874 Powder Metallurgy Alloys

The tensile properties of blended elemental (BE) product (elemental additions) meet typical minimum wrought specification properties (Table 8.10). However, because of the remnant salt (from the extraction process) and associated porosity, fatigue behavior is below wrought levels. However, this behavior may be enhanced in a similar fashion to cast product by use of innovative heat treatments or THP. At a cost penalty, properties may also be improved by using higher priced salt-free titanium sponge or a newly available hydride powder produced using a calcium process [5-7].

TABLE 8.10 Typical Tensile Properties of Blended Elemental Ti-6Al-4V Compacts Compared to Mill-Annealed Wrought Products


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