Microstructure of Co Precipitation Strengthened B2-Ordered NiAl

저자

오*섭

게재저널

METALS AND MATERIALS INTERNATIONAL (http://www.kim.or.kr/default.asp)

키워드

intermetallics, aging, microstructure, transmission electron microscopy (TEM), hardness test

개요

A transmission electron microscopy investigation on the phase decompoosition of B2-ordered (Ni, Co)Al supersaturated with Ni and Co has revealed the precipitation of (Ni,Co)₂Al which has not been expected from the reproted equilibrium phase diagram. The (Ni,Co)₂Al phase has a hexagonal structure and take a rodperatures below 873 K, a long period superlattice structure appears in the hexagonal (Ni,Co)₂Al phase. The orientation relationship between the (Ni,Co)₂Al precipitates and the B2-(Ni,Co)Al matrix is found to be (0001)ｐ//(111)B2 and [1210]ｐ//[110]B2, where the suffix p and B2 denote the (Ni,Co)₂Al precipitates and the B2-(Ni,Co)Al matrix, respectively. (Ni,Co)Al hardens appreciably by the fine precipitation of the (Ni,Co)₂Al phase.

첨부파일

• 오창섭-Microstructure of Co Precipitation Strengthened B2-Ordered NiAl.pdf [8,602,699 byte]

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