Radiation-induced changes in the structure and mechanical properties of Fe–Mo alloy under electron irradiation

• Published in: Inorganic materials : applied research Vol. 8; no. 3; pp. 378 - 381
• Main Authors: Tsepelev, A. B., Ilyushin, A. S., Kiseleva, T. Yu, Brovkina, E. A., Melnikov, V. N.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 2017; Springer Nature B.V
• Subjects: Alloys; Annealing; Chemistry; Chemistry and Materials Science; Crystal defects; Effects of Energy Fluxes on Materials; Electron irradiation; Ferrous alloys; Industrial Chemistry/Chemical Engineering; Inorganic Chemistry; Materials Science; Mechanical properties; Molybdenum base alloys; Oxidation; Phase shift; Phase transitions; Radiation effects; Softening; Solution strengthening; Spinel; X-ray diffraction; Fe–Mo alloy; electron irradiation; structure and phase transformations; solid solution; radiation softening
• ISSN: 2075-1133; 2075-115X
• DOI: 10.1134/S2075113317030236

The X-ray diffraction method is used to study radiation-induced changes in the structure and phase state of a model Fe–5% Mo alloy after electron irradiation at room temperature and 400°C. The observed radiation-induced softening of the alloy is explained by a decrease in the Mo concentration in solid solution and an increase in the number of lattice defects. This conclusion is confirmed by the shift of the 200 diffraction maximum toward larger angles and its broadening. Irradiation leads to the oxidation of the alloy, and additional annealing at 400°C causes the formation of spinel Fe
2
MoO
4
and alloy strengthening.