Influence of re-ultrasonic impact treatment on fatigue behaviors of S690QL welded joints

Yang Liu; Dongpo Wang; Caiyan Deng; Liqian Xia; Lixing Huo; Lijun Wang; Baoming Gong

doi:10.1016/j.ijfatigue.2014.03.024

Influence of re-ultrasonic impact treatment on fatigue behaviors of S690QL welded joints

Yang Liu, Dongpo Wang, Caiyan Deng^*, Liqian Xia, Lixing Huo, Lijun Wang, Baoming Gong

^*Corresponding author for this work

Tianjin University

Research output: Contribution to journal › Article › peer-review

47 Citations (Scopus)

Abstract

The effects of re-ultrasonic impact treatment with different fatigue cycle intervals between two UITs on the fatigue life of S690QL cruciform welded joints were investigated. Fatigue life, residual stress, SEM micrographs of specimen cross profile, and fatigue fracture were determined. Fatigue determination results indicated that re-UIT increased the total fatigue life when the fatigue cycle interval between two UITs was appropriate. The contribution of residual stress produced by re-UIT to fatigue life was not significant at room temperature. The damages caused by UIT were confirmed with optical microscope and scanning electron microscope. Considering that UIT could close cracks, the effect of re-UIT on fatigue life strongly depended on the competition between the role of closing cracks and the formation process of new damage.

Original language	English
Pages (from-to)	155-160
Number of pages	6
Journal	International Journal of Fatigue
Volume	66
DOIs	https://doi.org/10.1016/j.ijfatigue.2014.03.024
Publication status	Published - Sept 2014
Externally published	Yes

Keywords

Fatigue
Re-ultrasonic impact treatment
Residual stress
Ultrasonic impact damage
Welded joints

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10.1016/j.ijfatigue.2014.03.024

Cite this

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title = "Influence of re-ultrasonic impact treatment on fatigue behaviors of S690QL welded joints",

abstract = "The effects of re-ultrasonic impact treatment with different fatigue cycle intervals between two UITs on the fatigue life of S690QL cruciform welded joints were investigated. Fatigue life, residual stress, SEM micrographs of specimen cross profile, and fatigue fracture were determined. Fatigue determination results indicated that re-UIT increased the total fatigue life when the fatigue cycle interval between two UITs was appropriate. The contribution of residual stress produced by re-UIT to fatigue life was not significant at room temperature. The damages caused by UIT were confirmed with optical microscope and scanning electron microscope. Considering that UIT could close cracks, the effect of re-UIT on fatigue life strongly depended on the competition between the role of closing cracks and the formation process of new damage.",

keywords = "Fatigue, Re-ultrasonic impact treatment, Residual stress, Ultrasonic impact damage, Welded joints",

author = "Yang Liu and Dongpo Wang and Caiyan Deng and Liqian Xia and Lixing Huo and Lijun Wang and Baoming Gong",

year = "2014",

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doi = "10.1016/j.ijfatigue.2014.03.024",

language = "English",

volume = "66",

pages = "155--160",

journal = "International Journal of Fatigue",

issn = "0142-1123",

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TY - JOUR

T1 - Influence of re-ultrasonic impact treatment on fatigue behaviors of S690QL welded joints

AU - Liu, Yang

AU - Wang, Dongpo

AU - Deng, Caiyan

AU - Xia, Liqian

AU - Huo, Lixing

AU - Wang, Lijun

AU - Gong, Baoming

PY - 2014/9

Y1 - 2014/9

N2 - The effects of re-ultrasonic impact treatment with different fatigue cycle intervals between two UITs on the fatigue life of S690QL cruciform welded joints were investigated. Fatigue life, residual stress, SEM micrographs of specimen cross profile, and fatigue fracture were determined. Fatigue determination results indicated that re-UIT increased the total fatigue life when the fatigue cycle interval between two UITs was appropriate. The contribution of residual stress produced by re-UIT to fatigue life was not significant at room temperature. The damages caused by UIT were confirmed with optical microscope and scanning electron microscope. Considering that UIT could close cracks, the effect of re-UIT on fatigue life strongly depended on the competition between the role of closing cracks and the formation process of new damage.

AB - The effects of re-ultrasonic impact treatment with different fatigue cycle intervals between two UITs on the fatigue life of S690QL cruciform welded joints were investigated. Fatigue life, residual stress, SEM micrographs of specimen cross profile, and fatigue fracture were determined. Fatigue determination results indicated that re-UIT increased the total fatigue life when the fatigue cycle interval between two UITs was appropriate. The contribution of residual stress produced by re-UIT to fatigue life was not significant at room temperature. The damages caused by UIT were confirmed with optical microscope and scanning electron microscope. Considering that UIT could close cracks, the effect of re-UIT on fatigue life strongly depended on the competition between the role of closing cracks and the formation process of new damage.

KW - Fatigue

KW - Re-ultrasonic impact treatment

KW - Residual stress

KW - Ultrasonic impact damage

KW - Welded joints

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DO - 10.1016/j.ijfatigue.2014.03.024

M3 - Article

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SN - 0142-1123

VL - 66

SP - 155

EP - 160

JO - International Journal of Fatigue

JF - International Journal of Fatigue

ER -

Influence of re-ultrasonic impact treatment on fatigue behaviors of S690QL welded joints

Abstract

Keywords

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