A novel rapid alloy development method towards powder bed additive manufacturing, demonstrated for binary Al-Ti, -Zr and -Nb alloys

Investigation of Ti1−x(Zr,Ta,V,W)xB2 and Al3Ti1−x(Zr,V)x grain refiners in additively manufactured Al-2 wt%Cu alloys by a high throughput method

“…Target configuration and design was Since the max-to-min variation in sputter yield was only $ 30 % [33] for the doping elements, one simulation with an average in sputter yield of 0.7 could be used to estimate all combinations. Particle release density from the race track and angular release distribution are described in previous work [16]. In total 8.3 M parti- cles were released from the targets out of which 35 % landed on the substrate.…”

“…To efficiently study large variations in doping levels x in Ti x-1 M x B 2 and Al 3 Ti 1-x M x we have refined and improved the high throughput method previously developed in [16]. This method, through a combination of co-sputtering and laser remelting, can produce large compositional gradients with PBF-mimicked The target configuration and composition was designed so that lines of fixed sum Ti + X at% could be cut out from the remelted plates, see Fig.…”

“…PBF studies have shown that both compound grain refiners such as TiB, TiC and TiN [13][14][15] and single phase/element grain refiners, like most peritectic elements and Sc, provide excellent grain refinement [4,16,17,18,19,20,21]. It is, however, far from clear that the nucleation sequence occurring during casting, also occurs during PBF, as both the solidification rate (10 6 -10 7 K°/s) and melt temperature (reaching boiling point of the metal) are several orders higher [22].…”

“…For solidification of Al on TiB 2 the epitaxial orientation relationship (OR) (0001)/ [11][12][13][14][15][16][17][18][19][20] TiB2 //(1 1 1)[0-11] Al is reported [12,13]. This indicates that the a-lattice parameter should be matched against the nearest neighbor distance in Al.…”

Machine learning in nuclear materials research

“…Thermal anneal of the films have been attempted but it is unclear if thermodynamically stable phases can be achieved 157 . Combinatorial gradients can also be obtained by additive manufacturing using powder bed fusion methods 158 or direct energy deposition in a laser engineered net shaping (LENS) approach 159 . As an example, during the LENS process, pure or premixed powder blends are transferred into the interaction zone of a laser beam through nozzles with the help of a carrier gas.…”