Crystallography and morphology of MC carbides in niobium-titanium modified as-cast HP alloys
Metallurgical and Materials Transactions A, 2014•Springer
The microstructures of two as-cast heats of HP alloy stainless steels modified with niobium
and titanium were examined with particular attention paid to the interdendritic niobium-
titanium-rich carbides formed during solidification of these alloys. Generally, these
precipitates obtain a blocky morphology in the as-cast condition. However, the (NbTi) C
precipitates may obtain a nodular morphology. To provide further insight to the origin of the
two different morphologies obtained by the (NbTi) C precipitates in the HP-NbTi alloy, the …
and titanium were examined with particular attention paid to the interdendritic niobium-
titanium-rich carbides formed during solidification of these alloys. Generally, these
precipitates obtain a blocky morphology in the as-cast condition. However, the (NbTi) C
precipitates may obtain a nodular morphology. To provide further insight to the origin of the
two different morphologies obtained by the (NbTi) C precipitates in the HP-NbTi alloy, the …
Abstract
The microstructures of two as-cast heats of HP alloy stainless steels modified with niobium and titanium were examined with particular attention paid to the interdendritic niobium-titanium-rich carbides formed during solidification of these alloys. Generally, these precipitates obtain a blocky morphology in the as-cast condition. However, the (NbTi)C precipitates may obtain a nodular morphology. To provide further insight to the origin of the two different morphologies obtained by the (NbTi)C precipitates in the HP-NbTi alloy, the microstructure and crystallography of each have been studied in detail using scanning electron microscopy, transmission electron microscopy, various electron diffraction methods (EBSD, SAD, and CBED), and energy-dispersive X-ray spectroscopy.
Springer
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