The fracture resistance of sintered steel

Yan Bin Ke; Brian Cotterell; Yiu Wing Mai

doi:10.1016/0921-5093(89)90096-8

The fracture resistance of sintered steel

Yan Bin Ke, Brian Cotterell, Yiu Wing Mai

Research output: Journal article publication › Journal article › Academic research › peer-review

5 Citations (Scopus)

Abstract

The fracture resistance of sintered steel is shown to increase with crack growth. The formation of a dilatant microcracked fracture process zone which, when left in the wake of the propagating crack, creates a negative stress intensity factor, is demonstrated as the probable cause of the increase in resistance. It is shown that the K_R curve for sintered steels can be obtained in the same way as K_R curves for fully dense metals except that a fatigue-sharpened notch is not necessary. Valid K_R curves are shown to be obtainable provided that the notch root radius is sharper than about three times the pore size.

Original language	English
Pages (from-to)	149-156
Number of pages	8
Journal	Materials Science and Engineering A
Volume	117
Issue number	C
DOIs	https://doi.org/10.1016/0921-5093(89)90096-8
Publication status	Published - Sept 1989
Externally published	Yes

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/0921-5093(89)90096-8

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abstract = "The fracture resistance of sintered steel is shown to increase with crack growth. The formation of a dilatant microcracked fracture process zone which, when left in the wake of the propagating crack, creates a negative stress intensity factor, is demonstrated as the probable cause of the increase in resistance. It is shown that the KR curve for sintered steels can be obtained in the same way as KR curves for fully dense metals except that a fatigue-sharpened notch is not necessary. Valid KR curves are shown to be obtainable provided that the notch root radius is sharper than about three times the pore size.",

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AU - Cotterell, Brian

AU - Mai, Yiu Wing

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AB - The fracture resistance of sintered steel is shown to increase with crack growth. The formation of a dilatant microcracked fracture process zone which, when left in the wake of the propagating crack, creates a negative stress intensity factor, is demonstrated as the probable cause of the increase in resistance. It is shown that the KR curve for sintered steels can be obtained in the same way as KR curves for fully dense metals except that a fatigue-sharpened notch is not necessary. Valid KR curves are shown to be obtainable provided that the notch root radius is sharper than about three times the pore size.

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U2 - 10.1016/0921-5093(89)90096-8

DO - 10.1016/0921-5093(89)90096-8

M3 - Journal article

AN - SCOPUS:0024735096

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VL - 117

SP - 149

EP - 156

JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

IS - C

ER -

The fracture resistance of sintered steel

Abstract

ASJC Scopus subject areas

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