In situ nonlinear ultrasonic for very high cycle fatigue damage characterization of a cast aluminum alloy

被引：18

作者：

Li, Wenkai ^{[1
]}

Cui, Haitao ^{[1
]}

Wen, Weidong ^{[1
]}

Su, Xuming ^{[2
]}

Engler-Pinto, C. C., Jr. ^{[2
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Jiangsu Prov Key Lab Aerosp Power Syst, Coll Energy & Power Engn, Nanjing, Peoples R China

[2] Ford Motor Co, Res & Innovat Ctr, Dearborn, MI 48121 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 645卷

关键词：

VHCF; Nonlinearity parameter; In situ; Cast aluminum alloy; CRACK-GROWTH; MICROSTRUCTURE; BEHAVIOR;

D O I：

10.1016/j.msea.2015.08.029

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this paper, the feedback signal of ultrasonic fatigue system was used to in situ deduce the accumulated fatigue damage via ultrasonic nonlinearity parameter. It was observed that compared with the resonant frequency, the ultrasonic nonlinearity parameter shows a greater sensitivity to fatigue damage like crack initiation and crack propagation. Conventional fatigue testing was carried out and the variation of specimen rigidity and plastic strain of the material were obtained which correlated well with the ultrasonic nonlinearity parameter. Also, the ultrasonic fatigue crack initiation was verified by interrupted test. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：248 / 254

页数：7

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