Acta Metallurgica Sinica (English Letters) ›› 2018, Vol. 31 ›› Issue (9): 963-974.DOI: 10.1007/s40195-018-0729-1
Special Issue: 2018年钢铁材料专辑
• Orginal Article • Previous Articles Next Articles
Received:
2017-11-21
Revised:
2018-01-26
Online:
2018-09-10
Published:
2018-09-29
Chuan Wu, Shuang Han. Hot Deformation Behavior and Dynamic Recrystallization Characteristics in a Low-Alloy High-Strength Ni-Cr-Mo-V Steel[J]. Acta Metallurgica Sinica (English Letters), 2018, 31(9): 963-974.
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Fig. 2 Stress-strain curves of steel at strain rates from 0.01 to 10 s-1 and temperatures of a 800 °C, b 900 °C, c 1000 °C, d 1100 °C, e 1200 °C, f softening extent.
Temperature (°C) | 0.01 s-1 | 0.1 s-1 | 1 s-1 | 10 s-1 |
---|---|---|---|---|
900 | 121.0/0.44 | 169.0/0.69 | 197.0/0.77 | - |
1000 | 76.4/0.22 | 116.0/0.43 | 152.0/0.71 | - |
1100 | 55.0/0.17 | 75.6/0.29 | 110.0/0.40 | - |
1200 | 40.0/0.12 | 55.0/0.20 | 75.0/0.33 | - |
Table 1 Peak stresses and peak strains (σp/εp) at different conditions
Temperature (°C) | 0.01 s-1 | 0.1 s-1 | 1 s-1 | 10 s-1 |
---|---|---|---|---|
900 | 121.0/0.44 | 169.0/0.69 | 197.0/0.77 | - |
1000 | 76.4/0.22 | 116.0/0.43 | 152.0/0.71 | - |
1100 | 55.0/0.17 | 75.6/0.29 | 110.0/0.40 | - |
1200 | 40.0/0.12 | 55.0/0.20 | 75.0/0.33 | - |
Fig. 11 Microstructural evolution of steel at temperatures of a-c 800 °C, d-f 1000 °C, g-i 1200 °C and strain rates of a, d, g 0.01 s-1, b, e, h 0.1 s-1, c, f, i 1 s-1.
Fig. 12 Curves of θ-σ (a-c) and $\left( {{{ - \partial \theta } \mathord{\left/ {\vphantom {{ - \partial \theta } {\partial \sigma }}} \right. \kern-0pt} {\partial \sigma }}} \right) - \sigma$ (d-f) at strain rates of a, d 0.01 s-1, b, e 0.1 s-1, c, f 1 s-1.
Temperature (°C) | 0.01 s-1 | 0.1 s-1 | 1 s-1 | 10 s-1 |
---|---|---|---|---|
900 | 80.0/0.07 | - | - | - |
1000 | 60.1/0.10 | 93.5/0.14 | - | - |
1100 | 47.8/0.09 | 63.0/0.11 | 94.6/0.20 | - |
1200 | 34.8/0.06 | 40.0/0.06 | 66.0/0.16 | - |
Table 2 Values of critical strain and stress (σc/εc) under different deformation conditions
Temperature (°C) | 0.01 s-1 | 0.1 s-1 | 1 s-1 | 10 s-1 |
---|---|---|---|---|
900 | 80.0/0.07 | - | - | - |
1000 | 60.1/0.10 | 93.5/0.14 | - | - |
1100 | 47.8/0.09 | 63.0/0.11 | 94.6/0.20 | - |
1200 | 34.8/0.06 | 40.0/0.06 | 66.0/0.16 | - |
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