Effect of Ti on Phase Transformation and Grain Evolution in Nb/V Microalloyed Steel

Author

Barshan Saha
henry Haffner
Mario F. Buchely, Missouri University of Science and TechnologyFollow
Simon Naumovich Lekakh, Missouri University of Science and TechnologyFollow
K. Chandrashekhara, Missouri University of Science and TechnologyFollow
Ronald J. O'Malley, Missouri University of Science and TechnologyFollow

Abstract

Low-carbon Nb/V microalloyed steels are extensively used for pipeline construction due to a good combination of mechanical properties and weldability. Austenite/ferrite transformation and grain size evolution during cooling after hot rolling is pivotal to obtaining desired properties. In this study, phase transformation and grain size evolution in two as-cast Nb/V microalloyed low-carbon steels billets were investigated with and without Ti additions, utilizing a quenching dilatometer. Significant ferrite grain morphology changes were observed in Ti-added steel at 10 and 1°C/s cooling rates. Mechanisms of observed changes were discussed and compared with thermodynamic/kinetic predictions.

Recommended Citation

Saha, Barshan; Haffner, henry; Buchely, Mario F.; Lekakh, Simon Naumovich; Chandrashekhara, K.; and O'Malley, Ronald J., "Effect of Ti on Phase Transformation and Grain Evolution in Nb/V Microalloyed Steel" (2024). PSMRC Faculty Research. 8.
https://scholarsmine.mst.edu/psmrc_facwork/8

Department(s)

Materials Science and Engineering

Second Department

Mechanical and Aerospace Engineering

Keywords and Phrases

Dilatometry, Acicular Ferrite, Quasi-Ferrite, Pinning Agent, Bainite Phase Transformation

Document Type

Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 Association for Iron & Steel Technology, All Rights Reserved

Publication Date

8 May, 2024