Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 07, 2017 - October 09, 2017
Fatigue test was conducted in a Fe-30Mn-4Si-2Al (in mass%) alloy, which has the longest low cycle fatigue life among the Fe - 30 Mn - (6 - x) Si - x Al alloys (x = 1, 2, 3, 4, 5, 6) to investigate fatigue characteristics and accumulative plastic strains. The obtained results are shown below. The fatigue life of the Fe-30Mn-4Si-2Alalloy is the longest in all the strain ranges as compared with the Fe-28Mn-6Si5Cr-0.5NbC shape memory alloy and the SUS 304 steel. In particular, it has a long life in test of high strain amplitude. The εpa-Nf characteristics of the Fe-30Mn-4Si-2Alalloy show a straight relationship. The result that the Manson-Coffin rule holds was obtained. It is remarkable that the corresponding fatigue ductility coefficient and exponent of the alloy are extremely high(Cp = 5.62, Kp = 0.72) as compared with conventional alloys and steels.
