Electromagnetic acoustic resonance for studying dislocation formation in polycrystalline pure copper during deformation

H. Ogi, N. Suzuki, M. Hirao
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引用次数: 2

Abstract

In this paper, the ultrasonic velocity and attenuation are continuously measured during deformation of a polycrystalline pure copper by means of the electromagnetic acoustic resonance (EMAR). The EMAR is a combination of an electromagnetic acoustic transducer (EMAT) and the ultrasonic resonant technique, in which the noncontact transduction allows absolute measurement of the phase velocity and attenuation. This technique enables the simultaneous determination of the velocity and attenuation of the shear wave polarized parallel to the stress, propagating in the thickness direction. For the explanation of the observed responses, the traditional string model is modified by incorporating the resonant frequency shift due to the acoustoelasticity.
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多晶纯铜变形过程中位错形成的电磁声共振研究
本文用电磁声共振(EMAR)连续测量了多晶纯铜在变形过程中的超声速度和衰减。EMAR是电磁声换能器(EMAT)和超声共振技术的结合,其中非接触式换能器可以绝对测量相速度和衰减。该技术可以同时测定沿厚度方向传播的与应力平行的横波偏振的速度和衰减。为了解释观测到的响应,对传统的弦模型进行了修正,加入了由于声弹性引起的共振频移。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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