自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 23    No. 12    December 2016

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Constitutive modeling of dynamic recrystallization behavior and processing map of Cr5 steel
LIU Xin-bin(刘新彬), WU Guang-liang(吴光亮), ZHOU Chao-yang(周超洋)

School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China

Abstract:The hot deformation behaviors of Cr5 steel were investigated. The hot compression tests were conducted in the temperature range of 900-1150 °C under strain rates of 0.01, 0.1 and 1 s-1. The constitutive equation and material constants (Q, n, α lnA) are obtained according to the hyperbolic sine function and Zener-Hollomon parameter. Besides, dynamic recrystallization (DRX) grain size model and critical strain model are acquired. The processing maps with the strain of 0.1, 0.3 and 0.5 are obtained on the basis of dynamic materials model. It has been observed that DRX occurs at high temperature and low strain rate. According to the processing map, the safety region exists in the temperature range of 920-1150 °C with strain rate of 0.01-0.20 s-1.

 

Key words: ?ow stress; constitutive equation; material constants; dynamic recrystallization; processing map

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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