在Gleeble-1500D热模拟试验机上采用等温压缩试验研究了高锰奥氏体Fe-25Mn-3Si-3AlTWIP钢在变形温度为900～1100℃，变形速率为0．01～1s。条件下的热变形行为。研究结果表明，Fe-25Mn-3Si-3Al钢热变形流变应力曲线呈现明显的动态再结晶特征，出现了一个明显的流变应力峰值，峰值之后流变应力逐渐降低，呈现稳态流变。双曲正弦形式的Arrhenius方程可以较好地描述Fe-25Mn-3Si-3Al钢的热变形行为，通过线性回归分析计算出Fe-25Mn-3Si-3Al钢的热变形流变应力本构方程，得出试验钢的热变形激活能Qnw为432．95kJ／mol。
The hot deformation behaviors of Fe-25Mn-3Si-3Al TWIP steel were investigated by isothermal compression on Gleeble-1500D thermal simulator at the temperature range of 900 to 1 100℃ and the strain rate range of 0.01 to 1 s ^-1. The results show the true stress--strain curves of Fe-25Mn-3Si-3Al steel present a characteristic of dynamic recrystallization which often appears during the hot deformation process of metals and alloys with low stacking fault energies. In true stress-strain curves, a single peak stress is observed, which is followed by a steady-state stress. The hot compression deformation of Fe-25Mn-3Si-3Al steel can be represented by Arrhenius model. The constitutive equation of Fe-25Mn-3Si-3Al steel for hot compression deformation is calculated by a linear regression analysis. The activation energy for hot deformation of the experimental steel is 432.95 kJ/mol.
参考文献
| [1] | S. Vercammen;B. Blanpain;B. C. De Cooman .Cold rolling behaviour of an austenitic Fe-30Mn-3Al-3Si TWIP-steel: the importance of deformation twinning[J].Acta materialia,2004(7):2005-2012. |
| [2] | Barbier, D;Gey, N;Allain, S;Bozzolo, N;Humbert, M .Analysis of the tensile behavior of a TWIP steel based on the texture and microstructure evolutions[J].Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing,2009(1/2):196-206. |
| [3] | O.Bouaziz;S.Allain;C.Scott .Effect of grain and twin boundaries on the hardening mechanisms of twinning-induced plasticity steels[J].Scripta materialia,2008(6):484-487. |
| [4] | Graissel O;Kriiger L;Frommeyer G et al.High Strength Fe- Mn(AI,Si)TRIP/TWIP Steels Development,Properties,Application[J].International Journal of Plasticity,2000,16(10/11):1391. |
| [5] | 黎倩,熊荣刚,陈佳荣,符仁钰,李麟.TWIP钢的显微组织与变形机制研究[J].材料热处理学报,2008(02):52-55. |
| [6] | 牛济泰.材料和热加工领域的物理模拟技术[M].北京:国防工业出版社,2007 |
| [7] | N. CABANAS;N. AKDUT;J. PENNING .High-Temperature Deformation Properties of Austenitic Fe-Mn Alloys[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2006(11):3305-3315. |
| [8] | 刘晓艳,潘清林,何运斌,李文斌,梁文杰,尹志民.Al-Cu-Mg-Ag合金热压缩变形的流变应力行为和显微组织[J].中国有色金属学报,2009(02):201-207. |
| [9] | 林长青,梁高飞,方园,张小农,于艳.Fe16Mn0.6C TWIP钢流变应力和临界动态再结晶行为[J].钢铁研究学报,2009(12):43-48. |
| [10] | 李文斌,潘清林,梁文杰,何运斌,刘俊生,李运春.含Sc超高强Al-Zn-Cu-Mg-Sc-Zr合金的热压缩变形流变应力[J].中国有色金属学报,2008(05):777-782. |
| [11] | 李恒德.现代材料科学与工程辞典[M].济南:山东科学技术出版社,2002 |
| [12] | Hamada AS;Karjalainen LP;Somani MC .The influence of aluminum on hot deformation behavior and tensile properties of high-Mn TWIP steels[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(1-2):114-124. |
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