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A STUDY OF SHORT FATIGUE CRACK GROWTH BEHAVIOUR IN TITANIUM ALLOY IMI 685
Author(s) -
BROWN C. W.,
HICKS M. A.
Publication year - 1983
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/j.1460-2695.1983.tb01139.x
Subject(s) - materials science , paris' law , crack closure , titanium alloy , microstructure , cleavage (geology) , fracture (geology) , crack growth resistance curve , fatigue testing , metallurgy , stress concentration , alloy , replication (statistics) , composite material , growth rate , structural engineering , fracture mechanics , geometry , mathematics , engineering , statistics
— The fatigue growth of short cracks in coarse grained IMI 685, having an aligned a microstructure, has been monitored using a two stage replication technique. Crack growth rates are presented in terms of the failure mechanism and compared with standard data obtained from through cracked, compact tension specimens. The maximum difference, of up to four orders of magnitude, between long and short crack growth rates is associated with separation along specific crystallographic planes resulting in a cleavage‐like fracture appearance. The rate of short crack growth is also shown to be dependent on applied stress and a dwell at maximum load during the fatigue cycle.