Acta Metallurgica Sinica (English Letters) ›› 2018, Vol. 31 ›› Issue (2): 208-215.DOI: 10.1007/s40195-017-0595-2
• Orginal Article • Previous Articles Next Articles
Jun Zhang1,2, Cheng-Wu Zheng2(), Dian-Zhong Li2
Received:
2017-05-24
Revised:
2017-05-24
Online:
2018-02-20
Published:
2018-03-20
About author:
About author:Lin Lv and Feng-Qing Wang have contributed equally to this work.
Jun Zhang, Cheng-Wu Zheng, Dian-Zhong Li. A Multi-phase Field Model for Static Recrystallization of Hot Deformed Austenite in a C-Mn Steel[J]. Acta Metallurgica Sinica (English Letters), 2018, 31(2): 208-215.
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n 1 | n 2 | A | B | Q def (kJ mol-1) |
---|---|---|---|---|
0.45 | 0.1 | 48 | 30 | 22 |
Table 1 Values of the fitting parameters for σ prediction
n 1 | n 2 | A | B | Q def (kJ mol-1) |
---|---|---|---|---|
0.45 | 0.1 | 48 | 30 | 22 |
Fig. 2 Flow stresses as functions of strain during hot rolling at T = 900 °C and \(\dot{\varepsilon }\) = 1.0 s-1 for C-Mn steels. The model prediction compares with experimental measurements
G (GPa) | b (m) | Q m (kJ mol-1) | σ gb (J m-2) | D 0 (m2 s-1) | Q a (kJ mol-1) |
---|---|---|---|---|---|
80 | 2.48 × 10-10 | 140 | 0.56 | 1.1 × 10-13 | 170 |
Table 2 Key parameters used in simulations [16]
G (GPa) | b (m) | Q m (kJ mol-1) | σ gb (J m-2) | D 0 (m2 s-1) | Q a (kJ mol-1) |
---|---|---|---|---|---|
80 | 2.48 × 10-10 | 140 | 0.56 | 1.1 × 10-13 | 170 |
Fig. 4 Increase in grain boundary area with increasing strain ?. S 0 is the original grain boundary area and S d is the grain boundary area after deformation
Fig. 5 Simulated microstructural evolution during the austenite SRX after hot deformation under different pre-strains of a ε = 0.2, b ε = 0.3, c ε = 0.4, d ε = 0.5
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