Journal ArticleDOI
Role of Precipitates in Recrystallization Mechanisms of Nb-Mo Microalloyed Steel
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TLDR
In this article, the influence of hot deformation conditions on the flow behavior and the effect of alloying elements, Nb in particular, on austenite recrystallization kinetics is highlighted.Abstract:
Recrystallization behavior of a Nb-Mo microalloyed steel has been investigated using double-hit compression tests. A suitable reheating temperature and soaking time were established for the complete dissolution of the microalloying precipitates prior to hot deformation. The influence of hot deformation conditions on the flow behavior and the effect of alloying elements, Nb in particular, on austenite recrystallization kinetics are highlighted. The strain-induced precipitation has been found to play an important role in hindering recrystallization kinetics. Post-deformation microstructural analysis indicates that strain-induced grain boundary migration (SIMB) is one of the mechanisms for the formation of recrystallized grains. Retardation of recrystallization has been explained by estimating pinning force of Nb(C, N) precipitates and recrystallization driving force at 1000 °C, which is in good agreement with the experimental observations in the present study as well as other reported data. The study brings out a better understanding on the influence of strain-induced precipitates on recrystallization behavior.read more
Citations
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Journal ArticleDOI
Experimental and theoretical study on static recrystallization of a low-density ferritic steel containing 4 mass% aluminum
Xiangyu Xu,Jianzhe Li,Weijie Li,Qiannan Liu,Dan Liu,Xuemin Wang,Jingliang Wang,Chengjia Shang,R.D.K. Misra +8 more
TL;DR: In this paper, the static recrystallization behavior of a low-density δ-ferritic steel containing 4 1/5% Al was investigated by means of hot compression tests.
Effects of contents of Nb and C on hot deformation behaviors of high Nb X80 pipeline steels
TL;DR: In this paper, the authors quantified quantificationally the effect of quantification on the quality of the data and the accuracy of the quantification of the results using a quantification-based approach.
Journal ArticleDOI
Strain Rate Dependence on the Dynamic Recrystallization Phenomena and Processing Map of Low Carbon Q690 V-N and V-N-Cr Microalloyed High-Strength Steels
Journal ArticleDOI
Effect of Molybdenum on the Impact Toughness of Heat-Affected Zone in High-Strength Low-Alloy Steel.
Xiaoyan Wu,Pengcheng Xiao,Shujing Wu,Chunliang Yan,Xuegang Ma,Zengxun Liu,Chen Wei,Liguang Zhu,Liguang Zhu,Qingjun Zhang +9 more
TL;DR: The microstructure, precipitates, and austenite grain in high-strength low-alloy steel were characterized by optical microscope, transmission electron microscope, and laser scanning confocal microscopy to investigate the effect of Mo on the toughness of steel as discussed by the authors.
Journal ArticleDOI
The Coupling Machine Learning for Microstructural Evolution and Rolling Force During Hot Strip Rolling of Steels
TL;DR: In this paper , a comprehensive set of machine learning (ML) models was developed through rolling forces to reveal the evolutions of recrystallization and grain size of austenite, in which the grain size was estimated by considering the grain shape effect after each rolling pass.
References
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Book
Recrystallization and Related Annealing Phenomena
F.J. Humphreys,M. Hatherly +1 more
TL;DR: In this paper, the authors discuss the extent to which we are able to formulate quantitative, physically-based models which can be applied to metal-forming processes, and the subjects treated in this book are all active research areas and form a major part of at least four regular international conference series.
Journal ArticleDOI
Dynamic and post-dynamic recrystallization under hot, cold and severe plastic deformation conditions
TL;DR: In this paper, the evolution of the new microstructures produced by two types of dynamic recrystallization is reviewed, including those brought about by severe plastic deformation (SPD).
Book
The Physical Metallurgy of Microalloyed Steels
TL;DR: In this article, the authors provide a substantial background to microalloyed steels with a wide selection of applications, some of which are very recent, and a well-illustrated practical guide.
Journal ArticleDOI
Effect of composition and process variables on Nb(C, N) precipitation in niobium microalloyed austenite
B. Dutta,C. M. Sellars +1 more
TL;DR: In this article, the authors used nucleation theory and the solubility product of niobium, carbon, and nitrogen in austenite to derive equations for the start of Nb (C, N) precipitation as a function of temperature and composition.
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