The effect of core traction on the image force of a screw dislocation

Zhang Tong-Yi; J. C.M. Li

doi:10.1016/0921-5093(90)90284-A

The effect of core traction on the image force of a screw dislocation

Zhang Tong-Yi^*
, J. C.M. Li

^*Corresponding author for this work

Research output: Contribution to journal › Journal Article › peer-review

5 Citations (Scopus)

Abstract

The image force exerted on a screw dislocation near a planar or cylindrical free surface or an elliptical hole is usually smaller than that computed without including the core traction (or effectively regarding the core size as zero). For a screw dislocation emitted from a crack tip, the screw dislocation can be repelled by its images. This questions the critical force criterion for the emission of a dislocation from a crack tip. A criterion using zero activation energy is suggested and compared with the critical force criterion.

Original language	English
Pages (from-to)	201-206
Number of pages	6
Journal	Materials Science and Engineering: A
Volume	123
Issue number	2
DOIs	https://doi.org/10.1016/0921-5093(90)90284-A
Publication status	Published - Feb 1990
Externally published	Yes

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10.1016/0921-5093(90)90284-A

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title = "The effect of core traction on the image force of a screw dislocation",

abstract = "The image force exerted on a screw dislocation near a planar or cylindrical free surface or an elliptical hole is usually smaller than that computed without including the core traction (or effectively regarding the core size as zero). For a screw dislocation emitted from a crack tip, the screw dislocation can be repelled by its images. This questions the critical force criterion for the emission of a dislocation from a crack tip. A criterion using zero activation energy is suggested and compared with the critical force criterion.",

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N2 - The image force exerted on a screw dislocation near a planar or cylindrical free surface or an elliptical hole is usually smaller than that computed without including the core traction (or effectively regarding the core size as zero). For a screw dislocation emitted from a crack tip, the screw dislocation can be repelled by its images. This questions the critical force criterion for the emission of a dislocation from a crack tip. A criterion using zero activation energy is suggested and compared with the critical force criterion.

AB - The image force exerted on a screw dislocation near a planar or cylindrical free surface or an elliptical hole is usually smaller than that computed without including the core traction (or effectively regarding the core size as zero). For a screw dislocation emitted from a crack tip, the screw dislocation can be repelled by its images. This questions the critical force criterion for the emission of a dislocation from a crack tip. A criterion using zero activation energy is suggested and compared with the critical force criterion.

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UR - https://openalex.org/W2075516679

U2 - 10.1016/0921-5093(90)90284-A

DO - 10.1016/0921-5093(90)90284-A

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VL - 123

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EP - 206

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

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The effect of core traction on the image force of a screw dislocation

Abstract

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