电弧增材制造AZ61镁合金的力学性能和腐蚀性能研究
Research on Mechanical and Corrosion Properties of AZ61 Magnesium Alloy for Arc Additive Manufacturing
邹天乐 1甘迪奇 2李普博 1杜宇航 1宁昊 1芮雅宝 3张超4
作者信息
- 1. 宁夏大学材料与新能源学院,宁夏 银川 750021
- 2. 四川大学 华西医院,四川 成都 610044
- 3. 宁夏回族自治区人民医院,宁夏银川 750002
- 4. 株洲市中心医院,湖南株洲 412000
- 折叠
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/cm2,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.
Abstract
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/cm2,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.
关键词
AZ61镁合金/电弧增材制造/力学性能/腐蚀性能Key words
AZ61 magnesium alloy/arc additive manufacturing/mechanical properties/corrosion引用本文复制引用
基金项目
"西部之光"人才培养计划项目(2023QNXZ0046)
宁夏重点研发计划项目(2024BEE03004)
出版年
2024
国家科技期刊平台
NSTL
万方数据