Evaluation of the Fatigue Life in Aluminum Alloy Welded Joint by Nonlinear Ultrasonic Testing

被引：4

作者：

Gang, Tie ^{[1
]}

Wan, Chuhao ^{[1
]}

Zhu, Ronghua ^{[1
]}

Zhao, Libin ^{[2
]}

机构：

[1] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Heilongjiang, Peoples R China

[2] Nucl & Radiat Safety Ctr, Beijing 100000, Peoples R China

来源：

PHYSICAL AND NUMERICAL SIMULATION OF MATERIALS PROCESSING VII | 2013年 / 762卷

关键词：

nonlinear ultrasonic testing; fatigue life; welded joint; aluminum alloy; ACOUSTIC HARMONIC-GENERATION; ADHESIVE JOINTS;

D O I：

10.4028/www.scientific.net/MSF.762.673

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Fatigue is a common phenomenon in welded structures. Prediction of fatigue life of welded joints in-service is still an unsolved puzzle by the conventional linear ultrasonic testing method. However, the nonlinear ultrasonic waves or the acoustic nonlinear signal can provide clear signs of the accumulative fatigue damage in materials, as reported by a number of researchers. Hence, the nonlinear ultrasonic testing method has revealed a tremendous potential for fatigue damage evaluation. This paper presents a study to characterize the fatigue damage using the analysis of the signal characteristics and a new nonlinear parameter. Based on the very high-cycle fatigue testing results for a 6N01 aluminum alloy welded joint, the relationship between the amplitude of the second-order harmonic and fatigue cycling has been established. The nonlinear ultrasonic system test results show that the amplitude of the second-order harmonic increases at the early fatigue stage, with further increase in cyclic loading until reaching a peak. Metallographic examinations show that a fatigue crack will nucleate in the weld joint in the stage as the amplitude reaches the peak value Finally, theoretical and experimental results confirm that the amplitude of the second-order harmonic is useful for assessing the fatigue life of a 6N01 aluminum alloy welded joint.

引用

页码：673 / +

页数：2

共 18 条

[11]

Lesacutenicki K.J., 2011, NDT&E INT, V44, P721

[12] Thermo-acoustic fatigue characterization [J].

Meyendorf, NGH ;

Rösner, H ;

Kramb, V ;

Sathish, S .

ULTRASONICS, 2002, 40 (1-8) :427-434

[13]

Mikael A., 2012, SMART MATER STRUCT, V21, P1

[14]

Na J.K., 1996, REV PROGR QUANTITATI

[15] Fatigue damage assessment by nonlinear ultrasonic materials characterization [J].

Nagy, PB .

ULTRASONICS, 1998, 36 (1-5) :375-381

[16] Acoustic nonlinearities in adhesive joints [J].

Rothenfusser, M ;

Mayr, M ;

Baumann, J .

ULTRASONICS, 2000, 38 (1-8) :322-326

[17] An on-line combined linear-nonlinear fatigue crack detection technique [J].

Vanlanduit, S ;

Parloo, E ;

Guillaume, P .

NDT & E INTERNATIONAL, 2004, 37 (01) :41-45

[18] Assessment of the adhesion quality of fusion-welded silicon wafers with nonlinear ultrasound [J].

Wegner, A ;

Koka, A ;

Janser, K ;

Netzelmann, U ;

Hirsekorn, S ;

Arnold, W .

ULTRASONICS, 2000, 38 (1-8) :316-321

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