Near threshold fatigue crack growth behaviour of a high strength steel: the effect of prior austenitic grain size

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Publication Type Journal Article
School or College College of Mines & Earth Sciences
Department Metallurgical Engineering
Creator Chandran, Ravi
Other Author Dwarkadasa, Eshwarahalli S.; Kishore
Title Near threshold fatigue crack growth behaviour of a high strength steel: the effect of prior austenitic grain size
Date 1987
Description Near threshold fatigue crack propagation behaviour of a high strength steel under different prior austenitic grain sizes with constant tensile properties was investigated. Attention has been paid to the observation of facture modes at thresh-; old in different grain sizes. The observations indicate that three distinct modes of fracture can occur at threshold depending on the resistance offered by the grain boundary to the plastic relaxation of crack tip stress state by transgranular crystallographic slip. A low value of threshold was encountered in fine grain sizes due to limited slip distance where; as higher thresholds were seen in coarse grain sizes where dislocation pile-up and extensive plastic relaxation a t the: crack tip can occur to give rise to crack path tortuosity and crack blunting respectively.
Type Text
Publisher Hanser Publishers
Volume 78
Issue 1
First Page 32
Last Page 38
Subject High strength steel; Crack growth; Austenitic grain size
Subject LCSH Steel, High strength -- Cracking; Steel, High strength -- Fatigue
Language eng
Bibliographic Citation Ravichandran, K. S., Dwarkadasa, E. S., & Kishore. (1987). Near threshold fatigue crack growth behaviour of a high strength steel: the effect of prior austenitic grain size. Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques, 78(1), 32-8.
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Identifier ir-main,8680
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Setname ir_uspace
ID 704270
Reference URL https://collections.lib.utah.edu/ark:/87278/s6j96qn2
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