Elastic constant matrix measurement of SiCp reinforced aluminum metal matrix composites
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摘要: 为研究粉末冶金制备的碳化硅颗粒增强铝基复合材料(SiCp/Al)中SiCp含量对材料机械性能的影响,使用弹性波法测量了SiCp含量不同的标准试样的弹性常数矩阵.利用Christoffel方程建立了横观各向同性材料波速与弹性常数之间的关系,介绍了水浸斜入射法测量准横波和准纵波波速的基本原理和测量过程,基于上述原理进行了试验,计算出了被测试件的弹性常数.结果表明,SiCp/Al沿挤压方向的机械性能最高,并且随着SiCp含量的增加,弹性常数变大,材料的强度升高.Abstract: In order to reveal the relationship between SiCp volume content and mechanical property of SiCp reinforced aluminum metal-matrix composites (MMC) fabricated by powder metallurgy, the elastic constant matrix of the standard samples with different SiCp volume content were measured with elastic wave method. The relationship between the velocities of ultrasonic waves travelled in the material and the elastic constant matrix was deduced with Christoffel equation in transverse isotropy model. The basic principle of velocity measurement of quasi-longitudinal waves and quasi-transverse waves with the oblique incidence immersion method was introduced. The experiments based on the above mentioned principle and method were carried out and the elastic constant matrixes of the standard samples were calculated out. The results show that the mechanical property of material in the extrusion direction is better than the other directions, and with the increasing of SiCp content, the elastic constant rises and the intensity of the material enhances.
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Key words:
- ultrasonic testing /
- powder metallurgy aluminum /
- elastic waves
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[1] 罗斯J L.固体中的超声波[M].何存富,吴斌,王秀彦译.北京:北京科学技术出版社, 2004 Rose J L. Ultrasonic waves in solid media[M]. Translated by He Cunfu, Wu Bin, Wang Xiuyan.Beijing:Beijing Science and Technology Press,2004(in Chinese) [2] 宋国荣,何存富,黄垚, 等.小试件材料弹性常数超声测量方法的研究[J].应用基础与工程科学学报, 2007,15(2):226-234 Song Guorong, He Cunfu, Huang Yao, et al. On the measurement of the elastic constants of small-size samples by ultrasonic method[J]. Journal of Basic Science and Engineering,2007,15(2):226-234(in Chinese) [3] 王盘鑫.粉末冶金学[M].北京:冶金工业出版社, 2005:131-142 Wang Panxin. Powder metallurgy[M]. Beijing: Metallurgical Industry Press, 2005:131-142(in Chinese) [4] Jeong H, Hsu D K, Shannon R, et al. Characterization of anisotropic elastic constants of silicon-carbide particulate reinforced aluminum metal matrix composites: part I. experiment[J]. Metallurgical and Materials Transactions A, 1994, 25A:799-809 [5] Burgholzer P, Hofer C, Reitinger B,et al. Non-contact determination of elastic moduli of continuous fiber reinforced metals[J]. Composites Science and Technology,2005,65:301-306 -
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