Fully Non-Contact Assessment of Acoustic Nonlinearity According to Plastic Deformation in Al6061 Alloy

被引：3

作者：

Lee, Hyeon ^{[1
]}

Chung, Cheon ^{[1
]}

Kim, Chung-Seok ^{[1
]}

Jhang, Kyung-Young ^{[1
]}

机构：

[1] Hanyang Univ, Sch Mech Engn, Seoul 133791, South Korea

来源：

JOURNAL OF THE KOREAN SOCIETY FOR NONDESTRUCTIVE TESTING | 2012年 / 32卷 / 04期

关键词：

Acoustic Nonlinearity; Laser-generated Surface Wave; Laser Ultrasound Detector; Two-wave Mixing;

D O I：

10.7779/JKSNT.2012.32.4.388

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This study proposes a fully non-contact measurement method to assess acoustic nonlinearity of narrowband surface waves generated by a line-arrayed laser beam by using a laser-ultrasonic detector in the way of two-wave mixing (TWM) method. This method was applied to figure out a relationship between plastic deformation and nonlinearity characteristics of a plastically deformed aluminum specimens. The experimental results showed that the acoustic nonlinearity of the laser-generated surface wave increased proportionally to the level of tensile deformation. This tendency is in good agreement with the result of measurement by contact method with PZT-transducer.

引用

页码：388 / 392

页数：5

共 29 条

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