Abstract
Scanning electron microscopy (SEM), transmission electron microscopy (TEM), small-angle X-ray scatter (SAXS) and atom probe tomography (APT) were combined to characterize the change of δ phase microstructure under the effect of in-situ iron-rich nanoparticles. In-situ nanoparticle wall model was proposed to elucidate the effect of high density of iron-rich nanoparticles on inhibiting tin segregation which causes δ phase formation. This work sheds light on a potential pathway for fabricating bulk homogenous materials during casting process.
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