Open AccessExperimental study on crack propagation of stainless steel 304 material under amplitude overloads
Author(s) -
A. Hartanto,
Roziq Himawan,
Hadi Sutanto
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/541/1/012021
Subject(s) - materials science , amplitude , crack closure , fracture mechanics , structural engineering , stress intensity factor , composite material , transient (computer programming) , stress (linguistics) , cyclic stress , dynamic stress , crack growth resistance curve , stress concentration , dynamic loading , engineering , physics , linguistics , philosophy , quantum mechanics , computer science , operating system
Fatigue mechanisms caused by dynamic loadings starts with cracks that occurred in a material. Under conditions such as transient conditions, an earthquake or instantaneous external loads, some parts of nuclear reactor that initially receive operating loads can be overloaded. The purpose of this research is to investigate the change of crack propagation in stainless steel 304 material related with amplitude overloads. The crack propagation test used the axial dynamic testing with the maximum stress (σ max ) of 145 MPa, stress ratio R = 0.1 and over loading ratio (OVR) of 1.5, 1.75, 2. The results showed that the amplitude overloads caused the crack to propagate slowly as the crack tip formed a branch. The higher crack growth rate also showed the higher stress intensity factors in the crack tip.