(262-0435)Microstructure and magnetic susceptibility of Zr-1Mo alloy fabricated by powder bed fusion process using fiber laser for biomedical applications

摘要

Magnetic resonance imaging (MRI) is widely used as a powerful diagnostic tool in orthopedicsand brain surgery. However, MRI diagnosis is inhibited when metallic implant exists in the human body. This ismainly due to the formation of artifacts around the implants in MR images caused by the magneticsusceptibility difference between human body and metals [1]. In previous study, it has been proved that aZr-1Mo alloy showed acceptable strength, high corrosion resistance, and low cytotoxicity in addition to lowermagnetic susceptibility compared to that of Co-Cr and Ti alloys. On the other hand, powder bed fusion processusing a laser (PBFL) has attracted increasing attention in biomedical and aerospace industries, because PBFLhas the ability in fabricating complex parts with high yield ratio compared to conventional manufacturingroutes. In this study, we tried to fabricate Zr-1Mo alloy builds by PBFL in some conditions and evaluate theirmicrostructures and magnetic susceptibility.