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TECHNICAL PAPERS

Effect of Elastic Accommodation on Diffusion-Controlled Cavity Growth in Metals

[+] Author and Article Information
R. Mohan

Rouge Steel Company, 3001 Miller Rd., Dearborn, MI 48121

J. Zhang, F. W. Brust

Battelle, 505 King Avenue, Columbus, OH 43201-2693

J. Eng. Mater. Technol 122(3), 294-299 (Mar 14, 2000) (6 pages) doi:10.1115/1.482800 History: Received December 28, 1999; Revised March 14, 2000
Copyright © 2000 by ASME
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References

Figures

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Periodically spaced spherical cavities along the grain boundary. The hatched region defines the axisymmetric unit cell: (a) plane perpendicular to grain boundary, (b) plane parallel to grain boundary.
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Finite element mesh of the axisymmetric model
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Variation of void growth rate with normalized time for several a/b in γ-Fe. Note that the growth rates reach a steady state after the elastic transient.
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Temporal variation ratio of void growth rate predicted by FEM and by the Hull-Rimmer model for several a/b=0.1 in γ-Fe. Inset shows the transition from transient to steady state.
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Temporal changes in stress distribution ahead of the cavity tip along the grain boundary in γ-Fe. (a) a/b=0.01 and (b) a/b=0.1.
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Contours of axial stress normalized with far-field applied stress, σz, at four different times, t/τ. (a) 3.82E-06, (b) 2.71E-05, (c) 3.77E-05, and (d) 2.47.
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The temporal variations of void growth rates normalized with the respective rate predicted by Hull-Rimmer model for all the three metals. The time is normalized with the characteristic time given in Eq. (10).
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The temporal variations of void growth rates normalized with the respective rate predicted by Hull-Rimmer model for all the three metals. The time is normalized with the characteristic time given in Eq. (13).

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