Short crack coalescence and growth in 316 stainless steel subjected to cyclic and time dependent deformation
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 & Fracture of Engineering Materials and Structures, 18, (12), 1423-1441. (doi:10.1111/j.1460-2695.1995.tb00866.x).
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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.
|Keywords:||creep-fatigue, short crack, crack coalescence|
|Subjects:||T Technology > TN Mining engineering. Metallurgy|
|Divisions:||University Structure - Pre August 2011 > School of Engineering Sciences
|Date Deposited:||12 Jan 2007|
|Last Modified:||01 Jun 2011 02:17|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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