Degradation of Synthesized Material Obtained Using Recycled Powder in SLF Process: Part 2. Short-Term and Long-Term Strength at Operating Temperatures and Heat Resistance.

Autor: Evgenov, A. G., Shurtakov, S. V., Prager, S. M., Sborshchikov, A. A.
Zdroj: Inorganic Materials: Applied Research; Feb2024, Vol. 15 Issue 1, p126-137, 12p
Abstrakt: We demonstrate that an increase in the area of fused sections relative to the total area of the construction platform deteriorates the quality of the recycled powder owing to accumulating oxidized emissions. The quality of synthesized material deteriorates both as a result of cross-contamination caused by oxide particles (emissions) and metal condensate penetrating the construction zone and owing to the use of recycled powder. The different mechanisms of contamination are established for the metal synthesized at high filling densities of the construction platform. A dense arrangement of samples and dominating exposure of the base metal result in better segregation of chromium oxides at the grain interfaces. A significant decrease in strength and ductility is obtained at a temperature of 1000°C after the second run. These parameters remain practically the same during further testing. The long-term strength slightly increases in the samples obtained in the second and the third run. The heat resistance of synthesized VZh159 alloy depends very little on the use of recycled powder. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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