Γc for 316LN is equal to 0.65. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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