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RATE‐DEPENDENT DEFORMATION AND FRACTURE OF α‐TITANIUM
Author(s) -
Smith D. J.,
Jones R. L.
Publication year - 1991
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.1460-2695.1991.tb00007.x
Subject(s) - materials science , creep , composite material , deformation (meteorology) , crack growth resistance curve , constant (computer programming) , displacement (psychology) , tension (geology) , crack tip opening displacement , fracture (geology) , stress (linguistics) , enhanced data rates for gsm evolution , crack closure , yield (engineering) , stress relaxation , relaxation (psychology) , structural engineering , fracture mechanics , ultimate tensile strength , psychology , telecommunications , social psychology , linguistics , philosophy , computer science , engineering , psychotherapist , programming language
Aspects of combined rate‐dependent deformation and crack growth in α‐titanium at room temperature are examined. Results are presented for tests carried out on pre‐cracked three point loaded single edge notch bend and compact tension specimens subjected to constant crack opening displacement rates and constant load. Curves of the ratio of the reference stress to the yield stress as a function of the ratio of the plastic displacement to specimen width are found to be different for different rates. The stress difference between continuously loaded curves and curves obtained from load relaxation tests (“relaxed” curves) is found to be similar to uniaxial results. Earlier uniaxial tests show that the “relaxed” curve represents a boundary below which no further creep takes place. The pre‐cracked specimen constant load curves cross the “relaxed” curve, even though the contribution from crack growth to the overall deformation is found to be small. Sustained load crack growth is observed to take place under contained yielding conditions and the sustained load resistance curves are found to be different for different reference stresses.