Ultrasonic investigation of plastically deformed steel-contribution to analysis of degradation influence

被引：0
|
作者：
Bury, P. [1 ]
Barta, S?. [2 ]
Magula, V. [3 ]
Slugen, V. [2 ]
Šmida, T. [3 ]
机构：
[1] Department of Physics, Faculty of Electrical Engineering, Zilina University, 010 26 Zilina
[2] Department of Physics, Fac. of Electroeng. and Informatics, Slovak Technical University, 812 19 Bratislava
[3] Welding Research Institute, Račianska 71, 832 59 Bratislava
来源：
| 2003年 / University of Zilina卷 / 05期
关键词：
Acoustic waves - Attenuation - Degradation - Elasticity - Frequencies - Mathematical models - Plastic deformation - Tensile stress - Ultrasonics;
D O I：
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中图分类号：
学科分类号：
摘要：
Study of degradation influence on material properties of some steel components is very important because of their serviceable life. One of the most important side of the degradation process considering operation conditions is cumulated plastic deformation. The ultrasonic investigation of materials through the ultrasound attenuation and velocity measurements have been proved an effective tool of the study of structural changes caused also by plastic deformation due to the degradation process. In the contribution we present the results of both the frequency dependence of ultrasound attenuation and velocity measurements of steel samples (38ChN3MFA) with different relative plastic deformation (0, 1.5, 3 and 6%). The results are compared also with the measurements obtained by some other techniques, including the measurement of electrical conductivity, and the rate of positron-electron annihilation and breakage toughness.
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