Development of atom probe specimen preparation techniques for specific regions in steel materials |
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Authors: | Takahashi Jun Kawakami Kazuto Yamaguchi Yukiko Sugiyama Masaaki |
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Affiliation: | Advanced Technology Research Labs., Nippon Steel Corporation, 20-1 Shintomi, Futtsu-city, Chiba 293-8511, Japan. takahasi@re.nsc.co.jp |
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Abstract: | More elaborated specimen preparation techniques for atom probe analysis were developed using a focused ion beam with a sample lift-out system so as to expand the application field in steel materials. The techniques enable atom probe analysis of sample steel at site-specific regions of interest. The preferable form of the needle specimen was provided by electrostatic field calculation using a finite element method. The new techniques were applied to the observation of a bainite-ferrite interface in a low carbon steel, and atomic-scale partitioning and segregation of alloying elements at the phase interface were directly observed in three dimensions. |
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Keywords: | 42 30 Wb 61 66 Dk |
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