レーザ積層造形法によるβ型Ti-15Mo-5Zr-3Al合金の集合組織形成

抄録

Selective laser melting (SLM), a kind of additive manufacturing (AM) technologies, enables to fabricate highly complicated 3-dimensional structures from a powdered metallic materials. Recent investigations demonstrated the ability of SLM to form crystallographically texturized parts. Highly texturized materials exhibit anisotropic functions; therefore, control of texture via AM is becoming attractive strategy for developing functionalized materials. In the present study, we tried to find laser conditions for formation of randomly and highly texturized parts in SLM of T-15Mo-5Zr-3Al biomedical alloy. We successfully achieved randomly and highly texturized parts under the conditions of (low laser power and low scan speed) and (high laser power and high scan speed), respectively. The highly texturized part showed anisotropy in Young’s modulus in which the value in <001> oriented direction was significantly lower than that in <011> oriented direction, the similar trend to those reported in single crystal of this alloy. The evolution of crystallographic texture was thought to be related with melt-pool shape, which needs further investigations.