Monitoring austenite decomposition by ultrasonic velocity
Monitoring austenite decomposition by ultrasonic velocity
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DOI：
10.1016/j.msea.2006.03.056
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发表时间：
2006-06-15
期刊：
影响因子：
6.4
通讯作者：
Damm, Edward B.
中科院分区：
文献类型：
--
作者：
Kruger, Silvio E.;Damm, Edward B.
用激光-超声技术测量了低合金钢奥氏体分解过程中的超声纵向速度，并与透射电镜法进行了比较。它表明，该技术可能是一个有趣的替代crackometry。确定了声速和钢中各相的温度依赖性，并通过一个简单的混合物近似定律来计算分解的奥氏体。激光超声技术作为一种无损、非接触的检测技术，可以在工业生产线上对真实的产品进行奥氏体相变的监测，这是传统的硬度计难以实现的。皇冠版权所有（c）2006年出版的爱思唯尔B. V.保留所有权利。
The ultrasonic longitudinal velocity measured by the laser-ultrasonic technique is compared to dilatometry for the monitoring of austenite decomposition of low alloy steels. It is demonstrated that the technique could be an interesting alternative to dilatometry. The temperature dependence of the ultrasonic velocity and the various phases in steels is determined and used to calculate the decomposed austenite by a simple law of mixtures approximation. As a non-destructive and non-contact technique, laser-ultrasonics can be applied to monitor austenite transformation of real products in an industrial production line, which would be much more difficult with dilatometry. Crown Copyright (c) 2006 Published by Elsevier B.V. All rights reserved.