Effect of Nb on the dynamic recrystallization behavior of high-grade pipeline steels

The dynamic recrystallization （DRX） behavior of high-grade X80/X100 pipeline steels with different Nb contents was investi- gated through single pass compression experiment using a Gleeble 1500 thermomechanical simulator. By the regression of stress-sWain data obtained in the experiment, the deforma...

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Bibliographic Details
Published in:International journal of minerals, metallurgy and materials metallurgy and materials, 2010-12, Vol.17 (6), p.742-747
Main Authors: Niu, Tao, Kang, Yong-lin, Gu, Hong-wei, Yin, Yu-qun, Qiao, Ming-liang, Jiang, Jin-xing
Format: Article
Language:English
Subjects:
Activation energy
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Composites
Corrosion and Coatings
Dynamic recrystallization
Empirical analysis
Glass
High strength low alloy steels
Materials Science
Mathematical analysis
Metallic Materials
Natural Materials
Niobium
Pipelines
Steels
Strain
Structural steels
Surfaces and Interfaces
Thermal simulators
Thin Films
Tribology
临界应变
再结晶动力学
再结晶激活能
再结晶行为
动态再结晶
压缩实验
高钢级管线钢
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Summary:The dynamic recrystallization （DRX） behavior of high-grade X80/X100 pipeline steels with different Nb contents was investi- gated through single pass compression experiment using a Gleeble 1500 thermomechanical simulator. By the regression of stress-sWain data obtained in the experiment, the deformation activation energy of DRX was identified, and the critical strain was calculated with the Po- liak-Jonas （P-J） method. Based on the analysis, the occurrence condition and kinetics of DRX were determined. The results show that as the Nb content increases from 0.08wt% to 0.095wt%, the activation energy of recrystallization raises from 365 to 395 kJ/mol. The critical swain of DRX can be determined more accurately by the P-J method, and the ratios of critical swain to peak sWain of XS0 and X100 pipeline steels are 0.51 and 0.49, respectively, which are similar to the results achieved by other researchers and calculated with empirical formulae.
ISSN:1674-4799
1869-103X
DOI:10.1007/s12613-010-0383-8