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ON CRACK INITIATION LIFE DURING LOW CYCLE FATIGUE
Author(s) -
Jun Din,
Jianchen Qing
Publication year - 1989
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.1460-2695.1989.tb00568.x
Subject(s) - materials science , low cycle fatigue , fatigue testing , scanning electron microscope , grain size , metallurgy , fracture mechanics , refining (metallurgy) , grain boundary , structural engineering , composite material , microstructure , engineering
— A new method of investigating life to crack initiation during low cycle fatigue, which combines hour‐glass shape specimen testing with scanning electron‐microscopy observations, was introduced in the paper. The effect of grain size on low cycle fatigue crack initiation life of 37CrNi3MoV steel and the propagation of cracks in this multi‐phase steel was studied. Results show that refining the grain size can increase fatigue initiation lifetime.