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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2006, Vol. 7 Issue (8): 1453-1460    DOI: 10.1631/jzus.2006.A1453
Materials Science & Engineering     
Investigation on Zener-Hollomon parameter in the warm-hot deformation behavior of 20CrMnTi
YANG Hui, LI Zhen-hong, ZHANG Zhi-liang
Department of Plasticity Technology, Shanghai Jiao Tong University, Shanghai 200030, China
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Abstract  The warm-hot deformation behavior of 20CrMnTi steel was studied with hot compression tests at temperature range of 1123~1273 K and strain rate of 0.1~20 s−1. The activation energy for warm-hot deformation is 426.064 KJ/mol. The influences of Zener-Hollomon parameter, strain and grain size imposing on the flow stress were analyzed in the temperature range of warm-hot forging. Creep theory and mathematical theory of statistics were used to obtain mathematical models of flow stress. The research and results provide scientific basis for controlling microstructure of forging process through Zener-Hollomon parameter.

Key words： Zener-Hollomon parameter      Warm-hot deformation      20CrMnTi      Grain size     
Received: 24 November 2005     
CLC:  TG312  
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YANG Hui
LI Zhen-hong
ZHANG Zhi-liang
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YANG Hui, LI Zhen-hong, ZHANG Zhi-liang. Investigation on Zener-Hollomon parameter in the warm-hot deformation behavior of 20CrMnTi. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2006, 7(8): 1453-1460.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2006.A1453     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2006/V7/I8/1453

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