Electrochemical Corrosion Behavior and Mechanical Response of Selective Laser Melted Porous Metallic Biomaterials  

作　　者：Kai Hu Lei Zhang Yuanjie Zhang Bo Song Shifeng Wen Qi Liu Yusheng Shi 

机构地区：[1]State Key Laboratory of Materials Processing and Die and Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan,430074,China [2]Department of Mechanical Engineering,City University of Hong Kong,Tat Chee Avenue,Kowloon,Hong Kong,China [3]AVIC Manufacturing Technology Institute,Science and Technology on Power Beam Processes Laboratory,Beijing Key Laboratory of High Power Beam Additive Manufacturing Technology and Equipment,Aeronautical Key Laboratory for Additive Manufacturing Technologies,Beijing,100024,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2023年第8期1235-1246,共12页金属学报（英文版）

基　　金：supported by the Joint Program of the National Natural Science Foundation of China(U1808216);the National Natural Science Foundation of China(Grant No.52275331);the Key Research and Development Program of Hubei Province(No.2022BAA011);the Academic Frontier Youth Team(2018QYTD04)at Huazhong University of Science and Technology(HUST);the Laboratory Project of Science and Technology on Power Beam Processes Laboratory and the Hong Kong Scholars Program(No.XJ2022014).

摘　　要：The porous metallic biomaterials have attracted significant attention for implants because their lower young's modulus matches the human bones, which can eliminate the stress shielding effect and facilitate the growth of bone tissue cells. The porous metallic biomaterials fabricated by selective laser melting (SLM) have broad prospects, but the surface of the SLM-built porous structure has been severely adhered with unmelted powders, which affects the forming accuracy and surface quality. The porous metallic biomaterials face the corrosion problem of complex body fluid environments during service, so their corrosion resistance in the human body is extremely important. The surface quality will affect the corrosion resistance of the porous metallic biomaterials. Therefore, it is necessary to study the effect of post-treatment on the corrosion resistance of SLMed samples. In this work, the mechanical response and the electrochemical corrosion behavior in simulated body fluid of diamond and pentamode metamaterials Ti-6Al-4V alloy fabricated by SLM before and after sandblasting were studied. After sandblasting, the mechanical properties of the two porous metallic biomaterials were slightly improved, and the self-corrosion potential and pitting potential were more negative;meanwhile, the self-corrosion current density and passive current density increased, indicating that its corrosion performance decreased, and the passive film stability of sandblasted samples got worse.

关 键 词：Selective laser melting Porous metallic biomaterials Mechanical behavior Electrochemical corrosion behavior TI-6A1-4V 

分 类 号：TG665[金属学及工艺—金属切削加工及机床] TB33[一般工业技术—材料科学与工程]