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Short crack coalescence and growth in 316 stainless steel subjected to cyclic and time dependent deformation

Record type: Article

A study has been undertaken into short crack growth behaviour of AISI type 316 stainless steel under creep-fatigue conditions at 550 degrees C within the high strain range of 0.9 to 2.5% and including a 60 min hold-time. During the high-temperature, reverse-bending tests, surface crack initiation and growth on both the tensile-hold and the compressive-hold sides of circular-section specimens were monitored by means of a plastic replication technique. Detailed analysis revealed that under creep-fatigue conditions, the initiation and growth behaviour of many individual cracks and their subsequent coalescence to form a major Stage II (tensile) crack was the dominant feature in the failure process. A life prediction model is proposed which incorporates the process of short crack coalescence. Satisfactory predictions of creep-fatigue lifetimes are derived from the model.

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Citation

Gao, N., Brown, M.W. and Miller, K.J. (1995) Short crack coalescence and growth in 316 stainless steel subjected to cyclic and time dependent deformation Fatigue and Fracture of Engineering Materials and Structures, 18, (12), pp. 1423-1441. (doi:10.1111/j.1460-2695.1995.tb00866.x).

More information

Published date: 1995
Keywords: creep-fatigue, short crack, crack coalescence

Identifiers

Local EPrints ID: 43154
URI: http://eprints.soton.ac.uk/id/eprint/43154
ISSN: 8756-758X
PURE UUID: 7775b4a8-52d2-4b8d-95de-897758bb3e19

Catalogue record

Date deposited: 12 Jan 2007
Last modified: 17 Jul 2017 15:19

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Contributors

Author: N. Gao
Author: M.W. Brown
Author: K.J. Miller

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