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材料工程  2007 

45钢高温拉伸峰值应力和变形储能与Z参数的关系函数研究

, PP. 21-25

Keywords: 峰值应力,关系函数,Zener-Hollomon参数,变形储能

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Abstract:

通过Gleeble-1500D热模拟试验机进行高温拉伸实验,变形温度范围1123~1273K,初始应变速率范围0.01~5s-1,并采用双曲正弦模型,研究了45钢在高温拉伸条件下的峰值应力、变形储能与Zener-Hollomon参数的关系函数。结果表明峰值应力与Z参数之间能较好地满足双曲正弦关系,其激活能为336.0kJ/mol;同时,变形储能与Z参数满足ΔGD=0.1269(lnZ)2-6.8262(lnZ)+93.873函数关系,且随着应变速率的增加和变形温度的下降而上升,其值在2~20J/mol之间波动。

References

[1]  JOHNSON G R,COOK W H.A constitutive model and data for metals subjected to large strain,high strain rates and high temperatures[A].Proceedings of the 7th International Symposium on Ballistics[C].The Hague,Netherlands:International Ballistics Committee,1983.541-547.
[2]  ZUZIN W I,BROWMAN M YA,MELIKOV A F.Flow resistance of steel at hot forming[M].Moscow:Metallurgy,1964.
[3]  MCQUEEN H J,YUE S,RYAN N D,et al.Hot working characteristics of steels in austenitic state[J].Journal of Materials Processing Technology,1995,53(1-2):293-310.
[4]  AKHTAR S K,LIANG R Q.Behaviors of three BCC metal over a wide range of strain rates and temperatures:experiments and modeling[J].International Journal of Plasticity,1999,(15):1089-1109.
[5]  TAKUDA H,FUJIMOTO H,HATTA N.Modelling on flow stress of Mg-Al-Zn alloys at elevated temperatures[J].Journal of Materials Processing Technology,1998,(80-81):513-516.
[6]  翁宇庆等著.超细晶钢-钢的组织细化理论与控制技术[M].北京:冶金工业出版社,2003.118-133.
[7]  王瑜,林栋樑,CHIC LAW.TiAl合金高温拉伸流变应力与Zener-Hollomon因子的关系函数[J].上海交通大学学报,2000,34(3):338-341,346.
[8]  董瀚,孙新军,刘清友,等.变形诱导铁素体相变-现象与理论[J].钢铁,2003,38(10):56-67,55.

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