Article,
The use of X-ray diffraction, microscopy, and magnetic measurements for analysing microstructural features of a duplex stainless steel
MATERIALS CHARACTERIZATION, 54 (4-5): 387-393 (2005)
DOI: 10.1016/j.matchar.2004.12.009
Abstract
X-ray diffraction, light optical microscopy, and magnetization
saturation measurements were employed to analyse the microstructural
features of a UNS S31803 duplex stainless steel modified by
high-temperature treatments. The samples were heated to 1300 degrees C
and cooled by different ways to produce five different microstructures.
Solution treatments at 1000 degrees C were also employed to produce
another five conditions. Three methods were employed to determine the
austenite/ferrite proportions. X-ray diffraction gave higher austenite
values than the other methods, due to the influence of texture, but can
be successfully used to determine the microstrain level in each phase.
Magnetic saturation measurement is a very simple and precise method for
quantification of austenite and ferrite volume fractions in samples that
were fast-cooled and slow-cooled. Light microscopy can give a fast and
precise measurement of the phase proportions and reveals important
features related to the morphology of the phases, but in the samples
where the austenite content is low, quantification becomes difficult and
imprecise. (c) 2005 Published by Elsevier Inc.
