TY - JOUR
T1 - Effect of strain amplitude on the low-cycle fatigue behavior of a new Fe-15Mn-10Cr-8Ni-4Si seismic damping alloy
AU - Nikulin, Ilya
AU - Sawaguchi, Takahiro
AU - Kushibe, Atsumichi
AU - Inoue, Yasuhiko
AU - Otsuka, Hiroaki
AU - Tsuzaki, Kaneaki
N1 - Funding Information:
This work was financially supported by the New Energy and Industrial Technology Development Organization (NEDO) ( 06A25005d ) and Grant-in-Aid for Scientific Research Fund (B) (No. 20360318 ) and (A) (No. 25249099 ) from the Japan Society for the Promotion of Science (JSPS). We would like to acknowledge the Materials Manufacturing and Engineering Station, NIMS, for the materials processing.
Publisher Copyright:
© 2016 Elsevier Ltd.
PY - 2016/7/1
Y1 - 2016/7/1
N2 - The low-cycle fatigue (LCF) properties and post-fatigue microstructure of a Fe-15Mn-10Cr-8Ni-4Si austenitic alloy were investigated under an axial strain control mode with total strain amplitudes, Δεt/2, ranging from 2.5 × 10-3 to 2 × 10-2. The fatigue resistance of the alloy was described by Coffin-Manson's and Basquin's relationships, and the corresponding fatigue parameters were evaluated. In addition, the Masing behavior, which is associated with a constant deformation mode during fatigue, was revealed at the examined strain amplitudes. Microstructural observations of the fatigue fractured samples showed that the strain induced ε-martensitic transformation accompanied by a planar slip of the Shockley partial dislocations in the austenite is the main deformation mode controlling the fatigue behavior of the studied alloy at Δεt/2 < 2 × 10-2. However, at Δεt/2 = 2 × 10-2, the formation of a cell structure was found in the austenite in addition to ε-martensitic transformation. The LCF resistance of the alloy was compared with conventional Cr-Ni austenitic stainless steels, ferrous base TRIP and TWIP steels and low yield point damping steels. It was found that at the studied strain amplitudes the alloy possessed a higher LCF resistance compared to conventional Fe-base alloys and steels. Remarkably, the fatigue ductility coefficient, εf′, of the studied alloy is 1.3-6 times higher than that of the stainless steels because of a cyclic deformation-induced ε-martensitic transformation. The results showed that the ε-martensitic transformation that occurred in the studied alloy during LCF is the main reason for the improved LCF resistance.
AB - The low-cycle fatigue (LCF) properties and post-fatigue microstructure of a Fe-15Mn-10Cr-8Ni-4Si austenitic alloy were investigated under an axial strain control mode with total strain amplitudes, Δεt/2, ranging from 2.5 × 10-3 to 2 × 10-2. The fatigue resistance of the alloy was described by Coffin-Manson's and Basquin's relationships, and the corresponding fatigue parameters were evaluated. In addition, the Masing behavior, which is associated with a constant deformation mode during fatigue, was revealed at the examined strain amplitudes. Microstructural observations of the fatigue fractured samples showed that the strain induced ε-martensitic transformation accompanied by a planar slip of the Shockley partial dislocations in the austenite is the main deformation mode controlling the fatigue behavior of the studied alloy at Δεt/2 < 2 × 10-2. However, at Δεt/2 = 2 × 10-2, the formation of a cell structure was found in the austenite in addition to ε-martensitic transformation. The LCF resistance of the alloy was compared with conventional Cr-Ni austenitic stainless steels, ferrous base TRIP and TWIP steels and low yield point damping steels. It was found that at the studied strain amplitudes the alloy possessed a higher LCF resistance compared to conventional Fe-base alloys and steels. Remarkably, the fatigue ductility coefficient, εf′, of the studied alloy is 1.3-6 times higher than that of the stainless steels because of a cyclic deformation-induced ε-martensitic transformation. The results showed that the ε-martensitic transformation that occurred in the studied alloy during LCF is the main reason for the improved LCF resistance.
UR - http://www.scopus.com/inward/record.url?scp=84962230494&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84962230494&partnerID=8YFLogxK
U2 - 10.1016/j.ijfatigue.2016.03.021
DO - 10.1016/j.ijfatigue.2016.03.021
M3 - Article
AN - SCOPUS:84962230494
SN - 0142-1123
VL - 88
SP - 132
EP - 141
JO - International Journal of Fatigue
JF - International Journal of Fatigue
ER -