Micromechanical study of the warm-prestress (WPS) effect

Blumenauer, H.; Krempe, M.; Eichler, B; Ude, J.

doi:10.1051/jp4:1998805

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1998

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“…The compressive residual stresses make it more difficult to attain the critical fracture stress over the characteris~ tic length Xm which is the required process zone to trigger cleavage fracture directly at the crack tip (Fig.5) [4,5].…”

Section: Resultsmentioning

confidence: 99%

Residual stresses at a blunted crack tip

Blumenauer¹,

Krempe²,

Ude³

1998

Mater Sci

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The tip of a blunted crack is regarded as a stress concentrator of a special kind. The investigations are performed on compact specimens made of 10MnMoNi5-5 high-ductility bainitic steel with a computerized X-ray diffractometer. The distribution of compressive residual stresses near the crack tip is established after its blunting under the conditions of plastic deformation. It is shown that these stresses should be taken into account in analyzing the local fracture of the material.

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Section: Resultsmentioning

confidence: 99%