A correlative approach to segmenting phases and ferrite morphologies in transformation-induced plasticity steel using electron back-scattering diffraction and energy dispersive X-ray spectroscopy

Azdiar A Gazder; Fayez Al-Harbi; Hendrik Th Spanke; David R G Mitchell; Elena V Pereloma

doi:10.1016/j.ultramic.2014.07.005

A correlative approach to segmenting phases and ferrite morphologies in transformation-induced plasticity steel using electron back-scattering diffraction and energy dispersive X-ray spectroscopy

Ultramicroscopy. 2014 Dec:147:114-32. doi: 10.1016/j.ultramic.2014.07.005. Epub 2014 Jul 19.

Authors

Azdiar A Gazder¹, Fayez Al-Harbi², Hendrik Th Spanke², David R G Mitchell³, Elena V Pereloma⁴

Affiliations

¹ Electron Microscopy Centre, University of Wollongong, New South Wales 2500, Australia. Electronic address: azdiar@uow.edu.au.
² School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, New South Wales 2522, Australia.
³ Electron Microscopy Centre, University of Wollongong, New South Wales 2500, Australia.
⁴ Electron Microscopy Centre, University of Wollongong, New South Wales 2500, Australia; School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, New South Wales 2522, Australia.

PMID: 25126753
DOI: 10.1016/j.ultramic.2014.07.005

Abstract

Using a combination of electron back-scattering diffraction and energy dispersive X-ray spectroscopy data, a segmentation procedure was developed to comprehensively distinguish austenite, martensite, polygonal ferrite, ferrite in granular bainite and bainitic ferrite laths in a thermo-mechanically processed low-Si, high-Al transformation-induced plasticity steel. The efficacy of the ferrite morphologies segmentation procedure was verified by transmission electron microscopy. The variation in carbon content between the ferrite in granular bainite and bainitic ferrite laths was explained on the basis of carbon partitioning during their growth.

Keywords: Bainite; Carbon partitioning; Electron back-scattering diffraction (EBSD); Energy dispersive X-ray spectroscopy (EDS); Steel; Transformation-induced plasticity (TRIP); Transmission electron microscopy (TEM).

Publication types

Research Support, Non-U.S. Gov't