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TEM characterization of precipitates in the segregated regions of a low‐carbon, low‐manganese, titanium‐added steel
Author(s) -
AMINORROAYA SIMA,
DIPPENAAR RIAN
Publication year - 2007
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/j.1365-2818.2007.01793.x
Subject(s) - manganese , titanium , characterization (materials science) , materials science , metallurgy , carbon fibers , carbon steel , precipitation , nanotechnology , composite material , composite number , corrosion , physics , meteorology
Summary A concentric solidification technique has been employed to simulate sulphide precipitation at the centreline of a continuously cast low‐carbon, low‐manganese, titanium‐added steel slab. Selected precipitates were identified using transmission electron microscopy following sample preparation by focused ion beam milling techniques. FeTiS 2 and hexagonal MnS containing iron atoms form in close proximity to each other in super‐saturated areas of the concentrically solidified sample. The presence of FeTiS 2 precipitates in low‐carbon steel has been verified for the first time, and the crystal structure determined by electron diffraction analysis as a trigonal CdI 2 ‐type with a P 3 m1 space group and lattice parameters of a = 0.341 nm and c = 0.569 nm.