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- Title
Optimization of the Medium of Thermal Treatment of GFE-1 Hafnium Alloy.
- Authors
Trush, V.; Fedirko, V.; Luk'yanenko, O.; Kovtun, K.
- Abstract
We optimize the conditions of thermochemical treatment of the plates (~ 1 mm) made of GFE-1 hafnium alloy after plastic deformation from the viewpoint of the influence of interstitial elements (oxygen) on the solid-solution hardening of the subsurface layers and the fatigue durability of the hafnium specimens subjected to symmetric pure bending. It is shown that the thermochemical treatment ( T = 850°C, τ = 2 h) performed in the oxygen-containing gaseous atmosphere at P = 1.33·10 Pa leads to the formation of a diffusion-hardened subsurface layer on the GFE-1 hafnium specimens, which increases their fatigue life (for the strain amplitude ± ε = 0.6%) as compared with the other levels of pressure of the same medium. The fracture of the specimens of GFE-1 hafnium alloy subjected to the thermochemical treatment in oxygen-containing rarefied gas atmospheres under various pressures is investigated.
- Subjects
HAFNIUM; ALLOY testing; HEAT treatment; MATERIAL plasticity; BENDING (Metalwork); FRACTURE mechanics
- Publication
Materials Science, 2017, Vol 53, Issue 2, p194
- ISSN
1068-820X
- Publication type
Article
- DOI
10.1007/s11003-017-0062-2