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首页> 外文期刊>International Journal of Microstructure and Materials Properties >Effect of grain size on the ultrasonic parameters in stainless steels
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Effect of grain size on the ultrasonic parameters in stainless steels

机译：晶粒度对不锈钢超声参数的影响

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摘要

In this study, the influence of grain size on the velocity of ultrasonic waves and ultrasonic attenuation in stainless steels was investigated. The aim of this study is to demonstrate the capability of ultrasonic techniques in the assessment of the grain size of steels. Heat treatment processes were carried out in order to obtain different grain sizes for AISI 304 stainless steel specimens. AISI 316 stainless steel specimens were produced by casting and tested in as-cast condition. Velocities of ultrasonic longitudinal and transverse waves were measured by means of pulse-echo method using contact type normal beam probes with 1 and 4 MHz frequencies. Apparent attenuation coefficient of longitudinal waves was determined at 4 MHz. Young's modulus of the specimens was also determined. The results showed that ultrasonic longitudinal and transverse wave velocities and Young's modulus were decreased with increasing grain size of the specimens. The apparent attenuation coefficient of longitudinal waves was increased with increasing grain size.
机译：在这项研究中，研究了晶粒尺寸对不锈钢中超声波速度和超声波衰减的影响。这项研究的目的是证明超声波技术在评估钢晶粒尺寸方面的能力。为了获得AISI 304不锈钢试样的不同晶粒尺寸，进行了热处理工艺。 AISI 316不锈钢试样是通过铸造生产的，并在铸态条件下进行了测试。超声波纵波和横波的速度是通过脉冲回波法，使用频率为1和4 MHz的接触式法向电子束探头测量的。在4 MHz下确定纵波的表观衰减系数。还确定了样品的杨氏模量。结果表明，随着样品尺寸的增加，超声波的纵向和横向波速和杨氏模量均降低。纵向波的表观衰减系数随着晶粒尺寸的增加而增加。

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