Michio Shimotomai | Author | SciTechnol

Michio Shimotomai Author

mileiko@issp.ac.ru (49652) 22493 | (49652) 2249

Subjects of specialization
Fracture toughness,Creep,Molybdenum,Refractory metals

Affiliation
Institute of Solid State Physics of RAS, Chernogolovka Moscow distr., Russia

Biography

Institute of Structural Macrokinetics and Materials Science of RAS, Chernogolovka Moscow distr, Russia Composites; Internal crystallization method; Silicide fibers; Refractory metals; Molybdenum; Creep; Fracture toughness Institute of Solid State Physics of RAS, Chernogolovka Moscow distr., Russia Institute of Solid State Physics of RAS, Chernogolovka Moscow distr., Russia Institute of Solid State Physics of RAS, Chernogolovka Moscow distr., Russia

Publications

Research Article Open Access

Study of Carbon Steel by Mechanical Spectroscopy beyond the Old Limitations

Author(s):

Michio Shimotomai

A new aspect of carbon precipitates in steel is unraveled by mechanical spectroscopy. The method was applied to the study of carbide precipitation in quench-aged Fe-C alloys, mild steel, and pearlitic steel. Measurements carried out at constant temperature below room temperature (RT) down to -55^ºC have revealed a new broad beak (NBP) different from neither the Snoek nor the Snoek-Köster peaks. This peak is characterized by the Debye peak with a distribution in relaxation time. The Arrhenius plot yields a large activation energy and gigantic pre-exponential factor. The intensity of NBP increases with aging at temperatures where ε-carbide is known to precipitates. It starts to decay at aging time too early for the ε-carbid... view more»

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