Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 20    No. 3    March 2010

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Identification of nucleation parameter for cellular automaton model of
dynamic recrystallization
JIN Zhao-yang(金朝阳)1, 2, LIU Juan(刘 娟)1, CUI Zhen-shan(崔振山)1, WEI Dong-lai(韦东来)1

1. National Die and Mold CAD Engineering Research Center,
Shanghai Jiao Tong University, Shanghai 200030, China;
2. School of Mechanical Engineering, Yangzhou University, Yangzhou 225001, China

Abstract:The accuracy of nucleation parameter is a critical factor in the simulation of microstructural evolution during dynamic recrystallization (DRX). Based on the flow stress curve under hot deformation conditions, a new approach is proposed to identify the nucleation parameter during DRX. In this approach, a cellular automaton (CA) model is applied to quantitatively simulate the microstructural evolution and flow stress during hot deformation; and adaptive response surface method (ARSM) is applied as optimization model to provide input parameters to CA model and evaluate the outputs of the latter. By taking an oxygen-free high-conductivity (OFHC) copper as an example, the good agreement between the simulation results and the experimental observations demonstrates the availability of the proposed method.

 

Key words: dynamic recrystallization; cellular automaton method; response surface method; nucleation rate; parameter identification

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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