孙广开, 周正干, 陈曦. SiCp/Al复合材料增强体偏聚超声三维成像方法[J]. 南昌航空大学学报(自然科学版), 2016, 30(3): 91-96. DOI: 10.3969/j.issn.1001-4926.2016.03.017
引用本文: 孙广开, 周正干, 陈曦. SiCp/Al复合材料增强体偏聚超声三维成像方法[J]. 南昌航空大学学报(自然科学版), 2016, 30(3): 91-96. DOI: 10.3969/j.issn.1001-4926.2016.03.017
SUN Guang-kai, ZHOU Zheng-gan, CHEN Xi. 3D Ultrasonic Imaging Method for Particle Segregation of Reinforcement in SiCp/Al Composites[J]. Journal of nanchang hangkong university(Natural science edition), 2016, 30(3): 91-96. DOI: 10.3969/j.issn.1001-4926.2016.03.017
Citation: SUN Guang-kai, ZHOU Zheng-gan, CHEN Xi. 3D Ultrasonic Imaging Method for Particle Segregation of Reinforcement in SiCp/Al Composites[J]. Journal of nanchang hangkong university(Natural science edition), 2016, 30(3): 91-96. DOI: 10.3969/j.issn.1001-4926.2016.03.017

SiCp/Al复合材料增强体偏聚超声三维成像方法

3D Ultrasonic Imaging Method for Particle Segregation of Reinforcement in SiCp/Al Composites

  • 摘要: 为表征SiCp/Al复合材料内部增强体偏聚三维空间位置和分布特征,研究超声三维成像方法。采用粉末冶金工艺制备模拟SiCp颗粒偏聚的SiCp/Al复合材料试样,根据超声成像原理,研究材料内部SiCp颗粒偏聚的超声三维重建方法和超声信号校正与处理方法,采用水浸式超声波系统对试样进行超声三维成像,得出SiCp颗粒偏聚的三维空间位置和分布特征。研究结果表明:对SiCp/Al复合材料试样进行超声成像检测,得到的两处人工缺陷分别距试样上表面约7.2、6.3 mm、尺寸约为3.9 mm×2.1 mm和4.3 mm×2.3 mm;选取超声图像表征的试样内部SiCp颗粒偏聚位置,采用金相法分析其组织结构,观测到SiCp颗粒偏聚的细观特征。

     

    Abstract: In order to characterize the 3D space position and distribution characteristics of particle segregation of reinforcement in SiCp/Al composites, the 3D ultrasonic imaging method is studied. A SiCp/Al composite specimen with simulated SiCp particle segregation is prepared by powder metallurgy processing. Based on the theory of ultrasonic imaging, the correction and processing method for ultrasonic signal and the 3D ultrasonic reconstruction method for SiCp particle segregation is analyzed. 3D ultrasonic imaging of the SiCp/Al specimen is carried out, and the 3D space position and distribution characteristics of SiCp particle segregations are obtained. The results proved that, from the ultrasonic images of the specimen, it can be measured that the distances of the two artificial defects to the upper surface of the specimen are about 7.2 mm and 6.3 mm, and the sizes of the two defects are about 3.9 mm×2.1 mm and 4.3 mm×2.3 mm. The areas existing SiCp particle segregations that characterized by ultrasonic imaging are chosen in the specimen, and the material microstructures of these areas are analyzed by metallographic method. The microscopic features of SiCp particle segregations are observed.

     

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