Abstract：The MnS free-cutting steel and EH36 electroslag weld zone samples were selected as the research object for the study. The layer-by-layer sectioning and imaging of inclusions were firstly conducted using the Auto Slice&View functions of focused ion beam-scanning electron microscope(FIB-SEM). Then, the Amira software was used for three-dimensional reconstruction based on the contrast of inclusions to obtain the morphology and distribution of signal inclusion and composite inclusion in steel materials. The phase identification of composite inclusion also combined with the elemental mapping analysis function of electron probe micro-analyzer(EPMA)and phase analysis function of electron back scattering diffraction(EBSD). The results showed that the inclusions in MnS free-cutting steel showed the coexisting distribution of strip type, spindle shape and ellipsoidal type, while the composite inclusion in EH36 electroslag weld zone sample was mainly composed of crystalline Mn2TiO4 phase and amorphous phase with rich Al, Ca, Mg, Si, Mn and O. Moreover, these two phases were associated with each other. The three-dimensional reconstruction graph clearly showed the morphology and distribution characteristics of inclusions, which provided important basis to study the influence of inclusions on steel properties.
吴园园,洪慧敏,张 珂. 聚焦离子束扫描电镜三维重构夹杂物的形态和分布[J]. 冶金分析, 2016, 36(4): 6-10.
WU Yuan-yuan, HONG Hui-min, ZHANG Ke. Three-dimensional reconstruction of morphology and distribution of inclusions by focused ion beam-scanning electron microscope. , 2016, 36(4): 6-10.
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