0
Journal of Engineering Materials and Technology | Volume 130 | Issue 2 | Research Paper
Research Papers

In Situ Imaging of High Cycle Fatigue Crack Growth in Single Crystal Nickel-Base Superalloys by Synchrotron X-Radiation

[+] Author and Article Information
Liu Liu, Christopher J. Torbet, Tresa M. Pollock

Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109

Naji S. Husseini, Divine P. Kumah, Roy Clarke

Applied Physics Program, University of Michigan, Ann Arbor, MI 48109

J. Wayne Jones

Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109jonesjwa@umich.edu

J. Eng. Mater. Technol 130(2), 021008 (Mar 12, 2008) (6 pages) doi:10.1115/1.2840966 History: Received August 09, 2007; Revised November 29, 2007; Published March 12, 2008
Article
References
Figures

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=20kHz). 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 150μm. 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.
FIGURES IN THIS ARTICLE
<>
Copyright © 2008 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
+(a) Microstructure features associated with nickel-base superalloy single crystals and (b) fatigue damage resulting from cyclic strain localization at carbides
View Large  |  Save Figure  |  Download Slide (.ppt)
(a) Microstructure features associated with nickel-base superalloy single crystals and (b) fatigue damage resulting from cyclic strain localization at carbides
Figure 1

(a) Microstructure features associated with nickel-base superalloy single crystals and (b) fatigue damage resulting from cyclic strain localization at carbides

Grahic Jump Location
+Overview and details of portable ultrasonic fatigue instrument: (a) load frame showing specimen location, (b) detail of “carrier” specimen showing center hole for X-ray beam transmission and attachment locations for the microspecimen, and (c) microspecimen installed on the carrier
View Large  |  Save Figure  |  Download Slide (.ppt)
Overview and details of portable ultrasonic fatigue instrument: (a) load frame showing specimen location, (b) detail of “carrier” specimen showing center hole for X-ray beam transmission and attachment locations for the microspecimen, and (c) microspecimen installed on the carrier
Figure 2

Overview and details of portable ultrasonic fatigue instrument: (a) load frame showing specimen location, (b) detail of “carrier” specimen showing center hole for X-ray beam transmission and attachment locations for the microspecimen, and (c) microspecimen installed on the carrier

Grahic Jump Location
+Details of finite element method (FEM) analysis of strain development in microspecimen during loading of the carrier specimen. The colored band contour represents the tensile stress S22 with unit MPa.
View Large  |  Save Figure  |  Download Slide (.ppt)
Details of finite element method (FEM) analysis of strain development in microspecimen during loading of the carrier specimen. The colored band contour represents the tensile stress S22 with unit MPa.
Figure 3

Details of finite element method (FEM) analysis of strain development in microspecimen during loading of the carrier specimen. The colored band contour represents the tensile stress S22 with unit MPa.

Grahic Jump Location
+Installation of the portable ultrasonic fatigue instrument at the beamline: (a) schematic showing the imaging configuration and (b) photograph of installation on the optical bench
View Large  |  Save Figure  |  Download Slide (.ppt)
Installation of the portable ultrasonic fatigue instrument at the beamline: (a) schematic showing the imaging configuration and (b) photograph of installation on the optical bench
Figure 4

Installation of the portable ultrasonic fatigue instrument at the beamline: (a) schematic showing the imaging configuration and (b) photograph of installation on the optical bench

Grahic Jump Location
+Images of a fatigue crack produced by ultrasonic fatigue: (a) merged optical images to show relative intersections of the crack with front and back specimen surface and (b) synchrotron X-ray image of the same fatigue crack
View Large  |  Save Figure  |  Download Slide (.ppt)
Images of a fatigue crack produced by ultrasonic fatigue: (a) merged optical images to show relative intersections of the crack with front and back specimen surface and (b) synchrotron X-ray image of the same fatigue crack
Figure 5

Images of a fatigue crack produced by ultrasonic fatigue: (a) merged optical images to show relative intersections of the crack with front and back specimen surface and (b) synchrotron X-ray image of the same fatigue crack

Grahic Jump Location
+Representative fatigue crack growth behavior observed in the microspecimen during ultrasonic fatigue: (a) crack length versus number of cycles and (b) crack growth rate versus stress intensity factor range
View Large  |  Save Figure  |  Download Slide (.ppt)
Representative fatigue crack growth behavior observed in the microspecimen during ultrasonic fatigue: (a) crack length versus number of cycles and (b) crack growth rate versus stress intensity factor range
Figure 6

Representative fatigue crack growth behavior observed in the microspecimen during ultrasonic fatigue: (a) crack length versus number of cycles and (b) crack growth rate versus stress intensity factor range

Grahic Jump Location
+In situ synchrotron X-ray images of fatigue crack growth during ultrasonic fatigue
View Large  |  Save Figure  |  Download Slide (.ppt)
In situ synchrotron X-ray images of fatigue crack growth during ultrasonic fatigue
Figure 7

In situ synchrotron X-ray images of fatigue crack growth during ultrasonic fatigue

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Start-Up, Shutdown, and Lay-Up
Consensus on Pre-Commissioning Stages for Cogeneration and Combined Cycle Power Plants
Understanding the Problem
Design and Application of the Worm Gear> Chapter 12
Fatigue Analysis in the Connecting Rod of MF285 Tractor by Finite Element Method
International Conference on Advanced Computer Theory and Engineering, 4th (ICACTE 2011)
Insulating Properties of W-Doped Ga2O3 Films Grown on Si Substrate for Low-K Applications
International Conference on Advanced Computer Theory and Engineering, 4th (ICACTE 2011)
Relationship Between Tool Deterioration and Cutting Force During Milling of a Nickel-Based Superalloy Using Cemented Carbide Tool
Advances in Multidisciplinary Engineering
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In