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TECHNICAL PAPERS

Effects of Local Grain Orientation on Fatigue Crack Growth in Multicrystalline fcc Metallic Materials

[+] Author and Article Information
P. Peralta, N. Dellan, K. Komandur

Arizona State University, Department of Mechanical and Aerospace Engineering, Tempe, AZ 85287-6106

R. Dickerson

Los Alamos National Laboratory, MST-8. Mail Stop G755, Los Alamos, NM 87545

M. A. Jameel

Honeywell Engines and Systems, MS 503-249, Phoenix, AZ 85044

J. Eng. Mater. Technol 127(1), 23-32 (Feb 22, 2005) (10 pages) doi:10.1115/1.1836768 History: Received January 01, 2003; Revised September 14, 2004; Online February 22, 2005
Copyright © 2005 by ASME
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References

Figures

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(110) Pole figures for (a) pure Ni; (b) IN-100
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Crack length and growth rates for samples tested to failure. (a) nickel; (b) inconel. Arrows indicate locations where the crack was observed meeting a grain boundary
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Crack growth kinetics (da/dN vs ΔK) (a) nickel; (b) IN-100
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Fracture surface of a nickel sample tested to failure. (a) Low magnification view; (b) High magnification of rectangular area in (a), showing crack nucleation
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Fracture surface of an IN-100 sample tested to failure. (a) Low magnification view showing approximate locations of grain boundaries; (b) High magnification of rectangular area in (a), showing crack nucleation
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Nickel sample (Ni1) with a crack with small deviations from mode I. (a) Optical micrograph; (b) OIM map. Load axis is vertical
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IN-100 sample (IN1) with a crack with small deviations from mode I. (a) Optical micrograph; (b) Detail of crack nucleation; (c) OIM map. Load axis is vertical
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Nickel sample (Ni2) with a crack with large deviations from mode I. (a) Optical micrograph; (b) Crack nucleation detail; (c) OIM map. Load axis is vertical
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IN-100 sample (IN2) with a crack with large deviations from mode I. (a) Optical micrograph; (b) Crack nucleation detail; (c) OIM map. Load axis is vertical
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Standard stereographic triangle showing grains with noticeable crack deflections: (+) Sample Ni1, (×) Sample IN1, (*) Sample IN2. The grains with the most pronounced deflections are marked with arrows

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