Formation of nanocrystals in Ti 78Fe 15Si 7 amorphous alloy with a wide supercooled liquid region

An as-quenched amorphous Ti 78Fe 15Si 7 alloy with a large supercooled liquid region (61 K) was investigated using X-ray diffraction, differential scanning and transmission electron microscopy (TEM). This amorphous alloy transforms into primary nano-sized β-Ti phase particles (<20 nm) of spherica...

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Published inMaterials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 366; no. 2; pp. 421 - 425
Main Authors Kim, K.B., Ko, B.C., Pak, S.J.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2004
Subjects
Primary crystallization
Supercooled liquid
Tensile fracture strength
Primary crystallization
Supercooled liquid
Tensile fracture strength
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Summary:An as-quenched amorphous Ti 78Fe 15Si 7 alloy with a large supercooled liquid region (61 K) was investigated using X-ray diffraction, differential scanning and transmission electron microscopy (TEM). This amorphous alloy transforms into primary nano-sized β-Ti phase particles (<20 nm) of spherical shape upon a first exothermic reaction. The remaining amorphous phase transforms to the Ti 2Fe phase followed by the Ti 5Si 3 phase upon the second and third exothermic reaction. The tensile fracture strength was 1318 MPa for the amorphous alloy and increased up to 1876 MPa for a volume fraction of 15% primary β-Ti phase.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2003.08.026