Quan, G.-Z., Yu, C.-T., Liu, Y.-Y., Xia, Y.-F., Zhou, J.
24485306400;55567723500;55936195300;36337963000;55493538900;
Characterization of dynamic rescrystallization behavior of 20MnNiMo steel by thermal deformation
(2013) Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment, 34 (8), pp. 177-183. 被引用 1 次。
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归属机构: School of Materials Science and Engineering, Chongqing University, Chongqing 400030, China
摘要: The true stress-strain curves of annealed 20MnNiMo steel at different temperatures and strain rates were obtained by isothermal compression tests on a Gleeble-1500 theromechanical simulator, which were taken as the basic data for characterizing the evolution of dynamic recrystallization (DRX). From the dσ/dε versus σcurves, the characteristic points including the critical strain for DRX initiation (εc), the strain for peak stress (εp), and the strain for maximum softening rate (ε*) were identified to express the evolution of DRX. By regression analysis for conventional hyperbolic sine equation, the activation energy Q was determined, and the flow stress constitutive equation was established. The regression analysis for a modified Avrami type equation by a dimensionless parameter Z/A was designed. The influence of deformation conditions on the evolution of DRX volume fraction was described in detail. The study of the effects of DRX on stress softening shows that at high strain rate, dramatic softening occurs in the late of strain, at medium strain rate, the stress is dramatic softening and then steady, and at low strain rate, there is a cycle of hardening and softening.
作者关键字: Critical strain;  Dynamic recrystallization;  Flow stress;  Strain hardening rate
索引关键字: Critical strains; Deformation conditions; Dimensionless parameters; Dynamic recrystallization (DRX); Hyperbolic sine equation; Isothermal compression tests; Strain hardening rate; True stress-strain curves, Activation energy; Compression testing; Deformation; Dynamic recrystallization; Plastic flow; Regression analysis; Strain hardening; Stress-strain curves, Strain rate
通讯地址: Quan, G.-Z.; School of Materials Science and Engineering, Chongqing University, Chongqing 400030, China; 电子邮件: quangz_2006@yahoo.com.cn
ISSN: 10096264
CODEN: JRXUD
原始文献语言: Chinese
来源出版物名称缩写: Cailiao Rechuli Xuebao
文献类型: Article
来源出版物: Scopus