Experimental Characterization of Cyclic Deformation in Copper Using Ultrasonic Nonlinearity

被引：0
|
作者：
Kim, C. S. [1 ]
Park, Ik-Keun [2 ]
Jhang, Kyung-Young [3 ]
Kim, Nohyu [4 ]
机构：
[1] Penn State Univ, Engn Sci & Mech, State Coll, PA 16802 USA
[2] Seoul Natl Univ Technol, Dept Mech Engn, Gongneungdong, Seoul 139743, South Korea
[3] Hanyang Univ, Sch Mech Engn, Seoul 133791, South Korea
[4] Korea Univ Tech & Educ, Sch Mech Engn, Cheonan Si 330708, South Korea
来源：
JOURNAL OF THE KOREAN SOCIETY FOR NONDESTRUCTIVE TESTING | 2008年 / 28卷 / 03期
关键词：
Ultrasonic Nonlinearity; Dislocation; Harmonic Generation Technique; Fatigue;
D O I：
暂无
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We have experimentally investigated the cyclic deformation in copper using ultrasonic nonlinea ity. The observation and characterization of dislocation substructure have been conducted using transmission electron microscope and electron backscattered diffraction technique. The ultrasonic nonlinearity (beta/beta(0))) was measured by the harmonic generation technique after various fatigue cycles. The microstructural effect on the nonlinearity was discussed regarding the extent of dislocation substructures evolved from low cycle fatigue. The ultrasonic nonlinearity of copper monotonically increased with the fatigue cycles due to the evolution of dislocation cell substructures.
引用
收藏
页码：285 / 291
页数：7
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