Ti−6Al−4V alloy was fabricated via selective laser melting(SLM)to improve its corrosion resistance for implant.The microstructure and electrochemical corrosion behavior were investigated using scanning electron micros...Ti−6Al−4V alloy was fabricated via selective laser melting(SLM)to improve its corrosion resistance for implant.The microstructure and electrochemical corrosion behavior were investigated using scanning electron microscopy(SEM),electron backscatter diffraction(EBSD),transmission electron microscopy(TEM),electrochemical test and contact angle test.It can be found that the as-selective laser melted(as-SLMed)Ti−6Al−4V alloys showβcolumnar microstructure in building direction and nearly circular checkerboard microstructure in scanning direction,while the wrought and wrought+HT samples exhibit equiaxed microstructure.The as-SLMed Ti−6Al−4V alloy exhibits better corrosion resistance than the wrought and wrought+HT samples due to hydrophobicity,high grain boundary density and uniform distribution of alloying elements in simulated artificial saliva at 37℃.展开更多
基金the financial support for this work from the National Natural Science Foundation of China(No.52205334)the Natural Science Foundation of Hunan Province,China(No.2022JJ40495)+2 种基金the Changsha Key Research and Development Project,China(No.kh2201275)the Changsha Municipal Natural Science Foundation,China(No.kq2202196)the Tribology Science Fund of State Key Laboratory of Tribology in Advanced Equipment,China(No.SKLTKF21B08)。
基金The authors are grateful for the financial supports from the National Key R&D Program of China(2017YFB1104100)the New Young Teachers Initiation Plan,China(18X100040027)+1 种基金the National Natural Science Foundation of China(51971142)the China Postdoctoral Science Foundation(19Z102060057).
文摘Ti−6Al−4V alloy was fabricated via selective laser melting(SLM)to improve its corrosion resistance for implant.The microstructure and electrochemical corrosion behavior were investigated using scanning electron microscopy(SEM),electron backscatter diffraction(EBSD),transmission electron microscopy(TEM),electrochemical test and contact angle test.It can be found that the as-selective laser melted(as-SLMed)Ti−6Al−4V alloys showβcolumnar microstructure in building direction and nearly circular checkerboard microstructure in scanning direction,while the wrought and wrought+HT samples exhibit equiaxed microstructure.The as-SLMed Ti−6Al−4V alloy exhibits better corrosion resistance than the wrought and wrought+HT samples due to hydrophobicity,high grain boundary density and uniform distribution of alloying elements in simulated artificial saliva at 37℃.
基金supported by the National Natural Science Foundation of China(52222112,52101151)Shenzhen Science and Technology Program(SGDX20210823104002016,JCYJ20220531095217039)Hong Kong Research Grant Council(RGC,C1020-21G,C1017-21G)。
