Corrosion–Fatigue Fracture of the Ultrafine-Grained PT-7M Titanium Alloy Fabricated by Rotary Forging
В. Н. ЧувильдеевNizhny Novgorod State University, 603600, Nizhny Novgorod, RussiaН. Н. БерендеевNizhny Novgorod State University, 603600, Nizhny Novgorod, RussiaА. А. МурашовNizhny Novgorod State University, 603600, Nizhny Novgorod, RussiaВ. И. КопыловNizhny Novgorod State University, 603600, Nizhny Novgorod, RussiaА. В. НохринNizhny Novgorod State University, 603600, Nizhny Novgorod, RussiaM. Yu. GryaznovNizhny Novgorod State University, 603600, Nizhny Novgorod, RussiaK. V. LikhnitskiiNizhny Novgorod State University, 603600, Nizhny Novgorod, RussiaN. Yu. TabachkovaNational University of Science and Technology MISiS, 119049, Moscow, RussiaE. A. GalaevaNizhny Novgorod State University, 603600, Nizhny Novgorod, RussiaД. Н. КотковNizhny Novgorod State University, 603600, Nizhny Novgorod, RussiaА. М. БахметьевT. V. TryaevМ. M. MyshlyaevBaikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, 119991, Moscow, Russia
ABI
Аннотация
The corrosion–fatigue fracture of an ultrafine-grained Ti–2.2Al–2.5Zr pseudo-α titanium alloy (PT-7M alloy), which is used in atomic power engineering, is studied. The formation of an ultrafine-grained structure by rotary forging is found to increase the corrosion–fatigue strength. The parameters in Basquin’s equation are determined, and the slope of the σa–log N fatigue curve is shown to nonmonotonically depend on the temperature of annealing of the ultrafine-grained alloy.
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