Homogeneity testing of aluminum metal matrix composites by TIRP method
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摘要: 为检测碳化硅颗粒增强铝基复合材料的均匀性,利用与厚度无关声反射板(TIRP,Thickness Independent Reflector Plate)法对材料声速进行成像,排除了材料厚度的影响,提高了检测精度.介绍了TIRP法的基本原理和试验系统的结构,提出了一种基于双次扫描方式的TIRP实时成像方法,进一步提高了精度.利用底面反射回波法、单次扫描TIRP法和双次扫描TIRP法进行了试验,并对成像结果进行了比较,能够看出基于双次扫描的TIRP法可获得更准确清晰的声速图像.最后对误差来源进行了分析,指出了改进的方向.
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关键词:
- 超声声速测量 /
- 金属基复合材料 /
- "与厚度无关声反射板"法
Abstract: In order to evaluate the homogeneity of SiCp reinforced aluminum metal-matrix composites (MMC) fabricated by powder metallurgy, an ultrasonic velocity imaging was carried out with the method of thickness independent reflector plate (TIRP). Accuracy and precision were improved and the thickness was unnecessary in the velocity imaging with TIRP method. Firstly, the purpose of ultrasonic velocity imaging of MMC and basic principle of TIRP were introduced. Secondly, the structure of ultrasonic scan system was described. A double-scan method was applied to improve accuracy. Thirdly, the experiment results of ultrasonic velocity imaging of MMC specimen obtained with back surface echo (BSE), single-scan and double-scan method of TIRP respectively were compared and discussed. The images generated with double-scan method of TIRP have more details than those with BSE and single-scan method. Finally, the factors affecting accuracy and precision in the implementation were considered which may be used to advance the experiment. -
[1] Lemster K, Graule T, Minghetti T, et al. Mechanical and machining properties of X38CrMoV5-1/Al2O3 metal matrix composites and components[J]. Materials Science and Engineering A,2006,420(1/2):296-305 [2] 魏勤,张迎元. SiCp /Al复合材料中增强体SiC含量的测定方法研究[J].华东船舶工业学院学报:自然科学版, 2005, 19(4): 86-89 Wei Qin, Zhang Yingyuan. Research on volume fraction mensuration of SiC reinforcer in SiCp/Al composites[J]. Journal of East China Shipbuilding Institute:Natural Science Edition, 2005, 19(4):86-89(in Chinese) [3] Liaw P K. Determining material properties of metal-matrix composites by NDE[J]. JOM, 1992(10):36-40 [4] Dong Fei, Hsu D K, Warchol M. Simultaneous velocity, thickness and profile imaging by ultrasonic scan[J].Journal of Nondestructive Evaluation, 2001, 20(3):95-112 [5] 他得安,王威琪,余建国.松质骨中两种纵波的传播特性分析[J].中国生物医学工程学报,2005,24(1):17-20 Ta Dean, Wang Weiqi, Yu Jianguo. Analysis of the propagation properties of two compressional waves in cancellous bone[J]. Chinese Journal of Biomedical Engineering,2005,24(1):17-20(in Chinese) [6] Hsu D K. Simultaneous velocity and thickness imaging by ultrasonic scan [J]. QNDE, 2001, 20B:695-702 -
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