Rotating scanning strategies for tailoring crystallographic texture of additively manufactured NiTi shape memory alloy

Abstract

In addition to the ability to create complicated shapes, a key benefit of additive manufacturing (AM) is the ability to customize the microstructure and, therefore, the qualities of the components. Scan strategy has significant potential to alter the microstructure of materials. This work present new methods for controlling the crystallographic texture of as-printed Nickel Titanium (NiTi) components by rotating the scan strategies. In order to accomplish this goal, three scan strategies were chosen: 90-degree, 45-degree, and 67-degree rotation scan strategies. The sample manufactured using the 90-degree scan strategy has a significant 〈001〉 texture in the build-up and scanning directions. However, the 45-degree and 67-degree rotation scan strategies reveal a new crystallographic texture in ZY and XY planes.