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为了进一步提高植入体的耐腐蚀性,通过激光选区熔化制备Ti?6Al?4V合金.借助扫描电镜、电子背散射、透射电镜、电化学腐蚀试验和接触角试验对其显微组织和在人工模拟唾液中的电化学腐蚀行为进行研究.结果表明:激光选区熔化制备Ti?6Al?4V合金在堆积方向呈现典型的β柱状晶,在扫描方向呈近圆形棋盘状组织,而锻造和锻造+热处理样品呈现典型的等轴晶形貌.在37°C模拟人工唾液中激光选区熔化制备Ti?6Al?4V合金比锻造和锻造+热处理样品具有更好的耐腐蚀性能,这是由于其具有疏水性、更高的晶界密度和分布均匀的合金元素.“,”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 show β columnar 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 °C.