발간논문

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Vol.40, No.5, 473 ~ 478, 2002
Title
Transformations / Precipitation of η - Carbide upon Tempering in High Tensile Strength Steel
이갑호Kap Ho Lee,장성호Seong Ho Jang,김대영Dae Young Kim
Abstract
The precipitation of carbide in tempered high tensile strength steel has been characterized by using high resolution electron microscopy and the combined use of a computer-aided image processing system. The lath-like η-Fe_2C carbide precipitated along <211>_M directions with 8-11 ㎚ in width are observed in the martensite plate. The orientation relationship between the η-Fe_2C carbide and the martensite matrix was determined to be (010)_η (110)_M, [101]_η [111]_M. The twin structure having {211} habit plane is occasionally observed in the martensite matrix, and the carbides were not preferentially precipitated at twin boundaries, in contrast with the observation of other investigators.
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