Effect of Process Parameters on the Pore Formation in a Low Magnetic Zr-based Alloy Fabricated by Powder Bed Fusion Process Using Fiber Laser
Recently,magnetic resonance imaging has become popular for medical diagnosis.However,when metallic implant exists in the human body,artifact formes around the implant due to the magnetic susceptibility difference between human tissue and metals.In order to solve the artifact problem in magnetic resonance images and realize tailor-made medical devices with complex shape,a low magnetic Zr-based alloy with high relative density(c.a.99.9%)were successfully fabricated by powder bed fusion process with fiber laser(L-PBF)using gas-atomized Zr-based alloy powder.Three kinds of pore distribution,which are surface pore,randomly distributed pore and large pore,were confirmed in the as built alloy.Relative density and pore distribution varied with the combined influence of energy density and scanning speed.The as built Zr-1Mo alloy showed similar magnetic susceptibility with the as cast Zr-1Mo alloy.Thus,L-PBF process can be applicable to the fabrication of the low magnetic Zr-based alloy for tailor-made biomedical applications.
MRI artifacts Magnetic susceptibility Powder bed fusion process using fiber laser Zr-based alloy Pore formation
Nomura Naoyuki Sun Xiaohao Zhou Weiwei Kikuchi Keiko Kawasaki Akira
Department of Materials Processing,Graduate School of Engineering,Tohoku University,Sendai 9808579,Miyagi,Japan
国际会议
北京
英文
1832-1836
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）