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Abstract

A model for intergranular crack growth is developed in which atoms are deposited preferentially in a zone ahead of the crack tip. The crack remains sharp provided the length of the diffusive plating zone is much larger than the crack width. The crack velocity depends on a high power of the applied stress. Instabilities in the crack face which develop into finger-like cavity growth are stabilized when surface diffusion exceeds grain boundary diffusion. The crack growth mechanism is compared with observations in a stainless steel. It is concluded that diffusive crack growth may be rate-controlling in this material at crack growth rates below 10⁻¹² m s⁻¹ at 750°C, provided diffusive processes are not inhibited.

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References

HEALD

P. T.

and WILLIAMS

J. A.

: Philos. Mag., 1970, 22, 1095.

HULL

and RIMMER

: ibid., 1959, 4, 673.

WEERTMAN

: Scr. Metall., 1973,7, 1129.

SPEIGHT

M. V.

and BEERE

: Met. Scl., 1975, 9, 190.

CANE

B. J.

and GREENWOOD

G. W.

: ibid., 1975, 9, 55.

CHUANG

T. J.

: thesis, Brown University, Providence, R. I., 1974.

VITEK

: Acta Metall., 1978, 9, 1345.

BEERE

and SPEIGHT

MV.

Met. Sci., 1978, 12, 172.

CHUANG

T. J.

and RICE

J. R.

: Acta Metall., 1973, 21, 1625.

10.

WINGROVE

A. L.

and TAPLIN

D. M. R.

: J. Mater. Scl., 1969,4, 789.

11.

FIELDS

R. J.

and ASHBY

M. F.

: Philos. Mag., 1976, 33, 33.

12.

CROSSLAND

I. G.

and CLAY

B. D.

: Acta Metall., 1977, 25, 929,

13.

MUKHER

A. K.

.TEE, J. E. BIRD, and J. E. DORN: Trans. ASM, 1969, 62, 155.

14.

McLAUCHLIN

I. R.

: Berkeley Nuclear Laboratories, Internal Report RD/B/N 3441.

15.

SPEIGHT

M. V.

, BEERE

, and ROBERTS

: Mater. Scl. Eng., to be published.

16.

NICHOLSON

R. D.

and FORMBY

C. L.

: Int. J. Fract., 1975, 11, 595.

17.

BLAKELEY

J. M.

and MYKURA

: Acta Metall., 1963, 11, 399.

18.

GEGUZIN

Ya. E.

, KOVALOV

G. N.

, and RATNER

A. M.

: Phys. Met. Metallogr., 1960, 10, 45.

19.

MATSUMURA

: Acta Metall., 1971, 19, 851.

20.

BURNS

, JAMES

D. W.

, and JONES

: Met. Sci. J., 1973, 7, 204.

21.

JAMES

D. W.

and LEAK

G. M.

: Philos. Mag., 1965, 12, 491.

22.

HUNTZ

A. M.

: Mem. Sci. Rev. Métall., 1973, 70, 81.

23.

SMITH

A. F.

and GIBBS

G. B.

: Met. Scl. J., 1968, 2, 47.

24.

PETERSON

N. L.

: Solid State Phys., 1968, 22.

Diffusive crack growth in plastically deforming solid

Abstract

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