首页|激光选区熔化制备Ti?6Al?4V合金的显微组织及在人工模拟唾液中的电化学腐蚀行为

激光选区熔化制备Ti?6Al?4V合金的显微组织及在人工模拟唾液中的电化学腐蚀行为

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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.
Microstructure and electrochemical corrosion behavior of selective laser melted Ti−6Al−4V alloy in simulated artificial saliva
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.

Ti−6Al−4V alloyselective laser meltingmicrostructureelectrochemical corrosion behavior

鞠江、李京京、蒋敏、李梦娅、杨力祥、王开明、杨超、康茂东、王俊

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上海交通大学材料科学与工程学院,凝固科学与技术研究所,上海 200240

上海交通大学上海市先进高温材料及其精密成型重点实验室,上海 200240

北京理工大学宇航学院,北京 100081

清华大学机械工程系摩擦学国家重点实验室,北京 100084

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Ti−6Al−4V合金 激光选区熔化 显微组织 电化学腐蚀行为

authors are grateful for the financial supports from the National Key R&D Program of ChinaNew Young Teachers Initiation Plan, ChinaNational Natural Science Foundation of ChinaChina Postdoctoral Science Foundation

2017YFB110410018X1000400275197114219Z102060057

2021

10.1016/S1003-6326(20)65485-1

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCDCSCDSCI
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2021.31(1)
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