title: Investigation on the microstructure, mechanical property and corrosion behavior of the selective laser melted CoCrW alloy for dental application.
abstract: In this study, an experimental investigation on fabricating Ni-free CoCrW alloys by selective laser melting (SLM) for dental application was conducted in terms of microstructure, hardness, mechanical property, electrochemical behavior, and metal release; and line and island scanning strategy were applied to determine whether these strategies are able to obtain expected CoCrW parts. The XRD revealed that the γ-phase and ε-phase coexisted in the as-SLM CoCrW alloys; The OM and SEM images showed that the microstructure of CoCrW alloys appeared square-like pattern with the fine cellular dendrites at the borders; tensile test suggested that the difference of mechanical properties of line- and island-formed specimens was very small; whilst the outcomes from the electrochemical and metal release tests indicated that the island-formed alloys showed slightly better corrosion resistance than line-formed ones in PBS and Hanks solutions. Considering that the mechanical properties and corrosion resistance of line-formed and island-formed specimens meet the standards of ISO 22674:2006 and EN ISO 10271, CoCrW dental alloys can be successfully fabricated by line and island scanning strategies in the SLM process.
authors: Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, China.
authors: Yanjin
authors: Y
authors: Lu
authors: Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, China.
authors: Songquan
authors: S
authors: Wu
authors: Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, China.
authors: Yiliang
authors: Y
authors: Gan
authors: Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, China.
authors: Junlei
authors: J
authors: Li
authors: Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, China; College Materials Science and Engineering, Fujian Normal University, Fuzhou, China.
authors: Chaoqian
authors: C
authors: Zhao
authors: Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, China.
authors: Dongxian
authors: D
authors: Zhuo
authors: Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, China. Electronic address: franklin@fjirsm.ac.cn.
authors: Jinxin
authors: J
authors: Lin
mesh_terms: D002857:Chromium / Q000737:chemistry; D003035:Cobalt / Q000737:chemistry; D003343:Corrosion; D003722:Dental Alloys; D003764:Dental Materials; D007834:Lasers; D014414:Tungsten / Q000737:chemistry
chemical_list: D003722:Dental Alloys; D003764:Dental Materials; D002857:Chromium; D003035:Cobalt; D014414:Tungsten
keywords: CoCrW alloys; Corrosion resistance; Dental application; Metal release; Scanning strategy; Selective laser melting