Internal friction in Invar Fe-35 % Ni alloy after combined SPD by hydroextrusion and drawing

• Дата: 2014
• Автори: Nadutov, V.M., Vashchuk, D.L., Pilipenko, A.N., Davidenko, O.A., Beloshenko, V.A.
• Формат: Стаття
• Мова: English
• Опубліковано: НТК «Інститут монокристалів» НАН України 2014
• Назва видання: Functional Materials
• Теми: Characterization and properties
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/120401
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Internal friction in Invar Fe-35 % Ni alloy after combined SPD by hydroextrusion and drawing / V.M. Nadutov, D.L. Vashchuk, A.N. Pilipenko, O.A. Davidenko, V.A. Beloshenko // Functional Materials. — 2014. — Т. 21, № 1. — С. 52-58. — Бібліогр.: 22 назв. — англ.

The temperature dependence of internal friction on frequency of ~3 Hz and ~60 Hz were studied in Invar Fe-35.0% Ni-0.49% Mn-0.03%C alloy after annealing at 1373 K and combined severe plastic deformation (SPD) by hydroextrusion and subsequent drawing with the total degree of accumulated deformation ε Σ = 4.69. The reduction of the relaxation IF peak intensity is observed in deformed sample of the alloy at ~380 K (the activation energy 0.82-0.93 eV) due to decreasing of mechanical and magnetomechanical relaxation losses the contribution of which is renewed after ageing of the deformed alloy. The damping growth nearby temperatures 780-820 K after combined SPD and partial its reduction after ageing of the alloy were revealed. The estimated activation energy of the relaxation process is 1.82-1.97 eV.