96 / 2018-08-07 17:41:05

Additive Manufactured SS316L and Ti6Al4V Biomaterials: Mechanical and Corrosion Performance

Additive manufacturing, corrosion, electrochemistry

全体主题 > vi. BAMOS (Biomaterials and Additive Manufacturing: Osteochondral Scaffold innovation)

Additive manufacturing (AM) is an advanced manufacturing technology to fabricate metallic products of complex shape. Selective laser melting (SLM) is a representative method of AM. Stainless steel 316L (SS316L) and TiAl4V alloys are widely used in biomedical applications, such as bone fracture fixation and orthopaedic implants. Since the shape and dimension of medical device can be adjusted precisely based on personal data, SLM can boost the customization of SS316L and Ti6Al4V medical devices. This research project will focus on corrosion and mechanical properties of SLM manufactured SS316L and Ti6Al4V towards biomedical applications. Electrochemical techniques, including open-cricuit potential (OCP), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization curve (PC) were performed to investigate corrosion behaviour of both alloys in a 3.5% NaCl testing solution. Compared to conventionally manufactured materials, SLM manufactured Ti6Al4V exhibited significant improvement both in corrosion resistance and micorhardness, but SS316L demonstrated deteriated corrosion and hardenss performance.