| Abstract: | | 1. |
For powdered tungsten alloys with carbide and carbooxide strengthening it was established that in recrystallization there are three regions of structural changes characterized by different activation energy.
| | 2. |
In deformed powdered alloys with additions of Y2O3 and HfC+C deformation (diffusion) contrast on subgrain boundaries and relaxation of subboundaries at the initial stages of polygonization were discovered.
| | 3. |
Formation of particles of the second phase in powdered tungsten alloys leads to an increase of the temperature of onset of structural changes by 200–400°C in comparison with unalloyed tungsten, and the maximal effect there is attained upon formation of finely disperse particles of the carbide HfC.
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A. A. Baikov Institute of Metallurgy. Scientific and Production Association "Tulachermet". Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 23–26, January, 1988. |
