In situ ultrasonic monitoring of surface fatigue crack initiation and growth from surface cavity

被引：54

作者：

Rokhlin, SI ^{[1
]}

Kim, JY ^{[1
]}

机构：

[1] Ohio State Univ, Nondestruct Evaluat Program, Edison Joining Technol Ctr, Columbus, OH 43221 USA

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2003年 / 25卷 / 01期

关键词：

fatigue; ultrasonic crack depth measurement; surface acoustic wave; ultrasonic nondestructive evaluation; in situ fatigue experiment;

D O I：

10.1016/S0142-1123(02)00055-5

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A surface acoustic wave method for in situ monitoring of fatigue crack initiation and evolution from a pit-type surface flaw is described. The method is demonstrated for fatigue tests on Al 2024-T3 and Inconel 718 samples with different surface pit sizes. The surface acoustic wave signature is acquired continuously during the fatigue cycle without stopping the fatigue test. Crack initiation and propagation are identified clearly from the ultrasonic surface wave reflection signals. Crack initiation in the Inconel 718 sample is observed to occur at a much later stage of fatigue life than in the Al-2024-T3 sample. The ultrasonic results are supported by fractographs of fracture surfaces. Small crack sizing is performed from the ultrasonic signatures using the low frequency scattering model. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：41 / 49

页数：9

共 14 条

[1]

AYTER S, 1980, P DARPA AFML REV PRO, P394

[2]

Buck O., 1984, Journal of Nondestructive Evaluation, V4, P203, DOI 10.1007/BF00566225

[3]

BUCK O, 1983, REV PROGR QUANTITATI, V2, P345

[4]

BUCK O, 1988, ASTM STP, V982, P536

[5]

CHANG JCI, 1995, STRUCTURAL INTEGRITY, V47, P1

[6]

Dai W., 1999, REV PROGR QUANTITA B, V18, P2225

[7]

Freund L. B., 1971, International Journal of Solids and Structures, V7, P1199, DOI 10.1016/0020-7683(71)90061-8

[8] Surface acoustic wave measurements of small fatigue cracks initiated from a surface cavity [J].

Kim, JY ;

Rokhlin, SI .

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, 2002, 39 (06) :1487-1504

[9]

Resch M.T., 1992, ASTM STP, P169

[10] In situ ultrasonic measurement of crack closure [J].

Rokhlin, SI ;

Kim, JY .

INTERNATIONAL JOURNAL OF FATIGUE, 2003, 25 (01) :51-58

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