Table 1.

Powder lot descriptions and powder oxygen contents. Uncertainties in oxygen readings are indicated value ± 2.5 %.

		Powder Oxygen Content (% mass fraction)
Identifier	Powder Mixture Description	Before build	After build
A	100 % virgin powder	0.11	0.123
B	100 % 5× reused powder	0.142	0.157
C	Mixture of 96.5 % 5× reused and 3.5 % aged at 650 °C for 4 h	0.340	0.292
D	Mixture of 88.8 % 5× reused and 11.2 % aged at 650 °C for 4 h	0.525	0.455