Dynamic forging of parts from titanium powder with counterpressure

Sypko, A. V.; Dolgii, N. I.; Gavrilov-Kryamichev, N. L.

doi:10.1007/bf00791939

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2023

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“…With one-sided pressing in a closed die, the compaction degree and porosity change along the height of the pressing due to friction against the walls of the matrix. To prevent or reduce this inhomogeneity, double-sided pressing [11] or pressing with counterpressure [12] is used. The use of the effect of shear deformation is considered for improving of mechanical properties of hot-pressed powder billets [13,14].…”

Section: Introductionmentioning

confidence: 99%

Hot Consolidation of Titanium Powders

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Firsina

Baranovskiy

et al. 2023

Powders

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A novel method of the hot consolidation metal powders with shear deformation is proposed. The powders were encapsulated into tight containers and compacted after short-term heating in a furnace preheated to 900 °C. The method prevents powder oxidation, peripheral spalling and ensures the removal of the oxide films from the powder surfaces. Commercial titanium powders of different dispersivities and impurity concentrations were hot-compacted. The microstructure, hardness and bending strength of the compacts were investigated. The compacts from fine PTOM-1 powder, containing 0.32% of hydrogen, reveal the greatest values of the hardness and bending strength. Additional annealing results in 60% increase in the bending strength.

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Section: Introductionmentioning

confidence: 99%