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| PLE/NPLE transition temperature in γ→α transformation of Fe-C-Xi alloy under hot deformation condition |
| ;;Zhaodong Li; |
| 清华大学 |
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Cite this article:
Zhaodong Li. PLE/NPLE transition temperature in γ→α transformation of Fe-C-Xi alloy under hot deformation condition. Acta Metall Sin, 2008, 44(6): 703-707 .
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Abstract In this research the PLE(Partition Local Equilibrium)/NPLE(Negligible Partition Local Equilibrium) model has been introduced into the deformed system to describe the γ→α transformation of Fe-C-Xi alloy(Xi represents for one or several substitutional elements such as Mn, Si, Cr, etc). Based on a calculate method in static system which has been reported, a thermodynamic equation which suits the plastic deformed system is established under the orthoequilibrium model, to calculate the PLE-NPLE critical temperature. Isothermal γ→α transformation experiments have been conducted to a Fe-C0.073-Mn2.17-Si0.80-Cr0.88(wt%) steel under different temperatures after a process of hot deformation at 820℃and the critical temperature of PLE-NPLE is roughly mensurated. The experimental results correspond well with the calculated results and both of them reveal that deformation does heighten the critical temperature of PLE-NPLE, as for the tested steel in this paper, after a 40% nominal deformation at 820℃ by deformed rate of 0.5s-1, the critical temperature of PLE-NPLE in isothermal γ→α transformation has been heighten by nearly 10℃.
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Received: 26 October 2007
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