Three-dimensional Reconstruction of Microstructure of Semi-solid 7075 Al Alloy Based on Tomographic Images

Liu Hongjun; Zhang Dongxu; Zhang Jingyu

doi:10.15980/j.tzzz.2017.04.002

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Three-dimensional Reconstruction of Microstructure of Semi-solid 7075 Al Alloy Based on Tomographic Images
Vol. 37, Issue 4, Pages: 354-357(2017)
Published： 2017 ，
DOI： 10.15980/j.tzzz.2017.04.002

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[1]刘洪军,张东旭,张靖宇.半固态7075铝合金组织的连续切片三维重构[J].特种铸造及有色合金,2017,37(04):354-357.

Liu Hongjun, Zhang Dongxu, Zhang Jingyu. Three-dimensional Reconstruction of Microstructure of Semi-solid 7075 Al Alloy Based on Tomographic Images. [J]. Special Casting & Nonferrous Alloys 37(4):354-357(2017)
[1]刘洪军,张东旭,张靖宇.半固态7075铝合金组织的连续切片三维重构[J].特种铸造及有色合金,2017,37(04):354-357. DOI： 10.15980/j.tzzz.2017.04.002.

Liu Hongjun, Zhang Dongxu, Zhang Jingyu. Three-dimensional Reconstruction of Microstructure of Semi-solid 7075 Al Alloy Based on Tomographic Images. [J]. Special Casting & Nonferrous Alloys 37(4):354-357(2017) DOI： 10.15980/j.tzzz.2017.04.002.

摘要

基于连续切片的金相照片

采用数字化处理技术对半固态7075铝合金的组织进行了三维重构。首先对再结晶重熔法制备的半固态7075铝合金进行分层制样和二维金相组织采集;然后经过图像定位、对齐、二值化、多层堆叠等数字化处理

进行三维组织重构

从而完成从二维信息到三维信息的转换

实现了显微组织三维可视化表征与三维观测。通过三维组织重构发现

所制备的半固态7075铝合金微观结构为固相颗粒状晶粒间隙中填充连通或孤立液相。用三维组织重构可以很方便地获取组织的空间结构特征

使组织表征更为准确和具体。

Abstract

Based on metallograph of tomographic slices

the 3Dreconstruction method was applied for analyzing the microstructure characteristics of semi-solid 7075 Al alloy by the digital processing technique.The samples of semi-solid 7075 Al alloy were prepared by the recrystallization and partial remelting process

and then the two-dimensional photos of tomographic slices were obtained by metallographic microscope.After the digital processing process including locating

aligning

thresholding and stacking of multilayer images

the 3Dmicrostructure was reconstructed by converting the two-dimensional information to three-dimensional information.From the reconstructed 3D microstructure

it is found that the microstructure of semi-solid 7075 Al alloy prepared is connected or isolated liquid phase filled in the gaps among the solid phase.The space structure feature of microstructure of semi-solid alloys can be characterized easily by 3D microstructure

so the microstructure can be characterized more accurately.