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(a) Optical micrograph showing martensite (M) and grain boundary precipitates (GBPs) at room temperature, (b) optical micrographs taken at 20 and showing surface relief due to thermal MT for Fe-36Mn-15Al alloy, the micrograph at being taken after obtaining it at in the same region, (c) TEM bright field image, and (d) the corresponding SAD pattern taken from Fe-36Mn-15Al alloy.
XRD patterns taken from Fe-36Mn-15Al alloy sheets (a) as-quenched and (b) cold-rolled to a reduction ratio of 50%.
Effective spontaneous magnetization as a function of reduction ratio, extracted from the M-H curves of Fe-36Mn-15Al alloy (inset).
Schematic illustration of phase equilibrium related to and temperatures in Fe–Mn–X (X: ferrite stabilizing element).
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