Open AccessStudy on Plastic Deformation Zone of Titanium Alloy
Author(s) -
Pengran Guo,
Yongqing Zhang,
Guoyu Jia,
Hong Qiu,
Hongmiao Hou,
Hao Pan,
Y. Q. Zhang,
D. X. Liu
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1347/1/012061
Subject(s) - lamellar structure , materials science , equiaxed crystals , crack closure , fracture mechanics , deformation (meteorology) , crack growth resistance curve , composite material , titanium alloy , crack tip opening displacement , titanium aluminide , alloy , intermetallic
During the crack propagation, crack tip contains stress odd singularity and has specific yield range. As the cycling loading continuing, the crack grows in the plastic zone. So the plastic zone is crucial to crack propagation action. In this paper, the crack propagation route was observed in different microstrctures, the deformation characteristic of plastic zone was analyzed for equiaxed structure and lamellar structure. The results show that crack propagation path is more straighter in equiaxed structure than that in lamellar structure. There were more tiny cracks near the crack surface in the lamellar structure during the crack growth, which shows that lamellar structure has a bigger plastic zone during the deformation.The plastic deformation need absorb the energy, which hinders the crack propagation.