摘要
镁及镁合金具有高比强度、低密度、可降解性、与人体相似的弹性模量以及良好的生物相容性等优势,而被认为是生物医学领域极具应用潜力的材料。然而,镁合金较差的力学性能和耐腐蚀性能限制了其进一步的应用。采用钨极气体保护焊(TIG)电弧增材制造工艺制备了AZ61镁合金试样,研究了该合金的力学性能和其在模拟人体体液(SBF)中的耐腐蚀性能。结果表明,增材镁合金试样的极限抗拉强度为278.5 MPa,延伸率为30.78%,增材镁合金在SBF中的腐蚀电流密度为2.827×10^(-6) A/cm^(2),较铸态镁合金降低了两个数量级。增材制造的镁合金试样不仅具有优异的力学性能,同时在SBF中展现出良好的耐蚀性。
Magnesium and magnesium alloys are regarded as materials with considerable potential for biomedical applications,given their high specific strength,low density,degradability,elastic modulus comparable to that of the human body,and favorable biocompatibility.However,the inferior mechanical properties and corrosion resistance of magnesium alloys restrict their further applications.AZ61 magnesium alloy specimens were prepared using the tungsten inert gas(TIG)arc additive manufacturing process,and the mechanical properties of the alloy and its corrosion resistance in simulated body fluids(SBF)were investigated.The findings revealed that the ultimate tensile strength of the additively manufactured magnesium alloy specimen was 278.5 MPa,the elongation was 30.78%,and the corrosion current density of the additively manufactured magnesium alloy in SBF was 2.827×10^(-6) A/cm^(2),which was two orders of magnitude lower than that of the cast magnesium alloy.The additively fabricated magnesium alloy specimens demonstrate not only excellent mechanical properties but also good corrosion resistance in SBF.
作者
邹天乐
甘迪奇
李普博
杜宇航
宁昊
芮雅宝
张超
ZOU Tianle;GAN Diqi;LI Pubo;DU Yuhang;NING Hao;RUI Yabao;ZHANG Chao(School of Materials and New Energy,Ningxia University,Yinchuan 750021,China;West China Hospital of Sichuan University,Chengdu 610044,China;Ningxia Hui Autonomous Region People’s Hospital,Yinchuan 750002,China;Zhuzhou Central Hospital,Zhuzhou 412000,China)
出处
《西北工程技术学报》
CAS
2024年第3期193-198,共6页
Ningxia Engineering Technology
基金
“西部之光”人才培养计划项目(2023QNXZ0046)
宁夏重点研发计划项目(2024BEE03004)。
关键词
AZ61镁合金
电弧增材制造
力学性能
腐蚀性能
AZ61 magnesium alloy
arc additive manufacturing
mechanical properties
corrosion
