In situ imaging of high cycle fatigue crack growth in single crystal nickel-base superalloys by synchrotron X-radiation

Liu Liu; Naji S. Husseini; Christopher J. Torbet; Divine P. Kumah; Roy Clarke; Tresa M. Pollock; J. Wayne Jones

doi:10.1115/1.2840966

In situ imaging of high cycle fatigue crack growth in single crystal nickel-base superalloys by synchrotron X-radiation

Liu Liu^*, Naji S. Husseini, Christopher J. Torbet, Divine P. Kumah, Roy Clarke, Tresa M. Pollock, J. Wayne Jones

^*Corresponding author for this work

University of Michigan, Ann Arbor

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

24 Citations (Scopus)

Abstract

A novel X-ray synchrotron radiation approach is described for real-time imaging of the initiation and growth of fatigue cracks during ultrasonic fatigue (f=20 kHz). We report here on new insights on single crystal nickel-base superalloys gained with this approach. A portable ultrasonic fatigue instrument has been designed that can be installed at a high-brilliance X-ray beamline. With a load line and fatigue specimen configuration, this instrument produces stable fatigue crack propagation for specimens as thin as 150 μm. The in situ cyclic loading/imaging system has been used initially to image real-time crystallographic fatigue and crack growth under positive mean axial stress in the turbine blade alloy CMSX-4.

Original language	English
Pages (from-to)	210081-210086
Number of pages	6
Journal	Journal of Engineering Materials and Technology
Volume	130
Issue number	2
DOIs	https://doi.org/10.1115/1.2840966
Publication status	Published - Apr 2008
Externally published	Yes

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title = "In situ imaging of high cycle fatigue crack growth in single crystal nickel-base superalloys by synchrotron X-radiation",

abstract = "A novel X-ray synchrotron radiation approach is described for real-time imaging of the initiation and growth of fatigue cracks during ultrasonic fatigue (f=20 kHz). We report here on new insights on single crystal nickel-base superalloys gained with this approach. A portable ultrasonic fatigue instrument has been designed that can be installed at a high-brilliance X-ray beamline. With a load line and fatigue specimen configuration, this instrument produces stable fatigue crack propagation for specimens as thin as 150 μm. The in situ cyclic loading/imaging system has been used initially to image real-time crystallographic fatigue and crack growth under positive mean axial stress in the turbine blade alloy CMSX-4.",

author = "Liu Liu and Husseini, \{Naji S.\} and Torbet, \{Christopher J.\} and Kumah, \{Divine P.\} and Roy Clarke and Pollock, \{Tresa M.\} and \{Wayne Jones\}, J.",

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AU - Liu, Liu

AU - Husseini, Naji S.

AU - Torbet, Christopher J.

AU - Kumah, Divine P.

AU - Clarke, Roy

AU - Pollock, Tresa M.

AU - Wayne Jones, J.

PY - 2008/4

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N2 - A novel X-ray synchrotron radiation approach is described for real-time imaging of the initiation and growth of fatigue cracks during ultrasonic fatigue (f=20 kHz). We report here on new insights on single crystal nickel-base superalloys gained with this approach. A portable ultrasonic fatigue instrument has been designed that can be installed at a high-brilliance X-ray beamline. With a load line and fatigue specimen configuration, this instrument produces stable fatigue crack propagation for specimens as thin as 150 μm. The in situ cyclic loading/imaging system has been used initially to image real-time crystallographic fatigue and crack growth under positive mean axial stress in the turbine blade alloy CMSX-4.

AB - A novel X-ray synchrotron radiation approach is described for real-time imaging of the initiation and growth of fatigue cracks during ultrasonic fatigue (f=20 kHz). We report here on new insights on single crystal nickel-base superalloys gained with this approach. A portable ultrasonic fatigue instrument has been designed that can be installed at a high-brilliance X-ray beamline. With a load line and fatigue specimen configuration, this instrument produces stable fatigue crack propagation for specimens as thin as 150 μm. The in situ cyclic loading/imaging system has been used initially to image real-time crystallographic fatigue and crack growth under positive mean axial stress in the turbine blade alloy CMSX-4.

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JO - Journal of Engineering Materials and Technology

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ER -

In situ imaging of high cycle fatigue crack growth in single crystal nickel-base superalloys by synchrotron X-radiation

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