Hydrogen and its effect on the grinding of Ti-Ni powder

OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 23 No. 3 2021 0 10 20 30 40 50 60 70 80 90 0.0 0.1 0.2 0.3 <d> = 10.9 µ m Std. Dev = 10.9 µ m d med = 8.1 µ m d ( µ m) W N W Ni (% ) ∑ 0 20 40 60 80 100 0 10 20 30 40 50 60 70 80 90 0.0 0.1 0.2 0.3 0.4 <d> = 9.7 µ m Std. Dev = 9.6 µ m d med = 7.3 µ m 0 20 40 60 80 100 d ( µ m) W N W Ni (% ) ∑ 0 10 20 30 40 50 60 0.0 0.1 0.2 0.3 0.4 <d> = 6.7 µ m Std. Dev = 7.7 µ m d med = 3.7 µ m d ( µ m) 0 20 40 60 80 100 W N W Ni (% ) ∑ Fig. 1. SEM images and particle size distribution of the Ti-Ni powder after ball milling ( a , b ) and after mechanical treatment with pre-hydrogenation for 90 minutes ( c , d ), 180 minutes ( e , f ) a b c d e f